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FR2353043A1 - Improved horizon sensor for artificial satellites - uses thermosensitive elements and subtractive compensation elements relative to thermal image of earth - Google Patents

Improved horizon sensor for artificial satellites - uses thermosensitive elements and subtractive compensation elements relative to thermal image of earth

Info

Publication number
FR2353043A1
FR2353043A1 FR7615638A FR7615638A FR2353043A1 FR 2353043 A1 FR2353043 A1 FR 2353043A1 FR 7615638 A FR7615638 A FR 7615638A FR 7615638 A FR7615638 A FR 7615638A FR 2353043 A1 FR2353043 A1 FR 2353043A1
Authority
FR
France
Prior art keywords
elements
earth
thermal image
artificial satellites
horizon sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7615638A
Other languages
French (fr)
Other versions
FR2353043B1 (en
Inventor
Francois Desvignes
Marcel Hebert
Jean-Pierre Krebs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SODERN SA
Original Assignee
SODERN SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SODERN SA filed Critical SODERN SA
Priority to FR7615638A priority Critical patent/FR2353043A1/en
Publication of FR2353043A1 publication Critical patent/FR2353043A1/en
Application granted granted Critical
Publication of FR2353043B1 publication Critical patent/FR2353043B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/78—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves
    • G01S3/782—Systems for determining direction or deviation from predetermined direction
    • G01S3/785—Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system
    • G01S3/786—Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system the desired condition being maintained automatically
    • G01S3/7868—Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system the desired condition being maintained automatically using horizon sensors

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Navigation (AREA)

Abstract

The horizon sensor is for artificial satellites. It uses thermosensitive elements (m1, m2) of equal area (Am) to evaluate the angle of the axis w.r.t. the centre of the earth, whose thermal image is formed on the elements concerned. These elements are aligned and positioned symmetrically relative to the origin of the x,y,z system of axes so that the parts of their sensitive surfaces irradiated at zero pointing error have equal areas. A "subtractive" compensative element (c1, c2) is associated with each main sensor (m1, m2). These compensative elements have areas Ac and are totally covered by the image of the earth.
FR7615638A 1976-05-24 1976-05-24 Improved horizon sensor for artificial satellites - uses thermosensitive elements and subtractive compensation elements relative to thermal image of earth Granted FR2353043A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7615638A FR2353043A1 (en) 1976-05-24 1976-05-24 Improved horizon sensor for artificial satellites - uses thermosensitive elements and subtractive compensation elements relative to thermal image of earth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7615638A FR2353043A1 (en) 1976-05-24 1976-05-24 Improved horizon sensor for artificial satellites - uses thermosensitive elements and subtractive compensation elements relative to thermal image of earth

Publications (2)

Publication Number Publication Date
FR2353043A1 true FR2353043A1 (en) 1977-12-23
FR2353043B1 FR2353043B1 (en) 1981-07-31

Family

ID=9173544

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7615638A Granted FR2353043A1 (en) 1976-05-24 1976-05-24 Improved horizon sensor for artificial satellites - uses thermosensitive elements and subtractive compensation elements relative to thermal image of earth

Country Status (1)

Country Link
FR (1) FR2353043A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533883A1 (en) * 1982-10-04 1984-04-06 Sodern Terrestrial horizon sensor using charge transfer photodetectors
WO1998012108A3 (en) * 1996-09-17 1998-08-20 Satellite attitude sensor using thermal imaging
US6066850A (en) * 1996-09-17 2000-05-23 Canadian Space Agency Satellite attitude sensor using thermal imaging

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533883A1 (en) * 1982-10-04 1984-04-06 Sodern Terrestrial horizon sensor using charge transfer photodetectors
WO1998012108A3 (en) * 1996-09-17 1998-08-20 Satellite attitude sensor using thermal imaging
US6066850A (en) * 1996-09-17 2000-05-23 Canadian Space Agency Satellite attitude sensor using thermal imaging

Also Published As

Publication number Publication date
FR2353043B1 (en) 1981-07-31

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