CN116299569A - A method and system for dynamic measurement of elevation control network based on GNSS - Google Patents

Abstract

The invention discloses a dynamic measurement method and a system for an elevation control network based on GNSS, wherein the method comprises the following steps: when the elevation control network is restored, obtaining the constant difference of the heights Cheng Yi of all nodes of the elevation control network relative to the starting point of the stable elevation; performing staged synchronous GNSS observation on the stable elevation starting point and each node to obtain the real-time geodetic height of the Cheng Qisuan stable height point and the real-time geodetic height of each node; and calculating the real-time normal height of each node according to the normal height and the real-time ground height of the stable elevation starting point and the Gao Chengyi common difference and the real-time ground height of each node. The high-precision dynamic measurement of the elevation control network is realized by using the GNSS technology, the defects of station-by-station transmission, more personnel, high cost, low efficiency, long time consumption and the like existing in the maintenance of the elevation control network by using the leveling measurement are overcome, the operation efficiency is improved, the number of personnel is reduced, and the maintenance precision of the elevation control network can reach the precision level equivalent to the level network retesting.

Description

A method and system for dynamic measurement of elevation control network based on GNSS

technical field

The invention relates to the technical field of measurement, in particular to a method and system for dynamic measurement of an elevation control network based on GNSS.

Background technique

At present, leveling is the only technical means to establish an elevation control network. Although satellite navigation and positioning technology (GNSS) is widely used and tends to replace conventional geodetic methods, it still cannot replace precise leveling in terms of precise elevation transmission at this stage. Over the years, my country has done a lot of work in the establishment, maintenance and application services of the elevation control network. For example: national surveying and mapping authorities at all levels have organized and implemented several large-scale elevation control network re-measurement projects; military and local departments and engineering units have carried out a large number of elevation control network surveys in various regions all year round. National earthquake authorities at all levels are monitoring the seismically active fault zones year by year, month by month or even day by day by means of leveling.

For a long time, leveling has been one of the most important methods for establishing and maintaining geodetic datums, and it is also the most expensive project in terms of manpower and material resources. Due to the impact of various factors such as crustal movement, urban construction, groundwater exploitation and mineral resource development, land subsidence has occurred in various degrees in many areas of my country. The graded elevation control network must be retested regularly to ensure that the results of the elevation control network can reflect the real situation of the ground elevation.

For general areas, the retest period is 2-5 years, and for areas with severe subsidence, the retest period is generally 0.5-2 years or even shorter. At the present stage, the elevation control network composed of leveling networks of various levels must adopt the method of station-by-station leveling to transmit the elevation value from the elevation starting point to each node of the elevation control network. The length of the leveling route is related to the size of the area. Generally speaking, the length of the city-level regional leveling route is 2000-4000 kilometers, the length of the provincial-level region’s leveling route is 5000-20000 kilometers, and the length of the nationwide leveling route is 200000- 400,000 kilometers. Taking a city-level area with a leveling route length of about 2,000 kilometers as an example, 10 leveling survey teams with a total of 60 people will need at least 3 months to complete all leveling network observations. Observations require more work and take longer. There are many retesting operators of the elevation control network, high economic cost, low operation efficiency, and long operation time. Especially for areas with serious land subsidence, the remeasurement period of the elevation control network is generally 1 year or even shorter, and the leveling network retesting has been carried out for many years. , the cost is quite high.

The current height control network mainly relies on leveling technology to transmit height. Leveling, also known as geometric leveling, is a method of measuring the height difference between two points on the ground with a level and a leveling rod. Place a level between two points on the ground, observe the leveling rod erected on the two points, and calculate the height difference between the two points according to the reading on the ruler. Usually starting from the leveling origin or any known elevation point, leveling instruments are erected station by station along the selected leveling route for leveling observation, and the elevation of each leveling stone point is measured. As shown in Figure 1, the leveling network is composed of multiple leveling routes. It is measured from a certain point with known elevation, that is, the starting point of stable elevation. Every level. Each leveling route forms a closed or echoing route, carries out leveling network data processing, and calculates the leveling point elevation after adjustment. In Figure 1, the rhombus point is the starting point for stable elevation, and the origin is the node of the elevation control network, that is, the benchmarking point. The re-measurement of the height control network is to measure the latest normal height of each level point. Using the leveling measurement mode, it is necessary to measure from the starting point of the height, and set up leveling instruments station by station to transmit the height of the starting point of the height to each node. The triangle in the figure is the level Each station on the route.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a GNSS-based dynamic measurement method and system for the elevation control network. By using GNSS technology to realize the high-precision dynamic maintenance of the elevation control network, it solves the problem of using leveling to maintain the elevation control network in the prior art. Inherent defects such as station-by-station transmission, many operators, high economic cost, low operation efficiency, and long operation time, reduce the maintenance cost and operation time of the elevation control network, improve operation efficiency, and reduce the number of operators. Make the maintenance accuracy of the elevation control network reach the same level of accuracy as the re-measurement of the leveling network.

In order to solve the above technical problems, the first aspect of the embodiments of the present invention provides a GNSS-based elevation control network dynamic measurement method, including the following steps:

When the elevation control network is re-measured, obtain the elevation anomaly difference of each node of the elevation control network relative to the starting point of the stable elevation;

Carrying out stage-by-stage synchronous GNSS observations to the stable elevation starting point and each node, to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node;

The real-time normal height of each node is calculated according to the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time geodetic height of each node.

Further, the acquisition of the elevation abnormality difference of each node of the elevation control network relative to the stable elevation starting point includes:

Carry out leveling network observation to described stable elevation starting point and described each node, obtain the normal height after the adjustment of described each node;

Carrying out network-wide GNSS observations on the starting point of the stable elevation and each node to obtain the geodetic height of the starting point of the stable elevation and the geodetic height of each node;

According to the geodetic height of the stable elevation starting point and the adjusted normal height and geodetic height of each node, the elevation anomaly difference of each node relative to the stable elevation starting point is obtained.

Further, the leveling network observation of the stable elevation starting point and each node is carried out to obtain the normal height after adjustment of each node, including:

Starting from the starting point of the stable elevation, adopting the leveling mode to transmit the elevation station by station, and obtaining the elevation difference observation value of each water measurement section;

Perform leveling network adjustment calculations to obtain the adjusted normal heights of each node.

Further, the whole network GNSS observation of the stable elevation starting point and each node is carried out to obtain the geodetic height of the stable elevation starting point and the geodetic height of each node, including:

Carrying out phased synchronous GNSS observations to the stable elevation starting point and the various nodes;

The geodetic height of the stable elevation starting point and the geodetic height of each node are calculated from the GNSS reference station and the GNSS measurement data of each node.

Correspondingly, the second aspect of the embodiments of the present invention provides a GNSS-based elevation control network dynamic measurement system, including:

An acquisition module, which is used to obtain the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point when the elevation control network is remeasured;

A measurement module, which is used to perform phased synchronous GNSS observations on the stable elevation starting point and the various nodes, to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of the various nodes;

A calculation module, which is used to calculate the real-time normal height of each node according to the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time geodetic height of each node.

Further, the acquisition module includes:

The first measurement sub-module is used to perform leveling network observation on the stable elevation starting point and each node, and obtain the adjusted normal height of each node;

The second measurement sub-module is used to perform network-wide GNSS observations on the stable elevation starting point and each node, and obtain the geodetic height of the stable elevation starting point and the geodetic height of each node;

The calculation sub-module is used to obtain the elevation anomaly difference of each node relative to the stable elevation starting point according to the geodetic height of the stable elevation starting point and the adjusted normal height and geodetic height of each node.

Further, the first measurement submodule includes:

The first measurement unit is used to measure from the starting point of the stable elevation, adopt the leveling mode to transfer the elevation station by station, and obtain the height difference observation value of each water measurement section;

The first calculation unit is used for leveling network adjustment calculation, and obtains the adjusted normal height of each node.

Further, the second measurement submodule includes:

A second measurement unit, which is used to perform phased synchronous GNSS observations on the stable elevation starting point and the various nodes;

The second calculation unit is used to calculate the geodetic height of the stable elevation starting point and the geodetic height of each node from the GNSS reference station and the GNSS measurement data of each node.

Correspondingly, the third aspect of the embodiments of the present invention also provides an electronic device, including: at least one processor; and a memory connected to the at least one processor; wherein, the memory stores information that can be used by the one Instructions executed by a processor, the instructions are executed by the one processor, so that the at least one processor executes the above-mentioned method for dynamic measurement of an elevation control network based on GNSS.

In addition, the fourth aspect of the embodiments of the present invention also provides a computer-readable storage medium, on which computer instructions are stored, and when the instructions are executed by a processor, the above-mentioned dynamic measurement method for an elevation control network based on GNSS is implemented.

The above technical solutions of the embodiments of the present invention have the following beneficial technical effects:

By using GNSS technology to achieve high-precision dynamic maintenance of the elevation control network, it solves the inherent problems of station-by-station transmission, large number of operators, high economic cost, low operation efficiency, and long operation time in the existing technology of using leveling to maintain the elevation control network. The defect reduces the maintenance cost and operation time of the elevation control network, improves the operation efficiency, reduces the number of operators, and enables the maintenance accuracy of the elevation control network to reach the same level of accuracy as the re-measurement of the leveling network.

Description of drawings

Fig. 1 is a schematic diagram of the principle of leveling in the prior art;

Fig. 2 is the flow chart of the dynamic measurement method of the GNSS-based elevation control network provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of the principles of the GNSS-based elevation control network dynamic measurement method provided by the embodiment of the present invention;

Fig. 4 is a GNSS-based elevation control network dynamic measurement method provided by an embodiment of the present invention;

Fig. 5 is the module block diagram of the dynamic measurement system of the elevation control network based on GNSS that the embodiment of the present invention provides;

Fig. 6 is a schematic diagram of an acquisition module provided by an embodiment of the present invention;

Fig. 7 is a schematic diagram of a first measurement sub-module provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of a second measurement sub-module provided by an embodiment of the present invention.

Reference signs:

1. Acquisition module, 11. First measurement sub-module, 111. First measurement unit, 112. First calculation unit, 12. Second measurement sub-module, 121. Second measurement unit, 122. Second calculation unit, 13 1. Calculation sub-module, 2. Measurement module, 3. Calculation module.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

Fig. 2 is a flowchart of a GNSS-based dynamic measurement method for an elevation control network provided by an embodiment of the present invention.

Fig. 3 is a schematic diagram of the principles of the GNSS-based dynamic measurement method for the elevation control network provided by the embodiment of the present invention.

Please refer to Fig. 2 and Fig. 3, the first aspect of the embodiment of the present invention provides a kind of height control network dynamic measurement method based on GNSS, comprises the following steps:

S100, during the retesting of the elevation control network, obtain an abnormal difference in elevation of each node of the elevation control network relative to a stable elevation starting point.

S200, performing phased synchronous GNSS observations on the starting point of the stable elevation and each node to obtain the real-time geodetic height of the starting point of the stable elevation and the real-time geodetic height of each node.

S300, calculate and obtain the real-time normal height of each node according to the normal height of the stable elevation starting point and the real-time geodetic height and the elevation anomaly difference of each node and the real-time geodetic height.

Concretely, in step S100, obtain the height anomaly difference of each node of the height control network relative to the stable height starting point, including:

S110 performs leveling network observation on the stable elevation starting point and each node, and obtains the adjusted normal height of each node.

S120 conducts network-wide GNSS observations on the starting point of the stable elevation and each node, and obtains the geodetic height of the starting point of the stable elevation and the geodetic height of each node.

S130 is based on the geodetic height of the starting point of the stable elevation and the adjusted normal height and geodetic height of each node to obtain the elevation anomaly difference of each node relative to the starting point of the stable elevation.

Further, in step S110, the leveling network observation is carried out to the starting point of the stable elevation and each node to obtain the normal height after adjustment of each node, including:

S111, measure from the starting point of the stable elevation, use the leveling mode to transmit the elevation station by station, and obtain the observation value of the elevation difference of each water leveling section.

S112 , perform leveling network adjustment calculation, and obtain the adjusted normal heights of each node.

Further, in step S120, the whole network GNSS observation is carried out to the starting point of the stable elevation and each node to obtain the geodetic height of the starting point of the stable elevation and the geodetic height of each node, including:

S121 conducts phased synchronous GNSS observations on the starting point of the stable elevation and each node.

S122 Calculate the geodetic height of the starting point of the stable elevation and the geodetic height of each node from the GNSS reference station and the GNSS measurement data of each node.

Fig. 4 is a schematic diagram of a GNSS-based dynamic measurement method for an elevation control network provided by an embodiment of the present invention.

Please refer to Figure 4, the rhombus point is the starting point of the stable elevation, and the round point is the node of the elevation control network. The retest of the elevation control network is to measure the real-time normal height of each node. Using the GNSS measurement mode, only need to set up GNSS instruments at the nodes to determine the real-time normal height of each node.

In the above technical solutions, the basic principle of using GNSS technology for dynamic maintenance of the altitude control network is as follows:

Assuming that the node in the elevation control network is P, and the starting point of the stable elevation is Q, then:

h _P ＝ H _P +ζ _P (1)

h _Q ＝H _Q +ζ _Q (2)

Δh _QP = h _P -h _Q (3)

In the formula: h is the geodetic height, H is the normal height, ζ is the elevation anomaly, Δh is the geodetic height difference, and the normal height H _P of node P at time t can be obtained by combining formulas (1)-(3):

H _P (t) = H _Q + [h _P (t) - h _Q (t)] - [ζ _P (t) - ζ _Q (t)] (4)

In the formula: H _Q is the normal height of the starting point Q of the stable elevation, which is a known fixed quantity and does not change with time; h _P (t) and h _Q (t) are the geodetic heights of the two points at time t, respectively, Obtained by GNSS measurement at two points at the same time; ζ _P (t) and ζ _Q (t) are the elevation anomalies of the two points respectively, because the difference of elevation anomalies changes with time is generally at the millimeter level, which can be ignored, using the first Calculate the height anomaly difference between the normal height and geodetic height observed by the periodic leveling network:

ζ _P (t) = ζ _P (t ₀ ) = h _P (t ₀ )-H _P (t ₀ ) (5)

ζ _Q (t) = ζ _Q (t ₀ ) = h _Q (t ₀ )-H _Q (t ₀ ) (6)

but:

ζ _P (t) - ζ _Q (t) = [h _P (t ₀ ) - H _P (t ₀ )] - [h _Q (t ₀ ) - H _Q ] (7)

In the formula: t ₀ is the observation time of the first leveling network; h _P (t ₀ ) and h _Q (t ₀ ) are the geodetic heights of the node P and the starting point Q of the stable elevation at the time t ₀ respectively, measured by GNSS Obtained; H _P (t ₀ ) is the normal height of node P at time t ₀ , obtained from the observation of the first leveling network, H _Q is the normal height of starting point Q of the stable elevation.

Combining formulas (4) and (7) can determine the normal height _HP of fixed node P at time t.

In conjunction with the above calculation process, the steps of an embodiment of the GNSS-based height control network dynamic measurement method are:

N为结点数量。1) During the first elevation control network observation, measure from the starting point of the stable elevation, use the leveling mode to transfer the elevation station by station, obtain the observed height difference values of each leveling section, and perform the leveling network adjustment calculation to obtain the elevation Normal height after adjustment of each node in the control network

N is the number of nodes.

2) During the first elevation control network observation, set up GNSS instruments at each node of the elevation control network, and perform phased synchronous GNSS observations with the starting point of the stable elevation. The number of synchronous observation points is determined according to the number of GNSS instruments, combined with high-precision GNSS The GNSS measurement data of the reference station and nodes are processed to obtain the three-dimensional coordinates (latitude, longitude, and geodetic height) of the stable elevation starting point and each node of the elevation control network. The geodetic heights are h _Q (t ₀ ) and

3) According to formula (7), using the geodetic height and normal height of the starting point of the stable elevation and the geodetic height and normal height of each node, the height anomaly difference ζ between each node and the starting point of the stable elevation is calculated _P (t ₀ )-ζ _Q (t ₀ ).

4) In the second and subsequent re-measurement of the elevation control network, no leveling survey is required, only the phase-by-stage synchronous GNSS observations are required at the starting point of the stable elevation and each node of the elevation control network, the method is the same as step 2 ), get the new three-dimensional coordinates (latitude, longitude, geodetic height) of the starting point of the stable elevation and each node of the elevation control network, and the geodetic height is h _Q (t) and

5) According to formula (4), using the normal height of the starting point of the stable elevation, the real-time geodetic height, the real-time geodetic height of each node, and the height anomaly of each node relative to the starting point of the stable elevation obtained in step 3) difference, the real-time normal height of each node in the elevation control network is calculated

For an elevation control network, the number of nodes ranges from hundreds to tens of thousands. Using leveling to dynamically maintain the elevation control network requires a lot of work, high cost and time-consuming. If the above-mentioned GNSS measurement method is used to dynamically maintain the normal height of each node, it is only necessary to conduct the first leveling network observation at the very beginning to obtain the normal height of each node, and at the same time perform GNSS measurement for each node to obtain the geodetic High, every subsequent measurement does not need to carry out leveling observation, only needs to re-measure GNSS at each node, and then the real-time normal height of each node of the elevation control network can be obtained, so as to realize the dynamic maintenance of the elevation control network .

For the re-measurement of the elevation control network with the same number of points, the observers, operating costs, and time-consuming required by the GNSS measurement mode are much lower than those of the leveling measurement mode. The maintenance cost and operation time of the network can be improved, the operation efficiency can be improved, and the number of operators can be reduced, and the accuracy of the re-measurement of the elevation control network can reach the same level of accuracy as the re-measurement of the leveling network.

The above-mentioned GNSS-based dynamic measurement method of the elevation control network adopts the GNSS measurement method to dynamically maintain the normal height of each node of the elevation control network. The real-time geodetic height of each node measured by GNSS is combined with the elevation anomaly difference of each node relative to the elevation starting point to obtain the real-time height of each node in the elevation control network. normal height, so as to realize the dynamic maintenance of the elevation control network.

Utilizing GNSS technology for dynamic maintenance of the elevation control network, in addition to the need to carry out leveling network observation for the first time, the second and subsequent elevation control network re-measurements do not need to carry out leveling surveys, only need to be at the starting point of the stable elevation and the elevation control network Each node of each node performs phase-by-stage synchronous GNSS observations. For the re-measurement of the elevation control network with the same number of points, the observers, operating costs, and time-consuming required by the GNSS measurement mode are much lower than those of the leveling measurement mode. The maintenance cost and operation time of the network can be improved, the operation efficiency can be improved, and the number of operators can be reduced, and the accuracy of the re-measurement of the elevation control network can reach the same level of accuracy as the re-measurement of the leveling network.

Fig. 5 is a module block diagram of a GNSS-based elevation control network dynamic measurement system provided by an embodiment of the present invention.

Correspondingly, referring to FIG. 5 , the second aspect of the embodiment of the present invention provides a GNSS-based elevation control network dynamic measurement system, including: an acquisition module 1 , a measurement module 2 and a calculation module 3 . Among them, the acquisition module 1 is used to obtain the height abnormal difference of each node of the height control network relative to the starting point of the stable height when the height control network is re-measured; the measurement module 2 is used to analyze the starting point of the stable height and each node. Stage synchronous GNSS observations to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node; the calculation module 3 is used to obtain the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time height of each node The height of the earth is calculated to obtain the real-time normal height of each node.

Fig. 6 is a schematic diagram of an acquisition module provided by an embodiment of the present invention.

Further, referring to FIG. 6 , the acquisition module 1 includes: a first measurement submodule 11 , a second measurement submodule 12 and a calculation submodule 13 . Among them, the first measurement sub-module 11 is used to observe the leveling network of the stable elevation starting point and each node, and obtain the normal height after adjustment of each node; the second measurement sub-module 12 is used for the stable elevation starting point and each node. The nodes carry out GNSS observations of the whole network to obtain the geodetic height of the starting point of stable elevation and the geodetic height of each node; the calculation sub-module 13 is used to calculate the normal height and geodetic height of each node according to the geodetic height of the starting point of stable elevation and the adjustment of each node High, get the elevation anomaly difference of each node relative to the starting point of stable elevation.

Fig. 7 is a schematic diagram of the first measurement sub-module provided by the embodiment of the present invention.

Further, referring to FIG. 7 , the first measurement sub-module 11 includes: a first measurement unit 111 and a first calculation unit 112 . Among them, the first measurement unit 111 is used to measure from the starting point of the stable elevation, and adopts the leveling mode to transmit the elevation station by station, so as to obtain the height difference observation value of each water leveling section; the first calculation unit 112 is used for leveling network adjustment Calculate and obtain the normal height after adjustment of each node.

Fig. 8 is a schematic diagram of a second measurement sub-module provided by an embodiment of the present invention.

Further, referring to FIG. 8 , the second measurement sub-module 12 includes: a second measurement unit 121 and a second calculation unit 122 . Among them, the second measurement unit 121 is used to carry out phased synchronous GNSS observations on the stable elevation starting point and each node; the second calculation unit 122 is used to calculate the stable elevation starting point by calculating the GNSS measurement data of the GNSS reference station and each node The earth height of and the earth height of each node.

The above-mentioned GNSS-based elevation control network dynamic measurement system realizes the high-precision dynamic maintenance of the elevation control network by using GNSS technology, and solves the problem of station-by-station transfer, large number of operators, and high economic cost in the existing technology of using leveling to maintain the elevation control network. Inherent defects such as low operation efficiency and long operation time reduce the maintenance cost and operation time of the elevation control network, improve operation efficiency, reduce the number of operators, and make the maintenance accuracy of the elevation control network reach the same level as that of the leveling network. equivalent level of accuracy.

Correspondingly, the third aspect of the embodiments of the present invention also provides an electronic device, including: at least one processor; and a memory connected to the at least one processor; wherein, the memory stores information that can be used by the one Instructions executed by a processor, the instructions are executed by the one processor, so that the at least one processor executes the above-mentioned method for dynamic measurement of an elevation control network based on GNSS.

In addition, the fourth aspect of the embodiments of the present invention also provides a computer-readable storage medium, on which computer instructions are stored, and when the instructions are executed by a processor, the above-mentioned dynamic measurement method for an elevation control network based on GNSS is implemented.

The embodiment of the present invention aims to protect a GNSS-based elevation control network dynamic measurement method and system, wherein the method includes: during the re-measurement of the elevation control network, obtaining the elevation anomalies of each node of the elevation control network relative to the stable elevation starting point difference; carry out phase-by-stage synchronous GNSS observations on the starting point of the stable elevation and each node, and obtain the real-time geodetic height of the starting point of the stable elevation and the real-time geodetic height of each node; The elevation anomaly difference of nodes and the real-time earth height are calculated to obtain the real-time normal height of each node. The above-mentioned technical scheme has the following effects:

By using GNSS technology to achieve high-precision dynamic maintenance of the elevation control network, it solves the inherent problems of station-by-station transmission, large number of operators, high economic cost, low operation efficiency, and long operation time in the existing technology of using leveling to maintain the elevation control network. The defect reduces the maintenance cost and operation time of the elevation control network, improves the operation efficiency, reduces the number of operators, and enables the maintenance accuracy of the elevation control network to reach the same level of accuracy as the re-measurement of the leveling network.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (10)

