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WO2014063584A1 - Method and device for transmitting ionospheric delay correction parameters, and navigation satellite - Google Patents

Method and device for transmitting ionospheric delay correction parameters, and navigation satellite Download PDF

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Publication number
WO2014063584A1
WO2014063584A1 PCT/CN2013/085303 CN2013085303W WO2014063584A1 WO 2014063584 A1 WO2014063584 A1 WO 2014063584A1 CN 2013085303 W CN2013085303 W CN 2013085303W WO 2014063584 A1 WO2014063584 A1 WO 2014063584A1
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WIPO (PCT)
Prior art keywords
ionospheric delay
delay correction
correction parameter
navigation
parameter sets
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PCT/CN2013/085303
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French (fr)
Chinese (zh)
Inventor
黄河
马志锋
魏林辉
马子江
刘红军
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ZTE Corp
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ZTE Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/07—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
    • G01S19/072—Ionosphere corrections

Definitions

  • the present invention relates to the field of communications, and in particular to a method, device, and navigation satellite for transmitting ionospheric delay correction parameters.
  • BACKGROUND OF THE INVENTION The BeiDou (COMPASS) Navigation Satellite System is a self-developed, independently operating global satellite navigation system being implemented in China. Beidou satellite navigation system is committed to providing high quality positioning, navigation and timing services to users around the world, including open service and authorized service.
  • the open service provides free positioning, speed measurement and timing service to the world.
  • the positioning accuracy is 10 meters, the speed measurement accuracy is 0.2 m/s, and the timing accuracy is 10 nanoseconds.
  • the Authorized Service provides positioning, speed measurement, timing and communication services, and system integrity information for users with high-precision, highly reliable satellite navigation needs.
  • the Beidou satellite navigation system consists of three parts: the space segment, the ground segment and the user segment.
  • the space segment includes five geostationary orbit satellites and 30 non-geostationary orbit satellites.
  • the ground segment includes several ground stations, such as the main control station, the injection station and the monitoring station.
  • the user segment includes a Beidou user terminal and a terminal compatible with other satellite navigation systems. Satellite navigation system is an important spatial information infrastructure. It has been widely used in many fields such as surveying and mapping, telecommunications, water conservancy, fishery, transportation, forest fire prevention, disaster reduction and public security, and military. It is closely related to national security.
  • ionospheric delay is one of the serious error sources of satellite navigation technology. Can it effectively eliminate or reduce the accuracy and reliability of ionospheric delay error related to satellite navigation terminal positioning.
  • navigation satellite systems such as GPS and Galileo broadcast ionospheric delay correction parameters in navigation messages for ionospheric delay correction.
  • the ionospheric delay correction parameters are valid for all users (all regions) in the world.
  • Embodiments of the present invention provide a method, a device, and a navigation satellite for transmitting ionospheric delay correction parameters, so as to at least solve the positioning accuracy caused by using the same ionospheric model and ionospheric delay correction parameters in the related art in the related art. Low problem.
  • a method for transmitting an ionospheric delay correction parameter comprising: acquiring, by a navigation satellite, a plurality of ionospheric delay correction parameter sets, wherein each of the ionospheric delay correction parameter sets corresponds to a applicable region Range; the navigation satellite broadcasts a plurality of the above-mentioned ionospheric delay correction parameter sets through a navigation message.
  • the navigation satellite acquires a plurality of the ionospheric delay correction parameter sets by at least one of: the navigation satellite acquires a plurality of the ionospheric delay correction parameter sets from the ground control station; and the navigation satellites are from the navigation satellites except The other navigation satellites acquire a plurality of the above-mentioned ionospheric delay correction parameter sets, wherein the navigation satellites and the other navigation satellites belong to the same navigation system.
  • the acquiring, by the navigation satellite, the plurality of ionospheric delay correction parameter sets from the ground control station comprises: acquiring, by the navigation satellites, different sets of ionospheric delay correction parameters from the same or different ground control stations, wherein the ionospheric delay is The modified parameter set is obtained by the above ground control station by detecting the ionosphere and/or analyzing historical data of the ionosphere.
  • the ground control station is a station located on the ground and communicating with the navigation satellite, wherein the ground control station comprises: a main control station, an injection station, and a monitoring station.
  • the navigation message further includes at least one of the following: an applicable region range information corresponding to each of the ionospheric delay correction parameter sets, and an ionospheric model applicable to each of the ionospheric delay correction parameter sets, wherein different ionizations
  • the layer model corresponds to different ionospheric delay calculation methods.
  • the navigation satellite determines the applicable region range information and the applicable ionospheric model corresponding to each of the ionospheric delay correction parameter sets by the following steps: the navigation satellite is configured in the navigation message according to each of the above-mentioned ionospheric delay correction parameter sets.
  • the different ionospheric delay correction parameter sets have at least one of the following characteristics: different ionospheric delay correction parameter sets correspond to the same or different ionospheric models; different ionospheric delay correction parameter sets include the same number of parameters or Different; the parameters of different ionospheric delay correction parameter sets are the same or different.
  • the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets by using the navigation message: the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets to the terminal by using the navigation message, and/or is in the same navigation as the navigation satellite.
  • Other navigation satellites in the system Preferably, when the navigation satellite broadcasts a plurality of the above-mentioned ionospheric delay correction parameter sets to other navigation satellites in the same navigation system as the navigation satellite by using a navigation message, the navigation satellite is a geostationary satellite, and the navigation Other navigation satellites of the satellite in the same navigation system are non-geostationary orbit satellites.
  • the navigation satellite broadcasts a plurality of the ionospheric delay correction parameter sets by: the navigation satellite encrypts and then broadcasts part or all of the ionospheric delay correction parameter sets of the plurality of ionospheric delay correction parameter sets.
  • the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets by using the navigation message: the navigation satellite broadcasts different ionospheric delay correction parameter sets in the same or different broadcast channels, wherein different broadcast channels correspond to different Frequency point.
  • an apparatus for transmitting ionospheric delay correction parameters comprising: an acquisition module configured to acquire a plurality of ionospheric delay correction parameter sets, wherein each of said ionospheric delay correction parameter sets Corresponding to the applicable area range; the broadcast module is configured to broadcast a plurality of the above-mentioned ionospheric delay correction parameter sets by the navigation message.
  • a navigation satellite comprising any of the above-described ionospheric delay correction parameter transfer means.
  • the navigation satellite acquires a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set in the plurality of ionospheric delay correction parameter sets corresponds to an applicable regional range, and the navigation satellite And broadcasting the plurality of ionospheric delay correction parameter sets by using a navigation message, so that the ionospheric delay correction parameter set adapted to the geographical area can be selected for different geographical regions to correct the ionospheric delay, thereby reflecting different geographical regions.
  • the ionospheric delay characteristics improve positioning accuracy.
  • FIG. 1 is a flow chart of a method for transmitting ionospheric delay correction parameters according to an embodiment of the present invention
  • 2 is a schematic diagram of a network structure of a method for transmitting ionospheric delay parameters according to an embodiment of the present invention
  • FIG. 1 is a flow chart of a method for transmitting ionospheric delay correction parameters according to an embodiment of the present invention
  • 2 is a schematic diagram of a network structure of a method for transmitting ionospheric delay parameters according to an embodiment of the present invention
  • FIG. 1 is a flow chart of a method for transmitting ionospheric delay correction parameters according to an embodiment of the present invention
  • 2 is a schematic diagram of a network structure of a method for transmitting ionospheric delay parameters according to an embodiment of the present invention
  • FIG. 1 is a flow chart of a method for transmitting ionospheric delay correction parameters according to an embodiment of the present invention
  • 2 is
  • FIG. 3 is a schematic diagram of a network structure of a method for transmitting ionospheric delay parameters according to an embodiment of the present invention
  • FIG. FIG. 5 is a block diagram showing the structure of another apparatus for transmitting ionospheric delay correction parameters according to an embodiment of the present invention
  • FIG. 6 is an ionosphere according to an embodiment of the present invention.
  • FIG. 7 is still another processing flowchart of the method for transmitting the ionospheric delay correction parameter according to an embodiment of the present invention.
  • a method for transmitting an ionospheric delay correction parameter includes steps S102 to S104.
  • Step S102 The navigation satellite acquires a plurality of ionospheric delay correction parameter sets, where each ionospheric delay correction parameter set corresponds to an applicable region range.
  • Step S104 The navigation satellite broadcasts a plurality of ionospheric delay correction parameter sets through the navigation message.
  • the navigation satellite acquires a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set of the plurality of ionospheric delay correction parameter sets corresponds to a applicable region range, and the navigation satellite passes the navigation message Broadcasting the plurality of ionospheric delay correction parameter sets to enable the ionospheric delay correction parameter set to be adapted to different geographical regions to correct the ionospheric delay, thereby embodying the ionospheric delay characteristics of different geographical regions. , thereby improving the positioning accuracy.
  • the navigation satellite may be any type of satellite in the navigation system, for example, it may be a geostationary satellite or a non-stationary orbit satellite.
  • the navigation satellite may acquire a plurality of the ionospheric delay correction parameter sets by at least one of the following: the navigation satellite acquires a plurality of the ionospheric delays from the ground control station. Correcting the parameter set; the above navigation satellites are from other navigational satellites other than the navigation satellite The star acquires a plurality of the above-described ionospheric delay correction parameter sets, wherein the navigation satellite and the other navigation satellites belong to the same navigation system.
  • the network structure diagram 1 of the method for transmitting the ionospheric delay parameter shown in FIG. 2 the network entity involved in the preferred embodiment may include: a navigation satellite, a ground control station, and a terminal.
  • the navigation satellites obtain the ionospheric delay correction parameter set from the ground control station, and the navigation satellite may be a geostationary orbit satellite or a non-geostationary orbit satellite, and the acquired ionospheric delay correction parameter set is sent to the terminal.
  • the acquiring, by the navigation satellite, the plurality of ionospheric delay correction parameter sets from the ground control station comprises: acquiring, by the navigation satellites, different ionospheric delay correction parameter sets from the same or different ground control stations.
  • the ionospheric delay correction parameter set is obtained by the ground control station by detecting the ionosphere and/or analyzing historical data of the ionosphere. That is, the ground control station obtains a plurality of the above-mentioned ionospheric delay correction parameter sets by detecting the ionosphere and/or analyzing historical data of the ionosphere (which can update the ionospheric delay correction parameter set of the navigation satellite broadcast).
  • the uplink channel transmits a plurality of the above-described ionospheric delay correction parameter sets to the navigation satellite.
  • the ground control station is a station located on the ground and communicating with the navigation satellite, wherein the ground control station may include but is not limited to the following types of stations: a main control station, an injection station, and a monitoring station.
  • the navigation message may further include at least one of the following: applicable region range information corresponding to each of the ionospheric delay correction parameter sets, and each of the ionospheric delay correction parameter sets.
  • a suitable ionospheric model in which different ionospheric models correspond to different ionospheric delay calculation methods. That is, in the above navigation message, the applicable region range and the applicable ionospheric model corresponding to each ionospheric delay correction parameter set are indicated, so that the terminal can accurately and conveniently correct the parameters and the ionospheric model according to the corresponding ionospheric delay in the geographical region. The ionospheric delay is calculated to further improve the positioning accuracy of different geographical regions.
  • the navigation satellite determines the applicable region range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets by the following steps: the navigation satellite is configured according to each ionospheric delay correction parameter set in the navigation message
  • the sequence or location protocol in the convention stipulates the applicable region range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets.
  • the order of the number set in the above navigation message is to agree on the applicable area range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets, and the first ionosphere in the order of appearance in the above navigation message is agreed upon.
  • the delay correction parameter set is globally applicable and uses the KLOBUCHAR model.
  • the second ionospheric delay correction parameter set is applicable to the Asian range and uses the enhanced KLOBUCHAR model.
  • different ionospheric delay correction parameter sets correspond to the same or different applicable regions. range. That is, different ionospheric delay correction parameter sets correspond to the same or different applicable region ranges.
  • the two ionospheric delay correction parameter sets can adopt different ionospheric models. To perform ionospheric delay correction in a targeted manner by different ionization delay calculation methods.
  • different ionospheric delay correction parameter sets may have at least one of the following features: different ionospheric delay correction parameter sets correspond to the same or different ionospheric models; different ionization
  • the layer delay correction parameter set contains the same or different number of parameters; the parameters of different ionospheric delay correction parameter sets are the same or different. That is, the plurality of ionospheric delay correction parameter sets may correspond to one ionospheric model or respectively correspond to different ionospheric models, or may include the same or different parameters, and the parameter values may be the same or different.
  • the ionospheric model described above may include, but is not limited to, the following models: for example, a KLOBUCHAR model, a NeQuick model, and an enhanced KLOBUCHAR model.
  • the navigation satellite broadcasts the plurality of ionospheric delay correction parameter sets by using the navigation message: the navigation satellite delays the plurality of ionospheric delay correction parameters by using the navigation message.
  • the set is broadcast to the terminal and/or other navigation satellites in the same navigation system as the navigation satellite described above.
  • FIG. 3 is a schematic diagram of a network structure of a method for transmitting an ionospheric delay parameter according to an embodiment of the present invention.
  • the network entity involved in this embodiment may include: a navigation satellite, a ground control station, and a terminal. .
  • the navigation satellite that broadcasts the plurality of ionospheric delay correction parameter sets is a geostationary orbit satellite, and the geostationary orbit satellite acquires an ionospheric delay correction parameter set from a ground control station and forwards it to a non-stationary orbital satellite.
  • Star and terminal There may be multiple ground control stations, and multiple sets of ionospheric delay correction parameters saved by the navigation satellite may come from different ground control stations.
  • the navigation satellite may broadcast a plurality of the above-mentioned ionospheric delay correction parameter sets by using different security policies.
  • the navigation satellite broadcasts a plurality of the above-mentioned ionospheric delay correction parameter sets by: The navigation satellite encrypts and then broadcasts part or all of the ionospheric delay correction parameter sets in the plurality of ionospheric delay correction parameter sets.
  • different security policies may be used to broadcast a plurality of the above-mentioned ionospheric delay correction parameter sets according to different needs, and the partial ionospheric delay correction parameter sets of the plurality of ionospheric delay correction parameter sets are not encrypted, and are freely used by all users; Another part of the ionospheric delay correction parameter set in the above-mentioned ionospheric delay correction parameter set is encrypted for use by some privileged users to obtain higher positioning accuracy.
  • the navigation satellite broadcasts the plurality of ionospheric delay correction parameter sets by using the navigation message: the navigation satellite broadcasts different ionospheric delay correction parameter sets in the same or different broadcast channels, Among them, different broadcast channels correspond to different frequency points. That is, different ionospheric delay correction parameter sets can be broadcast in the same satellite broadcast channel (same frequency point) or in different satellite broadcast channels (different frequency points).
  • the above navigation satellite may belong to, but is not limited to, the following navigation systems: for example, Beidou satellite navigation system, Global Position System (GPS), GALILEO, GLONASS (Global Satellite Navigation System in Russian, Global Naviga Tion Satellite Syste) and other navigation systems.
  • the ionospheric delay correction parameter transfer device includes: an acquisition module 402 configured to acquire a plurality of ionospheric delay corrections. a parameter set, wherein each of the ionospheric delay correction parameter sets corresponds to a applicable region range; the broadcast module 404 is coupled to the acquisition module 402, and configured to broadcast a plurality of the ionospheric delay correction parameter sets by using a navigation message.
  • the obtaining module 402 acquires a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set in the plurality of ionospheric delay correction parameter sets corresponds to a applicable area range, and the broadcast module 404
  • the plurality of ionospheric delay correction parameter sets are broadcasted by the navigation message, so that the ionospheric delay correction parameter set adapted to the geographical area can be selected for different geographical regions to correct the ionospheric delay, thereby reflecting the ionization of different geographical regions. Layer delay characteristics, which improve positioning accuracy.
  • the acquiring module 402 may obtain multiple sets of the ionospheric delay correction parameters by using at least one of the following methods: acquiring a plurality of the ionospheric delay correction parameters from the ground control station. Set; from a navigation satellite other than broadcasting a plurality of the above-described ionospheric delay correction parameter sets The other navigation satellites acquire a plurality of the above-mentioned ionospheric delay correction parameter sets, wherein the navigation satellites and the other navigation satellites belong to the same navigation system.
  • the obtaining module 402 obtains different sets of ionospheric delay correction parameters from the same or different ground control stations, wherein the ionospheric delay correction parameter set is that the ground control station passes the ionosphere Detection and/or analysis of historical data from the ionosphere.
  • the navigation message broadcast by the broadcast module 404 may further include at least one of the following: applicable area range information corresponding to each of the ionospheric delay correction parameter sets, each of the above ionizations.
  • the ionospheric model is applicable to the layer delay correction parameter set, wherein different ionospheric models correspond to different ionospheric delay calculation methods. That is, in the above navigation message, the applicable region range and the applicable ionospheric model corresponding to each ionospheric delay correction parameter set are indicated, so that the terminal can accurately and conveniently correct the parameters and the ionospheric model according to the corresponding ionospheric delay in the geographical region.
  • the ionospheric delay is calculated to further improve the positioning accuracy of different geographical regions. In order to improve the flexibility of the preferred embodiment to meet the requirements of different application scenarios, in the preferred embodiment, as shown in FIG.
  • the apparatus for transmitting the ionospheric delay correction parameter further includes: an appointment module 406, configured to pass The following steps determine the applicable region range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets: each of the above ionosphere is defined according to the sequence or position protocol of each ionospheric delay correction parameter set in the above navigation message The applicable region range information corresponding to the delay correction parameter set and the applicable ionosphere model.
  • the applicable area range information corresponding to each of the above-mentioned ionospheric delay correction parameter sets and the applicable ionospheric model are exemplified by the order of each ionospheric delay correction parameter set in the above-mentioned navigation message, and the navigation is as follows.
  • the first ionospheric delay correction parameter set in the order of appearance is applicable to the global scale and adopts the KLOBUCHAR model.
  • the second ionospheric delay correction parameter set is applicable to the Asian scope and adopts the enhanced KLOBUCHAR model.
  • the broadcast module 404 is further configured to broadcast, by using the navigation message, a plurality of the ionospheric delay correction parameter sets to the terminal and/or to broadcast the navigation message. Satellites are other navigation satellites in the same navigation system. Preferably, in the preferred embodiment, the broadcast module 404 broadcasts, by using the navigation message, a plurality of the ionospheric delay correction parameter sets to other navigation satellites in the same navigation system as the navigation satellites that broadcast the navigation message.
  • the navigation satellite is a geostationary orbit satellite, and the other navigation satellites in the same navigation system as the navigation satellite are non-stationary orbit satellites.
  • a plurality of the above-mentioned ionospheric delay correction parameter sets may be broadcasted by using different security policies.
  • the above broadcast module 404 broadcasts a plurality of the above-mentioned ionospheric delay repairs in the following manner.
  • Positive parameter set Some or all of the ionospheric delay correction parameter sets in the above-mentioned ionospheric delay correction parameter set are encrypted and then broadcast.
  • the broadcast module 404 is further configured to broadcast different sets of ionospheric delay correction parameters in the same or different broadcast channels, wherein different broadcast channels correspond to different frequency points.
  • FIG. 6 is another processing flowchart of the ionospheric delay correction parameter transmission method according to an embodiment of the present invention. As shown in FIG.
  • Step S602 The ground control station calculates the ionospheric delay correction parameter set of different regions by detecting the ionosphere and analyzing the historical data of the ionosphere, and The ionospheric delay correction parameter set is uploaded to the navigation satellite through the uplink channel.
  • Step S604 The navigation satellite broadcasts a plurality of ionospheric delay correction parameter sets in the navigation message, and defines and applies a range of ionization delay correction parameter sets by a protocol, and the first ionospheric delay correction parameter set in the navigation message includes The 8 parameters corresponding to the KLOBUCHAR model are applicable to the global scope; the second ionospheric delay correction parameter set contains 14 parameters corresponding to the enhanced KLOBUCHAR model for the Asian region.
  • Step S606 After receiving the navigation message, the terminal determines that it is in the Asian region according to the protocol agreement and the user setting, and selects the second ionospheric delay correction parameter set and uses the enhanced KLOBUCHAR model to calculate the ionospheric delay; If the user is not in the Asia-Pacific region, the terminal selects the first ionospheric delay correction parameter set and uses the KLOBUCHAR model to calculate the ionospheric delay.
