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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,  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,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Communications outage recorder. The communications outage recorder(COR) will provide 240 hrs of payload data downlink coverage and will require the addition of a high rate data recorder which can be played back during tracking and data relay satellite system(TDRSS) access periods. Outage periods can be as long as 20 min with payload data downlink demands up to 40 Mbps during that period.  2, record 2, English, - communications%20outage%20recorder

Record number: 2, Textual support number: 1 OBS

communications outage recorder; COR: term and abbreviation officially approved by the International Space Station official approval Group (ISSOAG).  3, record 2, English, - communications%20outage%20recorder

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

enregistreur de panne de communication; COR : terme et abréviation uniformisés par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).  1, record 2, French, - enregistreur%20de%20panne%20de%20communication

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

NASCOM [NASA Communications Voice Control Center] is the "central nervous system" for all NASA's global communications network. Voice, data and teletype links are available through the network for connecting the Tracking and Data Relay Satellite System,(TDRSS) with user spacecraft control centers.  2, record 3, English, - user%20spacecraft%20control%20centre

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 OBS

The NASCOM network is a global system that provides communications support to all NASA projects. Voice, data, and teletype links are available through the network for connecting the Tracking and Data Relay Satellite System(TDRSS) with user spacecraft control centers. Land lines, submarine cables, and microwave/satellite links make up this communications system. The user services available from the Space network, which includes TDRSS and its supporting Goddard elements, are provided through NASCOM.  2, record 4, English, - NASA%20Communications%20Network

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 OBS

NASA  1, record 5, English, - Tracking%20and%20Data%20Relay%20Satellite%20System

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

Journal des télécommunications - 44-xl-77 (8554)  1, record 5, French, - Syst%C3%A8me%20%C3%A0%20satellites%20pour%20la%20poursuite%20de%20l%27engin%20spatial%20et%20la%20retransmission%20des%20donn%C3%A9es

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish