GB1217031A - Horizon sensor with earth tangency mask - Google Patents

Horizon sensor with earth tangency mask

Info

Publication number
GB1217031A
GB1217031A GB1375168A GB1375168A GB1217031A GB 1217031 A GB1217031 A GB 1217031A GB 1375168 A GB1375168 A GB 1375168A GB 1375168 A GB1375168 A GB 1375168A GB 1217031 A GB1217031 A GB 1217031A
Authority
GB
United Kingdom
Prior art keywords
disc
earth
detector
horizon sensor
sun
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.)
Expired
Application number
GB1375168A
Inventor
Gerald Falbel
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.)
Barnes Engineering Co
Original Assignee
Barnes Engineering Co
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 Barnes Engineering Co filed Critical Barnes Engineering Co
Priority to GB1375168A priority Critical patent/GB1217031A/en
Publication of GB1217031A publication Critical patent/GB1217031A/en
Expired 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
    • G01S3/783—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from static detectors or detector systems

Landscapes

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

Abstract

1,217,031. Horizon sensor. BARNES ENG. CO. 21 March, 1968, No. 13751/68. Heading H4D. The specification describes a horizon sensor particularly for use in a high altitude circular orbit satellite and comprising a large aperture silicon lens 2, Fig. 1, imaging the Earth's disc 7, Fig. 2, at the mouth of four pyramidal holes 5 at the bottom of each of which thermopile detectors 6 detect and give proportional outputs to the part's of the Earth's disc falling thereon, opposing detectors being connected in opposition. A disc 7 at the mouths of the holes blocks off the central part of the Earth's disc wherein error producing thermal variations could be produced. A filter 3 ensures that I.R.. radiation around the wavelength 15Á only passes to the detector, thus overcoming interference from cold clouds &c. If the.sun should be imaged on one detector e.g. the bottom one as shown in Fig. 1, a central, small inverting lens system, passing all I.R. wavelengths images the sun with equal intensity on the opposite (upper) detector. The above sensor, apart from disc 7 is described in U.S:A. Specification 3,422,267. ,
GB1375168A 1968-03-21 1968-03-21 Horizon sensor with earth tangency mask Expired GB1217031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1375168A GB1217031A (en) 1968-03-21 1968-03-21 Horizon sensor with earth tangency mask

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1375168A GB1217031A (en) 1968-03-21 1968-03-21 Horizon sensor with earth tangency mask

Publications (1)

Publication Number Publication Date
GB1217031A true GB1217031A (en) 1970-12-23

Family

ID=10028706

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1375168A Expired GB1217031A (en) 1968-03-21 1968-03-21 Horizon sensor with earth tangency mask

Country Status (1)

Country Link
GB (1) GB1217031A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547917A1 (en) * 1983-06-24 1984-12-28 Messerschmitt Boelkow Blohm METHOD FOR PROCESSING THE OUTPUT SIGNAL OF AN OPTICAL SENSOR OF TERRESTRIAL HORIZONS OF A GEOSTATIONARY SATELLITE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547917A1 (en) * 1983-06-24 1984-12-28 Messerschmitt Boelkow Blohm METHOD FOR PROCESSING THE OUTPUT SIGNAL OF AN OPTICAL SENSOR OF TERRESTRIAL HORIZONS OF A GEOSTATIONARY SATELLITE

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