  • the first ionospheric delay correction parameter set and the second ionospheric delay correction parameter set may be provided by different ground control stations.
  • the second ionospheric delay correction parameter set may be transmitted in an encrypted manner for use by an authorized user.
  • the first ionospheric delay correction parameter set may also be based on Different requirements are selected to be transmitted in encrypted or unencrypted mode.
  • different sets of ionospheric delay correction parameters may be broadcast in the same satellite broadcast channel (same frequency point) or in different satellite broadcast channels (different frequency points).
  • the use range of different ionospheric delay correction parameter sets is determined by a protocol convention, and FIG.
  • Step S702 The ground control station calculates the ionospheric delay correction parameter set in different regions by detecting the ionosphere and analyzing the historical data of the ionosphere, and The ionospheric delay correction parameter set is uploaded to the navigation satellite through the uplink channel.
  • Step S704 The navigation satellite broadcasts a plurality of ionospheric delay correction parameter sets in the navigation message, and also indicates the applicable range (applicable region range) of each ionospheric delay correction parameter set and the corresponding ionospheric model in the navigation message.
  • the ionospheric delay correction parameter set A (including 8 parameters) and its corresponding model are the KLOBUCHAR model, and the ionospheric delay correction parameter set A corresponds to the applicable range indication information, indicating that the applicable area range is global.
  • the ionospheric delay correction parameter set B (including 14 parameters) and its corresponding model are enhanced KLOBUCHAR models, and the ionospheric delay correction parameter set B corresponding to the applicable range indication information, indicating that the applicable area range is the Asia- Pacific region; S706: After receiving the navigation message, the terminal determines, according to the applicable area range and user setting corresponding to the ionospheric delay correction parameter set in the navigation message, that the location is in the Asian region, and selects the ionospheric delay correction parameter set B and uses the enhanced type.
  • the KLOBUCHAR model calculates the ionospheric delay; if the terminal determines that it is not in the Asia-Pacific region, the terminal selects the ionospheric delay correction parameter set A and uses the KLOBUCHAR model to calculate the ionospheric delay.
  • the first ionospheric delay correction parameter set and the second ionospheric delay correction parameter set may be provided by different ground control stations.
  • the ionospheric delay correction parameter set A related information is broadcasted in the satellite channel 1, the satellite channel 1 is not encrypted; the ionospheric delay correction parameter set B related information is broadcast in the satellite channel 2, the satellite Channel 2 is encrypted.
  • the above preferred embodiment achieves the following technical effects: acquiring a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set in the plurality of ionospheric delay correction parameter sets Corresponding to different applicable area ranges, and broadcasting the plurality of ionospheric delay correction parameter sets by navigation message, so that the ionospheric delay correction parameter set adapted to the geographical area can be selected for different geographical regions to calculate the ionospheric delay, and then It reflects the ionospheric delay characteristics of different geographical regions, thus improving the positioning accuracy.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

A method and device for transmitting ionospheric delay correction parameters, and a navigation satellite. The method comprises: a navigation satellite acquiring a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set corresponds to an application area range (S102); and the navigation satellite broadcasting the plurality of ionospheric delay correction parameter sets through navigation messages (S104). The method solves the problem of low positioning accuracy in the related art caused by the fact that the same ionospheric models and ionospheric delay correction parameters are used in the global range, thereby improving the positioning accuracy.

Description

电离层延迟修正参数的传递方法、 装置及导航卫星 技术领域 本发明涉及通信领域， 具体而言， 涉及一种电离层延迟修正参数的传递方法、 装 置及导航卫星。 背景技术 北斗卫星导航系统 （BeiDou (COMPASS) Navigation Satellite System)是中国正在 实施的自主发展、 独立运行的全球卫星导航系统。 北斗卫星导航系统致力于向全球用 户提供高质量的定位、 导航和授时服务， 包括开放服务和授权服务两种方式。 开放服 务是向全球免费提供定位、 测速和授时服务， 定位精度 10米， 测速精度 0.2米 /秒， 授 时精度 10纳秒。 授权服务是为有高精度、 高可靠卫星导航需求的用户， 提供定位、 测 速、 授时和通信服务以及系统完好性信息。 北斗卫星导航系统由空间段、 地面段和用 户段三部分组成， 空间段包括 5颗静止轨道卫星和 30颗非静止轨道卫星，地面段包括 主控站、 注入站和监测站等若干个地面站， 用户段包括北斗用户终端以及与其他卫星 导航系统兼容的终端。 卫星导航系统是重要的空间信息基础设施， 目前已经大规模应 用于测绘、 电信、 水利、 渔业、 交通运输、 森林防火、 减灾救灾公共安全和军事等诸 多领域， 与国家安全息息相关。 衡量卫星定位性能的一个重要指标是定位精度， 而卫星定位系统精度与空间环境 密切相联。 作为一个重要的环境因素， 电离层延迟是卫星导航技术严重误差源之一， 能否有效地消除或减弱电离层延迟误差关系到卫星导航终端定位的精度与可靠性。 目 前 GPS、 Galileo等导航卫星系统在导航电文中广播了电离层延迟修正参数用于进行电 离层时延修正， 该电离层延迟修正参数对全球所有用户 （所有区域） 有效。 考虑到地 球上不同地域的地理环境有较大差异， 而地理环境的巨大差异将导致电离层特性有明 显的不同， 在全球范围内使用同样的电离层模型和电离层延迟修正参数将无法准确地 体现出不同区域的电离层延迟特性， 导致无法准确计算出电离层延迟， 从而影响了最 终的定位精度。 针对相关技术中上述至少之一的问题， 目前尚未提出有效的解决方案。 发明内容 本发明实施例提供了一种电离层延迟修正参数的传递方法、 装置及导航卫星， 以 至少解决相关技术中由于全球范围内使用同样的电离层模型和电离层延迟修正参数导 致的定位精度低的问题。 根据本发明的一个方面， 提供了一种电离层延迟修正参数的传递方法， 其包括： 导航卫星获取多个电离层延迟修正参数集， 其中， 每个上述电离层延迟修正参数集对 应有适用地区范围；上述导航卫星通过导航电文广播多个上述电离层延迟修正参数集。 优选地， 上述导航卫星通过以下至少之一方式获取多个上述电离层延迟修正参数 集： 上述导航卫星从地面控制站获取多个上述电离层延迟修正参数集； 上述导航卫星 从除了上述导航卫星之外的其他导航卫星获取多个上述电离层延迟修正参数集，其中， 上述导航卫星和上述其他导航卫星属于同一导航系统。 优选地， 上述导航卫星从上述地面控制站获取多个上述电离层延迟修正参数集包 括： 上述导航卫星从相同或不同的地面控制站获取不同的电离层延迟修正参数集， 其 中， 上述电离层延迟修正参数集是上述地面控制站通过对电离层的检测和 /或对电离层 的历史数据分析得到的。 优选地， 上述地面控制站是坐落在地面且与导航卫星通信的站点， 其中， 上述地 面控制站包括： 主控站、 注入站、 监测站。 优选地， 上述导航电文还包括以下至少之一信息： 每个上述电离层延迟修正参数 集对应的适用地区范围信息、 每个上述电离层延迟修正参数集适用的电离层模型， 其 中， 不同的电离层模型对应不同的电离层延迟计算方法。 优选地， 上述导航卫星通过以下步骤确定每个上述电离层延迟修正参数集对应的 适用地区范围信息和适用的电离层模型： 上述导航卫星根据每个上述电离层延迟修正 参数集在上述导航电文中的顺序或位置， 协议约定每个上述电离层延迟修正参数集对 应的适用地区范围信息和适用的电离层模型。 优选地， 不同的电离层延迟修正参数集对应相同或不同的适用地区范围。 优选地， 不同的电离层延迟修正参数集具备以下至少之一特征： 不同的电离层延 迟修正参数集对应相同或不同的电离层模型； 不同的电离层延迟修正参数集包含参数 的个数相同或不同； 不同的电离层延迟修正参数集的参数取值相同或不同。 优选地， 上述导航卫星通过导航电文广播多个上述电离层延迟修正参数集包括： 上述导航卫星通过导航电文将多个上述电离层延迟修正参数集广播给终端和 /或与上 述导航卫星在同一导航系统中的其他导航卫星。 优选地， 在上述导航卫星通过导航电文将多个上述电离层延迟修正参数集广播给 与上述导航卫星在同一导航系统中的其他导航卫星的情况下， 上述导航卫星为静止轨 道卫星， 与上述导航卫星在同一导航系统中的其他导航卫星为非静止轨道卫星。 优选地， 上述导航卫星通过以下方式广播多个上述电离层延迟修正参数集： 上述 导航卫星对多个上述电离层延迟修正参数集中的部分或全部电离层延迟修正参数集加 密后再广播。 优选地， 上述导航卫星通过导航电文广播多个上述电离层延迟修正参数集包括： 上述导航卫星在相同或不同的广播信道中广播不同的电离层延迟修正参数集， 其中， 不同的广播信道对应不同的频点。 根据本发明的另一方面， 提供了一种电离层延迟修正参数的传递装置， 其包括： 获取模块， 设置为获取多个电离层延迟修正参数集， 其中， 每个上述电离层延迟修正 参数集对应有适用地区范围； 广播模块， 设置为通过导航电文广播多个上述电离层延 迟修正参数集。 根据本发明的又一方面， 提供了一种导航卫星， 其包括上述任意一种电离层延迟 修正参数的传递装置。 在本发明上述实施例中， 导航卫星获取多个电离层延迟修正参数集， 其中， 该多 个电离层延迟修正参数集中的每个电离层延迟修正参数集都对应有适用地区范围， 上 述导航卫星并通过导航电文广播上述多个电离层延迟修正参数集， 以使得可以针对不 同的地理区域选择与地理区域相适应的电离层延迟修正参数集来对电离层延迟进行修 正， 进而体现了不同地理区域电离层延迟特性， 从而提高了定位精度。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部分， 本发 明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的不当限定。 在附图 中- 图 1是根据本发明实施例的电离层延迟修正参数的传递方法的流程图； 图 2 是根据本发明实施例的电离层延迟参数的传递方法的网络结构示意图 1 ; 图 3是根据本发明实施例的电离层延迟参数的传递方法的网络结构示意图 2; 图 4是根据本发明实施例的电离层延迟修正参数的传递装置的结构框图； 图 5是根据本发明实施例的另一种电离层延迟修正参数的传递装置的结构框图； 图 6 是根据本发明实施例的电离层延迟修正参数的传递方法的另一种处理流 程图； 以及 图 7 是根据本发明实施例的电离层延迟修正参数的传递方法的又一种处理流程 图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在不冲突的 情况下， 本申请中的实施例及实施例中的特征可以相互组合。 在本实施例中， 提供了一种电离层延迟修正参数的传递方法， 如图 1所示， 该电 离层延迟修正参数的传递方法包括步骤 S102至步骤 S104。 步骤 S102: 导航卫星获取多个电离层延迟修正参数集， 其中， 每个电离层延迟修 正参数集对应有适用地区范围。 步骤 S104: 导航卫星通过导航电文广播多个电离层延迟修正参数集。 通过上述步骤， 导航卫星获取多个电离层延迟修正参数集， 其中， 该多个电离层 延迟修正参数集中的每个电离层延迟修正参数集都对应有适用地区范围， 上述导航卫 星并通过导航电文广播上述多个电离层延迟修正参数集， 以使得可以针对不同的地理 区域选择与地理区域相适应的电离层延迟修正参数集来对电离层延迟进行修正， 进而 体现了不同地理区域电离层延迟特性， 从而提高了定位精度。 优选地， 上述导航卫星可以是导航系统中任意类型的卫星， 例如， 既可以是静止 轨道卫星， 也可以是非静止轨道卫星。 为了满足不同应用场景的需求， 在本优选实施例中， 上述导航卫星可以通过以下 至少之一方式获取多个上述电离层延迟修正参数集： 上述导航卫星从地面控制站获取 多个上述电离层延迟修正参数集； 上述导航卫星从除了该导航卫星之外的其他导航卫 星获取多个上述电离层延迟修正参数集， 其中， 上述导航卫星和上述其他导航卫星属 于同一导航系统。 优选地， 如图 2所示的电离层延迟参数的传递方法的网络结构示意图 1， 本优选 实施例涉及到的网络实体可以包括： 导航卫星、 地面控制站和终端。 在图 2中， 导航 卫星均从地面控制站获取电离层延迟修正参数集， 该导航卫星可以是静止轨道卫星， 也可以是非静止轨道卫星， 均将获取的电离层延迟修正参数集发送给终端， 其中， 地 面控制站可以有多个， 导航卫星保存的多个电离层延迟修正参数集可能来自于不同的 地面控制站。 优选地， 在本优选实施例中， 上述导航卫星从上述地面控制站获取多个上述电离 层延迟修正参数集包括： 上述导航卫星从相同或不同的地面控制站获取不同的电离层 延迟修正参数集， 其中， 上述电离层延迟修正参数集是上述地面控制站通过对电离层 的检测和 /或对电离层的历史数据分析得到的。 即上述地面控制站通过对电离层的检测 和 /或对电离层的历史数据分析（可以对导航卫星广播的电离层延迟修正参数集进行更 新） 得到多个上述电离层延迟修正参数集， 并通过上行信道将多个上述电离层延迟修 正参数集发送给导航卫星。 优选地， 在本优选实施中， 上述地面控制站是坐落在地面且与导航卫星通信的站 点， 其中， 上述地面控制站可以包括但不限于以下类型的站点： 主控站、 注入站、 监 测站。 为了进一步提高定位精度， 在本优选实施例中， 上述导航电文还可以包括以下至 少之一信息： 每个上述电离层延迟修正参数集对应的适用地区范围信息、 每个上述电 离层延迟修正参数集适用的电离层模型， 其中， 不同的电离层模型对应不同的电离层 延迟计算方法。 即在上述导航电文中指示每个电离层延迟修正参数集对应的适用地区 范围和适用的电离层模型， 以便终端可以准确地、 便捷地根据以地理区域相应的电离 层延迟修正参数和电离层模型计算电离层延迟， 以进一步提高不同地理区域的定位精 度。 为了提高本优选实施例的灵活性， 以满足不同应用场景的需求， 在本优选实施例 中， 提供了另一种确定每个电离层延迟修正参数集对应的适用地区范围和适用的电离 层模型的方法， 例如， 上述导航卫星通过以下步骤确定每个上述电离层延迟修正参数 集对应的适用地区范围信息和适用的电离层模型： 上述导航卫星根据每个电离层延迟 修正参数集在上述导航电文中的顺序或位置协议约定每个上述电离层延迟修正参数集 对应的适用地区范围信息和适用的电离层模型。 例如， 以根据每个电离层延迟修正参 数集在上述导航电文中的顺序来协议约定每个上述电离层延迟修正参数集对应的适用 地区范围信息和适用的电离层模型为例， 约定在上述导航电文中按出现顺序第一个电 离层延迟修正参数集是适用于全球范围的并采用 KLOBUCHAR模型的， 第二个电离 层延迟修正参数集是适用于亚洲范围的并采用增强型 KLOBUCHAR模型的。 为了可以针对不同的地理区域选择与地理区域相适应的电离层延迟修正参数集来 对电离层延迟进行修正， 在本优选实施例中， 不同的电离层延迟修正参数集对应相同 或不同的适用地区范围。 即不同的电离层延迟修正参数集对应相同或不同的适用地区 范围， 当两个电离层延迟修正参数集对应的适用地区范围相同时， 两个电离层延迟修 正参数集可以采用不同的电离层模型， 以通过不同的电离延迟计算方法来针对性地进 行电离层延迟修正。 为了适应多种应用场景， 在本优选实施例中， 不同的电离层延迟修正参数集可以 具备以下至少之一特征：不同的电离层延迟修正参数集对应相同或不同的电离层模型； 不同的电离层延迟修正参数集包含参数的个数相同或不同； 不同的电离层延迟修正参 数集的参数取值相同或不同。 即上述多个电离层延迟修正参数集可以对应一种电离层 模型或者分别对应不同的电离层模型， 也可以包括相同或不同个参数， 参数取值也可 以相同或不同。 优选地， 上述电离层模型可以包括但不限于以下几种模型： 例如， KLOBUCHAR 模型， NeQuick模型， 增强型 KLOBUCHAR模型。 为了普遍性地提高定位精度， 在本优选实施例中， 上述导航卫星通过上述导航电 文广播多个上述电离层延迟修正参数集包括： 上述导航卫星通过上述导航电文将多个 上述电离层延迟修正参数集广播给终端和 /或与上述导航卫星在同一导航系统中的其 他导航卫星。 优选地， 在本优选实施例中， 在上述导航卫星通过上述导航电文将多个上述电离 层延迟修正参数集广播给与上述导航卫星在同一导航系统中的其他导航卫星的情况 下， 上述导航卫星为静止轨道卫星， 与上述导航卫星在同一导航系统中的其他导航卫 星为非静止轨道卫星。 优选地， 图 3是根据本发明实施例的电离层延迟参数的传递方法的网络结构示意 图 2， 如图 3所示， 本实施例涉及到的网络实体可以包括： 导航卫星、 地面控制站和 终端。 在图 3中， 上述广播多个上述电离层延迟修正参数集的导航卫星为静止轨道卫 星， 该静止轨道卫星从地面控制站获取电离层延迟修正参数集后转发给非静止轨道卫 星和终端。 其中， 地面控制站可以有多个， 导航卫星保存的多个电离层延迟修正参数 集可能来自于不同的地面控制站。 优选地， 在本优选实施例中， 上述导航卫星可以采用不同的安全性策略来广播多 个上述电离层延迟修正参数集， 例如， 上述导航卫星通过以下方式广播多个上述电离 层延迟修正参数集： 上述导航卫星对多个上述电离层延迟修正参数集中的部分或全部 电离层延迟修正参数集加密后再广播。 即可以根据不同需要采用不同的安全性策略来 广播多个上述电离层延迟修正参数集， 对多个上述电离层延迟修正参数集中的部分电 离层延迟修正参数集不加密， 供所有用户免费使用； 对多个上述电离层延迟修正参数 集中的另一部分电离层延迟修正参数集加密， 供某些特权用户使用， 以获得更高的定 位精度。 优选地， 在本优选实施例中， 上述导航卫星通过上述导航电文广播多个上述电离 层延迟修正参数集包括： 上述导航卫星在相同或不同的广播信道中广播不同的电离层 延迟修正参数集， 其中， 不同的广播信道对应不同的频点。 即不同的电离层延迟修正 参数集可以在同一个卫星广播信道 (同一个频点)中广播， 也可以在不同的卫星广播信 道 (不同频点)中广播。 优选地， 上述导航卫星可以属于但不限于以下导航系统： 例如， 北斗卫星导航系 统， 全球定位系统（Global Position System, 简称为 GPS)， GALILEO, GLONASS (俄 语中的全球卫星导航系统， Global Naviga Tion Satellite Syste) 等导航系统。 在本优选实施例中， 提供了一种电离层延迟修正参数的传递装置， 如图 4所示， 该电离层延迟修正参数的传递装置包括： 获取模块 402， 设置为获取多个电离层延迟 修正参数集， 其中， 每个所述电离层延迟修正参数集对应有适用地区范围； 广播模块 404，连接至获取模块 402，设置为通过导航电文广播多个所述电离层延迟修正参数集。 在本优选实施例中， 获取模块 402获取多个电离层延迟修正参数集， 其中， 该多 个电离层延迟修正参数集中的每个电离层延迟修正参数集都对应有适用地区范围， 广 播模块 404通过导航电文广播上述多个电离层延迟修正参数集， 以使得可以针对不同 的地理区域选择与地理区域相适应的电离层延迟修正参数集来对电离层延迟进行修 正， 进而体现了不同地理区域电离层延迟特性， 从而提高了定位精度。 为了满足不同应用场景的需求， 在本优选实施例中， 上述获取模块 402可以通过 以下至少之一方式获取多个上述电离层延迟修正参数集： 从地面控制站获取多个上述 电离层延迟修正参数集； 从除了广播多个上述电离层延迟修正参数集的导航卫星之外 的其他导航卫星获取多个上述电离层延迟修正参数集， 其中， 上述导航卫星和上述其 他导航卫星属于同一导航系统。 优选地， 在本优选实施例中， 上述获取模块 402从相同或不同的地面控制站获取 不同的电离层延迟修正参数集， 其中， 上述电离层延迟修正参数集是上述地面控制站 通过对电离层的检测和 /或对电离层的历史数据分析得到的。 为了进一步提高定位精度， 在本优选实施例中， 上述广播模块 404广播的导航电 文还可以包括以下至少之一信息： 每个上述电离层延迟修正参数集对应的适用地区范 围信息、 每个上述电离层延迟修正参数集适用的电离层模型， 其中， 不同的电离层模 型对应不同的电离层延迟计算方法。 即在上述导航电文中指示每个电离层延迟修正参 数集对应的适用地区范围和适用的电离层模型， 以便终端可以准确地、 便捷地根据以 地理区域相应的电离层延迟修正参数和电离层模型计算电离层延迟， 以进一步提高不 同地理区域的定位精度。 为了提高本优选实施例的灵活性， 以满足不同应用场景的需求， 在本优选实施例 中， 如图 5所示， 上述电离层延迟修正参数的传递装置还包括： 约定模块 406， 设置 为通过以下步骤确定每个上述电离层延迟修正参数集对应的适用地区范围信息和适用 的电离层模型： 根据每个电离层延迟修正参数集在上述导航电文中的顺序或位置协议 约定每个上述电离层延迟修正参数集对应的适用地区范围信息和适用的电离层模型。 例如， 以根据每个电离层延迟修正参数集在上述导航电文中的顺序来协议约定每个上 述电离层延迟修正参数集对应的适用地区范围信息和适用的电离层模型为例， 约定在 上述导航电文中按出现顺序第一个电离层延迟修正参数集是适用于全球范围的并采用 KLOBUCHAR模型的，第二个电离层延迟修正参数集是适用于亚洲范围的并采用增强 型 KLOBUCHAR模型的。 为了普遍性地提高定位精度， 在本优选实施例中， 上述广播模块 404， 还设置为 通过上述导航电文将多个上述电离层延迟修正参数集广播给终端和 /或与广播上述导 航电文的导航卫星在同一导航系统中的其他导航卫星。 优选地， 在本优选实施例中， 在上述广播模块 404通过上述导航电文将多个上述 电离层延迟修正参数集广播给与广播上述导航电文的导航卫星在同一导航系统中的其 他导航卫星的情况下， 上述导航卫星为静止轨道卫星， 与上述导航卫星在同一导航系 统中的其他导航卫星为非静止轨道卫星。 优选地， 在本优选实施例中， 可以采用不同的安全性策略来广播多个上述电离层 延迟修正参数集， 例如， 上述广播模块 404通过以下方式广播多个上述电离层延迟修 正参数集： 对多个上述电离层延迟修正参数集中的部分或全部电离层延迟修正参数集 加密后再广播。 优选地， 在本优选实施例中， 上述广播模块 404， 还设置为不同的电离层延迟修 正参数集在相同或不同的广播信道中广播， 其中， 不同的广播信道对应不同的频点。 即不同的电离层延迟修正参数集可以在同一个卫星广播信道 (同一个频点)中广播， 也 可以在不同的卫星广播信道 (不同频点)中广播。 在本优选实施例中， 提供了一种优选的导航卫星， 该导航卫星包括上述任意一种 电离层延迟修正参数的传递装置。 以下结合附图对上述各个优选实施例进行详细地描述。 在本优选实施例中， 以通过协议约定来确定不同电离层延迟修正参数集的使用范 围为例， 图 6是根据本发明实施例的电离层延迟修正参数的传递方法的另一种处理流 程图， 如图 6所示， 该流程包括如下步骤： 步骤 S602: 地面控制站通过对电离层的检测和对电离层的历史数据的分析， 计算 出不同地区的电离层延迟修正参数集， 并将多个电离层延迟修正参数集通过上行信道 上传给导航卫星。 步骤 S604: 导航卫星将多个电离层延迟修正参数集在导航电文中广播， 并通过协 议约定电离延迟修正参数集的定义和适用范围， 在导航电文中的第一个电离层延迟修 正参数集包含 8个参数对应 KLOBUCHAR模型适用于全球范围； 第二个电离层延迟 修正参数集包含 14个参数对应增强型 KLOBUCHAR模型适用于亚洲地区。 步骤 S606: 终端收到上述导航电文后， 根据协议约定和用户设置判断出自己处在 亚洲地区， 则选用第二个电离层延迟修正参数集并利用增强型 KLOBUCHAR模型计 算电离层延迟； 如终端判断出自己不处于亚太地区， 则终端选用第一个电离层延迟修 正参数集并利用 KLOBUCHAR模型计算电离层延迟。 优选地，在步骤 S602中，第一个电离层延迟修正参数集和第二个电离层延迟修正 参数集可以由不同的地面控制站提供。 优选地，在步骤 S604中，第二个电离层延迟修正参数集可以采用加密的方式传输， 仅供授权用户使用， 当然， 这只是优选示例， 上述第一个电离层延迟修正参数集也可 以根据不同需求选择加密或不加密的方式传输。 优选地，在步骤 S604中，不同的电离层延迟修正参数集集可以在同一个卫星广播 信道 （相同的频点） 中广播， 也可以在不同的卫星广播信道 （不同的频点） 中广播。 在本优选实施例中， 以通过协议约定来确定不同电离层延迟修正参数集的使用范 围为例， 图 7是根据本发明实施例的电离层延迟修正参数的传递方法的又一种处理流 程图， 如图 7所示， 该流程包括如下步骤： 步骤 S702: 地面控制站通过对电离层的检测和对电离层的历史数据的分析， 计算 出不同地区的电离层延迟修正参数集， 并将多个电离层延迟修正参数集通过上行信道 上传给导航卫星。 步骤 S704: 导航卫星将多个电离层延迟修正参数集在导航电文中广播， 同时还在 上述导航电文中指出每个电离层延迟修正参数集的适用范围 （适用区域范围） 和对应 的电离层模型。 例如， 包括如下信息： 电离层延迟修正参数集 A (包含 8个参数)及其对应的模型为 KLOBUCHAR模型， 电离层延迟修正参数集 A对应的适用范围指示信息， 指示其的适用区域范围为全 球， 电离层延迟修正参数集 B(包含 14个参数)及其对应的模型为增强型 KLOBUCHAR 模型， 电离层延迟修正参数集 B对应的适用范围指示信息， 指示其的适用区域范围为亚 太地区； 步骤 S706: 终端收到上述导航电文后， 根据导航电文中的电离层延迟修正参数集 对应的适用区域范围和用户设置判断出自己处在亚洲地区， 则选用电离层延迟修正参 数集 B并利用增强型 KLOBUCHAR模型计算电离层延迟； 如终端判断出自己不处于 亚太地区， 则终端选用电离层延迟修正参数集集 A并利用 KLOBUCHAR模型计算电 离层延迟。 优选地，在步骤 S702中，第一个电离层延迟修正参数集集和第二个电离层延迟修 正参数集集可以由不同的地面控制站提供。 优选地， 在步骤 S704中， 电离层延迟修正参数集 A相关信息在卫星信道 1中进 行广播， 卫星信道 1不进行加密； 电离层延迟修正参数集 B相关信息在卫星信道 2中 进行广播， 卫星信道 2进行加密。 从以上的描述中， 可以看出， 上述优选实施例实现了如下技术效果： 获取多个电 离层延迟修正参数集， 其中， 该多个电离层延迟修正参数集中的每个电离层延迟修正 参数集对应不同的适用地区范围， 并通过导航电文广播上述多个电离层延迟修正参数 集， 以使得可以针对不同的地理区域选择与地理区域相适应的电离层延迟修正参数集 来计算电离层延迟，进而体现了不同地理区域电离层延迟特性， 从而提高了定位精度。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多个计算装置所 组成的网络上， 可选地， 它们可以用计算装置可执行的程序代码来实现， 从而， 可以 将它们存储在存储装置中由计算装置来执行， 并且在某些情况下， 可以以不同于此处 的顺序执行所示出或描述的步骤， 或者将它们分别制作成各个集成电路模块， 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技 术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的 任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。 TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method, device, and navigation satellite for transmitting ionospheric delay correction parameters. BACKGROUND OF THE INVENTION The BeiDou (COMPASS) Navigation Satellite System is a self-developed, independently operating global satellite navigation system being implemented in China. Beidou satellite navigation system is committed to providing high quality positioning, navigation and timing services to users around the world, including open service and authorized service. The open service provides free positioning, speed measurement and timing service to the world. The positioning accuracy is 10 meters, the speed measurement accuracy is 0.2 m/s, and the timing accuracy is 10 nanoseconds. The Authorized Service provides positioning, speed measurement, timing and communication services, and system integrity information for users with high-precision, highly reliable satellite navigation needs. The Beidou satellite navigation system consists of three parts: the space segment, the ground segment and the user segment. The space segment includes five geostationary orbit satellites and 30 non-geostationary orbit satellites. The ground segment includes several ground stations, such as the main control station, the injection station and the monitoring station. The user segment includes a Beidou user terminal and a terminal compatible with other satellite navigation systems. Satellite navigation system is an important spatial information infrastructure. It has been widely used in many fields such as surveying and mapping, telecommunications, water conservancy, fishery, transportation, forest fire prevention, disaster reduction and public security, and military. It is closely related to national security. An important indicator for measuring satellite positioning performance is positioning accuracy, and the accuracy of satellite positioning systems is closely related to the space environment. As an important environmental factor, ionospheric delay is one of the serious error sources of satellite navigation technology. Can it effectively eliminate or reduce the accuracy and reliability of ionospheric delay error related to satellite navigation terminal positioning. At present, navigation satellite systems such as GPS and Galileo broadcast ionospheric delay correction parameters in navigation messages for ionospheric delay correction. The ionospheric delay correction parameters are valid for all users (all regions) in the world. Considering that the geographical environment of different regions on the earth is quite different, and the huge difference in geographical environment will lead to significant differences in ionospheric characteristics, using the same ionospheric model and ionospheric delay correction parameters globally will not be accurate. The ionospheric delay characteristics of different regions are reflected, which makes it impossible to accurately calculate the ionospheric delay, thus affecting the final positioning accuracy. Regarding the problem of at least one of the above-mentioned related art, an effective solution has not yet been proposed. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, a device, and a navigation satellite for transmitting ionospheric delay correction parameters, so as to at least solve the positioning accuracy caused by using the same ionospheric model and ionospheric delay correction parameters in the related art in the related art. Low problem. According to an aspect of the present invention, a method for transmitting an ionospheric delay correction parameter is provided, the method comprising: acquiring, by a navigation satellite, a plurality of ionospheric delay correction parameter sets, wherein each of the ionospheric delay correction parameter sets corresponds to a applicable region Range; the navigation satellite broadcasts a plurality of the above-mentioned ionospheric delay correction parameter sets through a navigation message. Preferably, the navigation satellite acquires a plurality of the ionospheric delay correction parameter sets by at least one of: the navigation satellite acquires a plurality of the ionospheric delay correction parameter sets from the ground control station; and the navigation satellites are from the navigation satellites except The other navigation satellites acquire a plurality of the above-mentioned ionospheric delay correction parameter sets, wherein the navigation satellites and the other navigation satellites belong to the same navigation system. Preferably, the acquiring, by the navigation satellite, the plurality of ionospheric delay correction parameter sets from the ground control station comprises: acquiring, by the navigation satellites, different sets of ionospheric delay correction parameters from the same or different ground control stations, wherein the ionospheric delay is The modified parameter set is obtained by the above ground control station by detecting the ionosphere and/or analyzing historical data of the ionosphere. Preferably, the ground control station is a station located on the ground and communicating with the navigation satellite, wherein the ground control station comprises: a main control station, an injection station, and a monitoring station. Preferably, the navigation message further includes at least one of the following: an applicable region range information corresponding to each of the ionospheric delay correction parameter sets, and an ionospheric model applicable to each of the ionospheric delay correction parameter sets, wherein different ionizations The layer model corresponds to different ionospheric delay calculation methods. Preferably, the navigation satellite determines the applicable region range information and the applicable ionospheric model corresponding to each of the ionospheric delay correction parameter sets by the following steps: the navigation satellite is configured in the navigation message according to each of the above-mentioned ionospheric delay correction parameter sets. The order or location of the agreement, the applicable area range information corresponding to each of the above-mentioned ionospheric delay correction parameter sets and the applicable ionospheric model. Preferably, different sets of ionospheric delay correction parameters correspond to the same or different applicable region ranges. Preferably, the different ionospheric delay correction parameter sets have at least one of the following characteristics: different ionospheric delay correction parameter sets correspond to the same or different ionospheric models; different ionospheric delay correction parameter sets include the same number of parameters or Different; the parameters of different ionospheric delay correction parameter sets are the same or different. Preferably, the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets by using the navigation message: the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets to the terminal by using the navigation message, and/or is in the same navigation as the navigation satellite. Other navigation satellites in the system. Preferably, when the navigation satellite broadcasts a plurality of the above-mentioned ionospheric delay correction parameter sets to other navigation satellites in the same navigation system as the navigation satellite by using a navigation message, the navigation satellite is a geostationary satellite, and the navigation Other navigation satellites of the satellite in the same navigation system are non-geostationary orbit satellites. Preferably, the navigation satellite broadcasts a plurality of the ionospheric delay correction parameter sets by: the navigation satellite encrypts and then broadcasts part or all of the ionospheric delay correction parameter sets of the plurality of ionospheric delay correction parameter sets. Preferably, the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets by using the navigation message: the navigation satellite broadcasts different ionospheric delay correction parameter sets in the same or different broadcast channels, wherein different broadcast channels correspond to different Frequency point. According to another aspect of the present invention, there is provided an apparatus for transmitting ionospheric delay correction parameters, comprising: an acquisition module configured to acquire a plurality of ionospheric delay correction parameter sets, wherein each of said ionospheric delay correction parameter sets Corresponding to the applicable area range; the broadcast module is configured to broadcast a plurality of the above-mentioned ionospheric delay correction parameter sets by the navigation message. According to still another aspect of the present invention, there is provided a navigation satellite comprising any of the above-described ionospheric delay correction parameter transfer means. In the above embodiment of the present invention, the navigation satellite acquires a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set in the plurality of ionospheric delay correction parameter sets corresponds to an applicable regional range, and the navigation satellite And broadcasting the plurality of ionospheric delay correction parameter sets by using a navigation message, so that the ionospheric delay correction parameter set adapted to the geographical area can be selected for different geographical regions to correct the ionospheric delay, thereby reflecting different geographical regions. The ionospheric delay characteristics improve positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings - FIG. 1 is a flow chart of a method for transmitting ionospheric delay correction parameters according to an embodiment of the present invention; 2 is a schematic diagram of a network structure of a method for transmitting ionospheric delay parameters according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a network structure of a method for transmitting ionospheric delay parameters according to an embodiment of the present invention; FIG. FIG. 5 is a block diagram showing the structure of another apparatus for transmitting ionospheric delay correction parameters according to an embodiment of the present invention; FIG. 6 is an ionosphere according to an embodiment of the present invention. Another processing flowchart of the method for transmitting the delay correction parameter; and FIG. 7 is still another processing flowchart of the method for transmitting the ionospheric delay correction parameter according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. In this embodiment, a method for transmitting an ionospheric delay correction parameter is provided. As shown in FIG. 1, the method for transmitting the ionospheric delay correction parameter includes steps S102 to S104. Step S102: The navigation satellite acquires a plurality of ionospheric delay correction parameter sets, where each ionospheric delay correction parameter set corresponds to an applicable region range. Step S104: The navigation satellite broadcasts a plurality of ionospheric delay correction parameter sets through the navigation message. Through the above steps, the navigation satellite acquires a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set of the plurality of ionospheric delay correction parameter sets corresponds to a applicable region range, and the navigation satellite passes the navigation message Broadcasting the plurality of ionospheric delay correction parameter sets to enable the ionospheric delay correction parameter set to be adapted to different geographical regions to correct the ionospheric delay, thereby embodying the ionospheric delay characteristics of different geographical regions. , thereby improving the positioning accuracy. Preferably, the navigation satellite may be any type of satellite in the navigation system, for example, it may be a geostationary satellite or a non-stationary orbit satellite. In order to meet the requirements of different application scenarios, in the preferred embodiment, the navigation satellite may acquire a plurality of the ionospheric delay correction parameter sets by at least one of the following: the navigation satellite acquires a plurality of the ionospheric delays from the ground control station. Correcting the parameter set; the above navigation satellites are from other navigational satellites other than the navigation satellite The star acquires a plurality of the above-described ionospheric delay correction parameter sets, wherein the navigation satellite and the other navigation satellites belong to the same navigation system. Preferably, the network structure diagram 1 of the method for transmitting the ionospheric delay parameter shown in FIG. 2, the network entity involved in the preferred embodiment may include: a navigation satellite, a ground control station, and a terminal. In FIG. 2, the navigation satellites obtain the ionospheric delay correction parameter set from the ground control station, and the navigation satellite may be a geostationary orbit satellite or a non-geostationary orbit satellite, and the acquired ionospheric delay correction parameter set is sent to the terminal. There may be multiple ground control stations, and multiple sets of ionospheric delay correction parameters saved by the navigation satellite may come from different ground control stations. Preferably, in the preferred embodiment, the acquiring, by the navigation satellite, the plurality of ionospheric delay correction parameter sets from the ground control station comprises: acquiring, by the navigation satellites, different ionospheric delay correction parameter sets from the same or different ground control stations. The ionospheric delay correction parameter set is obtained by the ground control station by detecting the ionosphere and/or analyzing historical data of the ionosphere. That is, the ground control station obtains a plurality of the above-mentioned ionospheric delay correction parameter sets by detecting the ionosphere and/or analyzing historical data of the ionosphere (which can update the ionospheric delay correction parameter set of the navigation satellite broadcast). The uplink channel transmits a plurality of the above-described ionospheric delay correction parameter sets to the navigation satellite. Preferably, in the preferred implementation, the ground control station is a station located on the ground and communicating with the navigation satellite, wherein the ground control station may include but is not limited to the following types of stations: a main control station, an injection station, and a monitoring station. . In order to further improve the positioning accuracy, in the preferred embodiment, the navigation message may further include at least one of the following: applicable region range information corresponding to each of the ionospheric delay correction parameter sets, and each of the ionospheric delay correction parameter sets. A suitable ionospheric model, in which different ionospheric models correspond to different ionospheric delay calculation methods. That is, in the above navigation message, the applicable region range and the applicable ionospheric model corresponding to each ionospheric delay correction parameter set are indicated, so that the terminal can accurately and conveniently correct the parameters and the ionospheric model according to the corresponding ionospheric delay in the geographical region. The ionospheric delay is calculated to further improve the positioning accuracy of different geographical regions. In order to improve the flexibility of the preferred embodiment to meet the needs of different application scenarios, in the preferred embodiment, another applicable region range and a suitable ionospheric model for determining each ionospheric delay correction parameter set are provided. The method, for example, the navigation satellite determines the applicable region range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets by the following steps: the navigation satellite is configured according to each ionospheric delay correction parameter set in the navigation message The sequence or location protocol in the convention stipulates the applicable region range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets. For example, to correct the parameters according to each ionosphere delay The order of the number set in the above navigation message is to agree on the applicable area range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets, and the first ionosphere in the order of appearance in the above navigation message is agreed upon. The delay correction parameter set is globally applicable and uses the KLOBUCHAR model. The second ionospheric delay correction parameter set is applicable to the Asian range and uses the enhanced KLOBUCHAR model. In order to be able to correct the ionospheric delay by selecting a set of ionospheric delay correction parameters adapted to the geographical area for different geographical regions, in the preferred embodiment, different ionospheric delay correction parameter sets correspond to the same or different applicable regions. range. That is, different ionospheric delay correction parameter sets correspond to the same or different applicable region ranges. When the two ionospheric delay correction parameter sets correspond to the same applicable region range, the two ionospheric delay correction parameter sets can adopt different ionospheric models. To perform ionospheric delay correction in a targeted manner by different ionization delay calculation methods. In order to adapt to various application scenarios, in the preferred embodiment, different ionospheric delay correction parameter sets may have at least one of the following features: different ionospheric delay correction parameter sets correspond to the same or different ionospheric models; different ionization The layer delay correction parameter set contains the same or different number of parameters; the parameters of different ionospheric delay correction parameter sets are the same or different. That is, the plurality of ionospheric delay correction parameter sets may correspond to one ionospheric model or respectively correspond to different ionospheric models, or may include the same or different parameters, and the parameter values may be the same or different. Preferably, the ionospheric model described above may include, but is not limited to, the following models: for example, a KLOBUCHAR model, a NeQuick model, and an enhanced KLOBUCHAR model. In the preferred embodiment, the navigation satellite broadcasts the plurality of ionospheric delay correction parameter sets by using the navigation message: the navigation satellite delays the plurality of ionospheric delay correction parameters by using the navigation message. The set is broadcast to the terminal and/or other navigation satellites in the same navigation system as the navigation satellite described above. Preferably, in the preferred embodiment, in the case that the navigation satellite broadcasts a plurality of the ionospheric delay correction parameter sets to the other navigation satellites in the same navigation system as the navigation satellite by using the navigation message, the navigation satellite For geostationary orbit satellites, other navigation satellites in the same navigation system as the above-mentioned navigation satellites are non-geostationary orbit satellites. Preferably, FIG. 3 is a schematic diagram of a network structure of a method for transmitting an ionospheric delay parameter according to an embodiment of the present invention. As shown in FIG. 3, the network entity involved in this embodiment may include: a navigation satellite, a ground control station, and a terminal. . In FIG. 3, the navigation satellite that broadcasts the plurality of ionospheric delay correction parameter sets is a geostationary orbit satellite, and the geostationary orbit satellite acquires an ionospheric delay correction parameter set from a ground control station and forwards it to a non-stationary orbital satellite. Star and terminal. There may be multiple ground control stations, and multiple sets of ionospheric delay correction parameters saved by the navigation satellite may come from different ground control stations. Preferably, in the preferred embodiment, the navigation satellite may broadcast a plurality of the above-mentioned ionospheric delay correction parameter sets by using different security policies. For example, the navigation satellite broadcasts a plurality of the above-mentioned ionospheric delay correction parameter sets by: The navigation satellite encrypts and then broadcasts part or all of the ionospheric delay correction parameter sets in the plurality of ionospheric delay correction parameter sets. That is, different security policies may be used to broadcast a plurality of the above-mentioned ionospheric delay correction parameter sets according to different needs, and the partial ionospheric delay correction parameter sets of the plurality of ionospheric delay correction parameter sets are not encrypted, and are freely used by all users; Another part of the ionospheric delay correction parameter set in the above-mentioned ionospheric delay correction parameter set is encrypted for use by some privileged users to obtain higher positioning accuracy. Preferably, in the preferred embodiment, the navigation satellite broadcasts the plurality of ionospheric delay correction parameter sets by using the navigation message: the navigation satellite broadcasts different ionospheric delay correction parameter sets in the same or different broadcast channels, Among them, different broadcast channels correspond to different frequency points. That is, different ionospheric delay correction parameter sets can be broadcast in the same satellite broadcast channel (same frequency point) or in different satellite broadcast channels (different frequency points). Preferably, the above navigation satellite may belong to, but is not limited to, the following navigation systems: for example, Beidou satellite navigation system, Global Position System (GPS), GALILEO, GLONASS (Global Satellite Navigation System in Russian, Global Naviga Tion Satellite Syste) and other navigation systems. In the preferred embodiment, a transfer device for ionospheric delay correction parameters is provided. As shown in FIG. 4, the ionospheric delay correction parameter transfer device includes: an acquisition module 402 configured to acquire a plurality of ionospheric delay corrections. a parameter set, wherein each of the ionospheric delay correction parameter sets corresponds to a applicable region range; the broadcast module 404 is coupled to the acquisition module 402, and configured to broadcast a plurality of the ionospheric delay correction parameter sets by using a navigation message. In the preferred embodiment, the obtaining module 402 acquires a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set in the plurality of ionospheric delay correction parameter sets corresponds to a applicable area range, and the broadcast module 404 The plurality of ionospheric delay correction parameter sets are broadcasted by the navigation message, so that the ionospheric delay correction parameter set adapted to the geographical area can be selected for different geographical regions to correct the ionospheric delay, thereby reflecting the ionization of different geographical regions. Layer delay characteristics, which improve positioning accuracy. In order to meet the requirements of different application scenarios, in the preferred embodiment, the acquiring module 402 may obtain multiple sets of the ionospheric delay correction parameters by using at least one of the following methods: acquiring a plurality of the ionospheric delay correction parameters from the ground control station. Set; from a navigation satellite other than broadcasting a plurality of the above-described ionospheric delay correction parameter sets The other navigation satellites acquire a plurality of the above-mentioned ionospheric delay correction parameter sets, wherein the navigation satellites and the other navigation satellites belong to the same navigation system. Preferably, in the preferred embodiment, the obtaining module 402 obtains different sets of ionospheric delay correction parameters from the same or different ground control stations, wherein the ionospheric delay correction parameter set is that the ground control station passes the ionosphere Detection and/or analysis of historical data from the ionosphere. In order to further improve the positioning accuracy, in the preferred embodiment, the navigation message broadcast by the broadcast module 404 may further include at least one of the following: applicable area range information corresponding to each of the ionospheric delay correction parameter sets, each of the above ionizations. The ionospheric model is applicable to the layer delay correction parameter set, wherein different ionospheric models correspond to different ionospheric delay calculation methods. That is, in the above navigation message, the applicable region range and the applicable ionospheric model corresponding to each ionospheric delay correction parameter set are indicated, so that the terminal can accurately and conveniently correct the parameters and the ionospheric model according to the corresponding ionospheric delay in the geographical region. The ionospheric delay is calculated to further improve the positioning accuracy of different geographical regions. In order to improve the flexibility of the preferred embodiment to meet the requirements of different application scenarios, in the preferred embodiment, as shown in FIG. 5, the apparatus for transmitting the ionospheric delay correction parameter further includes: an appointment module 406, configured to pass The following steps determine the applicable region range information and the applicable ionospheric model corresponding to each of the above-mentioned ionospheric delay correction parameter sets: each of the above ionosphere is defined according to the sequence or position protocol of each ionospheric delay correction parameter set in the above navigation message The applicable region range information corresponding to the delay correction parameter set and the applicable ionosphere model. For example, the applicable area range information corresponding to each of the above-mentioned ionospheric delay correction parameter sets and the applicable ionospheric model are exemplified by the order of each ionospheric delay correction parameter set in the above-mentioned navigation message, and the navigation is as follows. The first ionospheric delay correction parameter set in the order of appearance is applicable to the global scale and adopts the KLOBUCHAR model. The second ionospheric delay correction parameter set is applicable to the Asian scope and adopts the enhanced KLOBUCHAR model. In a preferred embodiment, the broadcast module 404 is further configured to broadcast, by using the navigation message, a plurality of the ionospheric delay correction parameter sets to the terminal and/or to broadcast the navigation message. Satellites are other navigation satellites in the same navigation system. Preferably, in the preferred embodiment, the broadcast module 404 broadcasts, by using the navigation message, a plurality of the ionospheric delay correction parameter sets to other navigation satellites in the same navigation system as the navigation satellites that broadcast the navigation message. The navigation satellite is a geostationary orbit satellite, and the other navigation satellites in the same navigation system as the navigation satellite are non-stationary orbit satellites. Preferably, in the preferred embodiment, a plurality of the above-mentioned ionospheric delay correction parameter sets may be broadcasted by using different security policies. For example, the above broadcast module 404 broadcasts a plurality of the above-mentioned ionospheric delay repairs in the following manner. Positive parameter set: Some or all of the ionospheric delay correction parameter sets in the above-mentioned ionospheric delay correction parameter set are encrypted and then broadcast. Preferably, in the preferred embodiment, the broadcast module 404 is further configured to broadcast different sets of ionospheric delay correction parameters in the same or different broadcast channels, wherein different broadcast channels correspond to different frequency points. That is, different ionospheric delay correction parameter sets can be broadcast in the same satellite broadcast channel (same frequency point) or in different satellite broadcast channels (different frequency points). In the preferred embodiment, a preferred navigation satellite is provided, the navigation satellite comprising any of the above described ionospheric delay correction parameters. The above various preferred embodiments are described in detail below with reference to the accompanying drawings. In the preferred embodiment, the use range of different ionospheric delay correction parameter sets is determined by a protocol convention. FIG. 6 is another processing flowchart of the ionospheric delay correction parameter transmission method according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps: Step S602: The ground control station calculates the ionospheric delay correction parameter set of different regions by detecting the ionosphere and analyzing the historical data of the ionosphere, and The ionospheric delay correction parameter set is uploaded to the navigation satellite through the uplink channel. Step S604: The navigation satellite broadcasts a plurality of ionospheric delay correction parameter sets in the navigation message, and defines and applies a range of ionization delay correction parameter sets by a protocol, and the first ionospheric delay correction parameter set in the navigation message includes The 8 parameters corresponding to the KLOBUCHAR model are applicable to the global scope; the second ionospheric delay correction parameter set contains 14 parameters corresponding to the enhanced KLOBUCHAR model for the Asian region. Step S606: After receiving the navigation message, the terminal determines that it is in the Asian region according to the protocol agreement and the user setting, and selects the second ionospheric delay correction parameter set and uses the enhanced KLOBUCHAR model to calculate the ionospheric delay; If the user is not in the Asia-Pacific region, the terminal selects the first ionospheric delay correction parameter set and uses the KLOBUCHAR model to calculate the ionospheric delay. Preferably, in step S602, the first ionospheric delay correction parameter set and the second ionospheric delay correction parameter set may be provided by different ground control stations. Preferably, in step S604, the second ionospheric delay correction parameter set may be transmitted in an encrypted manner for use by an authorized user. Of course, this is only a preferred example, and the first ionospheric delay correction parameter set may also be based on Different requirements are selected to be transmitted in encrypted or unencrypted mode. Preferably, in step S604, different sets of ionospheric delay correction parameters may be broadcast in the same satellite broadcast channel (same frequency point) or in different satellite broadcast channels (different frequency points). In the preferred embodiment, the use range of different ionospheric delay correction parameter sets is determined by a protocol convention, and FIG. 7 is another processing flowchart of the ionospheric delay correction parameter transmission method according to an embodiment of the present invention. As shown in FIG. 7, the process includes the following steps: Step S702: The ground control station calculates the ionospheric delay correction parameter set in different regions by detecting the ionosphere and analyzing the historical data of the ionosphere, and The ionospheric delay correction parameter set is uploaded to the navigation satellite through the uplink channel. Step S704: The navigation satellite broadcasts a plurality of ionospheric delay correction parameter sets in the navigation message, and also indicates the applicable range (applicable region range) of each ionospheric delay correction parameter set and the corresponding ionospheric model in the navigation message. . For example, the following information is included: The ionospheric delay correction parameter set A (including 8 parameters) and its corresponding model are the KLOBUCHAR model, and the ionospheric