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INFRARED HORIZON SENSOR [1 record]
Record 1 - internal organization data 2007-02-05
Record 1, English
Record 1, Subject field(s)
- Spacecraft
- Applications of Electronics
- Aircraft Piloting and Navigation
Record 1, Main entry term, English
- horizon sensor
1, record 1, English, horizon%20sensor
correct, officially approved
Record 1, Abbreviations, English
Record 1, Synonyms, English
- infrared horizon sensor 2, record 1, English, infrared%20horizon%20sensor
correct
- infra-red horizon sensor 3, record 1, English, infra%2Dred%20horizon%20sensor
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A radiometer or other sensor that is used to align or control the axis of a spacecraft, missile, or satellite with the apparent horizon of the Earth or of any other astronomical body. 4, record 1, English, - horizon%20sensor
Record number: 1, Textual support number: 1 CONT
Horizon sensors [are] the primary means for directly determining the attitude of a spacecraft relative to the Earth ... The attitude of spacecraft relative to Earth is one of the most important aspects of attitude determination and control, particularly for communications (TDRSS), weather (GOES), Earth resources (LANDSAT), satellites, etc. Earth cannot be treated as a point source like the Sun, especially for near Earth satellites for which Earth covers about 40% of the sky. Therefore, merely detecting the Earth is by no means sufficient for attitude determination, even for the most crude attitude determination requirements. Hence most sensors are designed to detect the Earth's horizon. Horizon sensors are infrared devices that detect the contrast of the cold of space and the warmth of the Earth (or other body). 5, record 1, English, - horizon%20sensor
Record number: 1, Textual support number: 2 CONT
Typically there are four basic components in a horizon sensor: a scanning mechanism, optical system, radiance detector, and signal processing electronics. 5, record 1, English, - horizon%20sensor
Record number: 1, Textual support number: 1 OBS
horizon sensor: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG). 6, record 1, English, - horizon%20sensor
Record 1, Key term(s)
- infra red horizon sensor
Record 1, French
Record 1, Domaine(s)
- Engins spatiaux
- Applications de l'électronique
- Pilotage et navigation aérienne
Record 1, Main entry term, French
- capteur d'horizon
1, record 1, French, capteur%20d%27horizon
correct, masculine noun, officially approved
Record 1, Abbreviations, French
Record 1, Synonyms, French
- détecteur d'horizon 2, record 1, French, d%C3%A9tecteur%20d%27horizon
correct, masculine noun
- détecteur d'horizon infrarouge 3, record 1, French, d%C3%A9tecteur%20d%27horizon%20infrarouge
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Scanneur mécanique à détecteurs électro-optiques montés de façon à repérer l'horizon terrestre. 4, record 1, French, - capteur%20d%27horizon
Record number: 1, Textual support number: 1 CONT
Garde-cap. Il s'agit d'un gyroscope que l'on maintient horizontal et qui définit une direction fixe dans le plan horizontal à sa dérive près. Le gyroscope est monté à la Cardan comme dans le cas du compas mais il n'est pas balourdé. Un détecteur d'horizon monté sur la caisse de tore délivre un signal proportionnel à l'inclinaison du moment cinétique; ce signal est traité et est envoyé dans un moteur couple d'axe ce qui crée un couple vertical ramenant le moment cinétique horizontal. 5, record 1, French, - capteur%20d%27horizon
Record number: 1, Textual support number: 2 CONT
[...] un système de contrôle d'attitude et d'orbite qui comprend : [...] un capteur optique 2-axes qui peut détecter soit la Terre (typiquement capteur d'horizon Infra-Rouge) soit l'Étoile Polaire (typiquement capteur à matrice CCD). 6, record 1, French, - capteur%20d%27horizon
Record number: 1, Textual support number: 1 OBS
capteur d'horizon : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR). 7, record 1, French, - capteur%20d%27horizon
Record 1, Spanish
Record 1, Textual support, Spanish
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