1. a GNSS-based height control network dynamic measurement method, is characterized in that, comprises the steps: When the elevation control network is re-measured, obtain the elevation anomaly difference of each node of the elevation control network relative to the starting point of the stable elevation; Carrying out stage-by-stage synchronous GNSS observations to the stable elevation starting point and each node, to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of each node; The real-time normal height of each node is calculated according to the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time geodetic height of each node. 2. the height control network dynamic measurement method based on GNSS according to claim 1, is characterized in that, each node of described acquisition height control network is with respect to the height anomaly difference of stable height starting calculation point, comprises: Carry out leveling network observation to described stable elevation starting point and described each node, obtain the normal height after the adjustment of described each node; Carrying out network-wide GNSS observations on the starting point of the stable elevation and each node to obtain the geodetic height of the starting point of the stable elevation and the geodetic height of each node; According to the geodetic height of the stable elevation starting point and the adjusted normal height and geodetic height of each node, the elevation anomaly difference of each node relative to the stable elevation starting point is obtained. 3. the height control network dynamic measurement method based on GNSS according to claim 2, is characterized in that, described stable elevation starting point and described each node are carried out leveling network observation and obtain the average value of each node. Normal high after difference, including: Starting from the starting point of the stable elevation, adopting the leveling mode to transmit the elevation station by station, and obtaining the elevation difference observation value of each water measurement section; Perform leveling network adjustment calculations to obtain the adjusted normal heights of each node. 4. the height control network dynamic measurement method based on GNSS according to claim 2, is characterized in that, described stable height starting point and described each node are carried out whole network GNSS observation and obtain described stable height starting point The geodetic height and the geodetic height of each node include: Carrying out phased synchronous GNSS observations to the stable elevation starting point and the various nodes; The geodetic height of the stable elevation starting point and the geodetic height of each node are calculated from the GNSS reference station and the GNSS measurement data of each node. 5. A GNSS-based height control network dynamic measurement system, is characterized in that, comprising: An acquisition module, which is used to obtain the elevation anomaly difference of each node of the elevation control network relative to the stable elevation starting point when the elevation control network is remeasured; A measurement module, which is used to perform phased synchronous GNSS observations on the stable elevation starting point and the various nodes, to obtain the real-time geodetic height of the stable elevation starting point and the real-time geodetic height of the various nodes; A calculation module, which is used to calculate the real-time normal height of each node according to the normal height and real-time geodetic height of the stable elevation starting point and the elevation anomaly difference and real-time geodetic height of each node. 6. the height control network dynamic measurement system based on GNSS according to claim 5, is characterized in that, described acquisition module comprises: The first measurement sub-module is used to perform leveling network observation on the stable elevation starting point and each node, and obtain the adjusted normal height of each node; The second measurement sub-module is used to perform network-wide GNSS observations on the stable elevation starting point and each node, and obtain the geodetic height of the stable elevation starting point and the geodetic height of each node; The calculation sub-module is used to obtain the elevation anomaly difference of each node relative to the stable elevation starting point according to the geodetic height of the stable elevation starting point and the adjusted normal height and geodetic height of each node. 7. the height control network dynamic measurement system based on GNSS according to claim 6, is characterized in that, described first measurement submodule comprises: The first measurement unit is used to measure from the starting point of the stable elevation, adopt the leveling mode to transfer the elevation station by station, and obtain the height difference observation value of each water measurement section; The first calculation unit is used for leveling network adjustment calculation, and obtains the adjusted normal height of each node. 8. the height control network dynamic measurement system based on GNSS according to claim 6, is characterized in that, described second measurement submodule comprises: A second measurement unit, which is used to perform phased synchronous GNSS observations on the stable elevation starting point and the various nodes; The second calculation unit is used to calculate the geodetic height of the stable elevation starting point and the geodetic height of each node from the GNSS reference station and the GNSS measurement data of each node. 9. An electronic device, characterized in that it comprises: at least one processor; and a memory connected to the at least one processor; wherein, the memory stores instructions executable by the one processor, the The instructions are executed by the one processor, so that the at least one processor executes the method for dynamic measurement of the GNSS-based elevation control network according to any one of claims 1-4. 10. A computer-readable storage medium, characterized in that computer instructions are stored thereon, and when the instructions are executed by a processor, the method for dynamic measurement of an elevation control network based on GNSS according to any one of claims 1-4 is implemented.

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