delay correction parameter set A corresponds to the applicable range indication information, indicating that the applicable area range is global. The ionospheric delay correction parameter set B (including 14 parameters) and its corresponding model are enhanced KLOBUCHAR models, and the ionospheric delay correction parameter set B corresponding to the applicable range indication information, indicating that the applicable area range is the Asia-Pacific region; S706: After receiving the navigation message, the terminal determines, according to the applicable area range and user setting corresponding to the ionospheric delay correction parameter set in the navigation message, that the location is in the Asian region, and selects the ionospheric delay correction parameter set B and uses the enhanced type. The KLOBUCHAR model calculates the ionospheric delay; if the terminal determines that it is not in the Asia-Pacific region, the terminal selects the ionospheric delay correction parameter set A and uses the KLOBUCHAR model to calculate the ionospheric delay. Preferably, in step S702, the first ionospheric delay correction parameter set and the second ionospheric delay correction parameter set may be provided by different ground control stations. Preferably, in step S704, the ionospheric delay correction parameter set A related information is broadcasted in the satellite channel 1, the satellite channel 1 is not encrypted; the ionospheric delay correction parameter set B related information is broadcast in the satellite channel 2, the satellite Channel 2 is encrypted. From the above description, it can be seen that the above preferred embodiment achieves the following technical effects: acquiring a plurality of ionospheric delay correction parameter sets, wherein each ionospheric delay correction parameter set in the plurality of ionospheric delay correction parameter sets Corresponding to different applicable area ranges, and broadcasting the plurality of ionospheric delay correction parameter sets by navigation message, so that the ionospheric delay correction parameter set adapted to the geographical area can be selected for different geographical regions to calculate the ionospheric delay, and then It reflects the ionospheric delay characteristics of different geographical regions, thus improving the positioning accuracy. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

权 利 要 求 书 Claim 1. 一种电离层延迟修正参数的传递方法， 包括： A method for transmitting an ionospheric delay correction parameter, comprising: 导航卫星获取多个电离层延迟修正参数集， 其中， 每个所述电离层延迟修 正参数集对应有适用地区范围；  The navigation satellite acquires a plurality of ionospheric delay correction parameter sets, wherein each of the ionospheric delay correction parameter sets corresponds to a applicable area range; 所述导航卫星通过导航电文广播多个所述电离层延迟修正参数集。  The navigation satellite broadcasts a plurality of the ionospheric delay correction parameter sets via a navigation message. 2. 根据权利要求 1所述的方法， 其中， 所述导航卫星通过以下至少之一方式获取 多个所述电离层延迟修正参数集： 2. The method according to claim 1, wherein the navigation satellite acquires a plurality of the ionospheric delay correction parameter sets by at least one of the following: 所述导航卫星从地面控制站获取多个所述电离层延迟修正参数集； 所述导航卫星从除了所述导航卫星之外的其他导航卫星获取多个所述电离 层延迟修正参数集， 其中， 所述导航卫星和所述其他导航卫星属于同一导航系 统。  Acquiring, by the navigation satellite, a plurality of the ionospheric delay correction parameter sets from a ground control station; the navigation satellite acquiring a plurality of the ionospheric delay correction parameter sets from other navigation satellites other than the navigation satellite, where The navigation satellite and the other navigation satellites belong to the same navigation system. 3. 根据权利要求 2所述的方法， 其中， 所述导航卫星从所述地面控制站获取多个 所述电离层延迟修正参数集包括： 3. The method according to claim 2, wherein the acquiring, by the navigation satellite, a plurality of the ionospheric delay correction parameter sets from the ground control station comprises: 所述导航卫星从相同或不同的地面控制站获取不同的电离层延迟修正参数 集， 其中， 所述电离层延迟修正参数集是所述地面控制站通过对电离层的检测 和 /或对电离层的历史数据分析得到的。  The navigation satellite acquires different sets of ionospheric delay correction parameters from the same or different ground control stations, wherein the ionospheric delay correction parameter set is the detection of the ionosphere by the ground control station and/or the ionosphere Historical data analysis obtained. 4. 根据权利要求 2所述的方法， 其中， 所述地面控制站是坐落在地面且与导航卫 星通信的站点， 其中， 所述地面控制站包括： 主控站、 注入站、 监测站。 4. The method according to claim 2, wherein the ground control station is a station located on the ground and communicating with a navigation satellite, wherein the ground control station comprises: a master station, an injection station, and a monitoring station. 5. 根据权利要求 1所述的方法， 其中， 所述导航电文还包括以下至少之一信息： 每个所述电离层延迟修正参数集对应的适用地区范围信息、 每个所述电离层延 迟修正参数集适用的电离层模型， 其中， 不同的电离层模型对应不同的电离层 延迟计算方法。 The method according to claim 1, wherein the navigation message further comprises at least one of the following: applicable region range information corresponding to each of the ionospheric delay correction parameter sets, and each of the ionospheric delay corrections The ionospheric model to which the parameter set is applicable, wherein different ionospheric models correspond to different ionospheric delay calculation methods. 6. 根据权利要求 1所述的方法， 其中， 所述导航卫星通过以下步骤确定每个所述 电离层延迟修正参数集对应的适用地区范围信息和适用的电离层模型： 6. The method according to claim 1, wherein the navigation satellite determines the applicable region range information and the applicable ionospheric model corresponding to each of the ionospheric delay correction parameter sets by the following steps: 所述导航卫星根据每个所述电离层延迟修正参数集在所述导航电文中的顺 序或位置， 协议约定每个所述电离层延迟修正参数集对应的适用地区范围信息 和适用的电离层模型。 The navigation satellites according to the order or position of each of the ionospheric delay correction parameter sets in the navigation message, agreeing to apply the applicable region range information and the applicable ionosphere model corresponding to each of the ionospheric delay correction parameter sets. . 7. 根据权利要求 1至 6中任一项所述的方法， 其中， 不同的电离层延迟修正参数 集对应相同或不同的适用地区范围。 The method according to any one of claims 1 to 6, wherein different sets of ionospheric delay correction parameters correspond to the same or different applicable region ranges. 8. 根据权利要求 1至 6中任一项所述的方法， 其中， 不同的电离层延迟修正参数 集具备以下至少之一特征： The method according to any one of claims 1 to 6, wherein the different ionospheric delay correction parameter sets have at least one of the following characteristics: 不同的电离层延迟修正参数集对应相同或不同的电离层模型； 不同的电离层延迟修正参数集包含参数的个数相同或不同； 不同的电离层延迟修正参数集的参数取值相同或不同。  Different ionospheric delay correction parameter sets correspond to the same or different ionospheric models; different ionospheric delay correction parameter sets contain the same or different parameters; different ionospheric delay correction parameter sets have the same or different parameters. 9. 根据权利要求 1所述的方法， 其中， 所述导航卫星通过导航电文广播多个所述 电离层延迟修正参数集包括： 9. The method according to claim 1, wherein the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets by using a navigation message, including: 所述导航卫星通过导航电文将多个所述电离层延迟修正参数集广播给终端 和 /或与所述导航卫星在同一导航系统中的其他导航卫星。  The navigation satellite broadcasts a plurality of the set of ionospheric delay correction parameters to the terminal and/or other navigation satellites in the same navigation system as the navigation satellite via a navigation message. 10. 根据权利要求 9所述的方法， 其中， 在所述导航卫星通过导航电文将多个所述 电离层延迟修正参数集广播给与所述导航卫星在同一导航系统中的其他导航卫 星的情况下， 所述导航卫星为静止轨道卫星， 与所述导航卫星在同一导航系统 中的其他导航卫星为非静止轨道卫星。 10. The method according to claim 9, wherein: the navigation satellite broadcasts a plurality of the ionospheric delay correction parameter sets to other navigation satellites in the same navigation system as the navigation satellite by using a navigation message Next, the navigation satellite is a geostationary orbit satellite, and other navigation satellites in the same navigation system as the navigation satellite are non-geostationary orbit satellites. 11. 根据权利要求 1所述的方法， 其中， 所述导航卫星通过以下方式广播多个所述 电离层延迟修正参数集： 11. The method of claim 1, wherein the navigation satellite broadcasts a plurality of the ionospheric delay correction parameter sets by: 所述导航卫星对多个所述电离层延迟修正参数集中的部分或全部电离层延 迟修正参数集加密后再广播。  The navigation satellite encrypts and then broadcasts part or all of the ionospheric delay correction parameter sets in the plurality of ionospheric delay correction parameter sets. 12. 根据权利要求 1所述的方法， 其中， 所述导航卫星通过导航电文广播多个所述 电离层延迟修正参数集包括： 12. The method according to claim 1, wherein the navigation satellite broadcasts the plurality of the ionospheric delay correction parameter sets by using a navigation message: 所述导航卫星在相同或不同的广播信道中广播不同的电离层延迟修正参数 集， 其中， 不同的广播信道对应不同的频点。  The navigation satellite broadcasts different sets of ionospheric delay correction parameters in the same or different broadcast channels, wherein different broadcast channels correspond to different frequency points. 13. 一种电离层延迟修正参数的传递装置， 包括： 13. A transfer device for ionospheric delay correction parameters, comprising: 获取模块， 设置为获取多个电离层延迟修正参数集， 其中， 每个所述电离 层延迟修正参数集对应有适用地区范围；  An acquiring module, configured to obtain a plurality of ionospheric delay correction parameter sets, where each of the ionospheric delay correction parameter sets corresponds to a applicable region range; 广播模块， 设置为通过导航电文广播多个所述电离层延迟修正参数集。  A broadcast module is configured to broadcast a plurality of the ionospheric delay correction parameter sets by a navigation message. 14. 一种导航卫星， 包括权利要求 13所述的电离层延迟修正参数的传递装置。 A navigation satellite comprising the ionospheric delay correction parameter transfer device of claim 13.
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