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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The acquisition sensor constantly scans from horizon to horizon using a large field of view, small aperture, and fast scan mode. When a potential target is detected, the acquisition sensor begins a two dimensional(2D) track and passes the detection to the tracking sensor, which verifies the target and continues the track.  1, record 1, English, - acquisition%20sensor

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Le nombre de plateformes pour SBIRS [Space-Based Infrared System] Low n'a pas encore été déterminé, mais elles utiliseront deux capteurs : un détecteur d'acquisition et un capteur de poursuite qui détecteront les signaux dans différentes zones infrarouges, courtes, moyennes ou longues et dans le spectre visible.  1, record 1, French, - d%C3%A9tecteur%20d%27acquisition

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, 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 2, English, - horizon%20sensor

Record number: 2, 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 2, English, - horizon%20sensor

Record number: 2, 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 2, English, - horizon%20sensor

Record number: 2, Textual support number: 1 OBS

horizon sensor : term officially approved by the RADARSAT-2 Terminology Approval Group(RTAG).  6, record 2, English, - horizon%20sensor

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Scanneur mécanique à détecteurs électro-optiques montés de façon à repérer l'horizon terrestre.  4, record 2, French, - capteur%20d%27horizon

Record number: 2, 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 2, French, - capteur%20d%27horizon

Record number: 2, 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 2, French, - capteur%20d%27horizon

Record number: 2, Textual support number: 1 OBS

capteur d'horizon : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  7, record 2, French, - capteur%20d%27horizon

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A device used to establish a spacecraft’s attitude relative to the Earth by detecting the limits of the Earth’s disk at infrared wavelength.  3, record 3, English, - Earth%20sensor

Record number: 3, Textual support number: 1 OBS

Sensing is either static or dynamic. The static sensor uses a common direction-sensing technique involving an arrangement of sensors grouped around the pointing axis so that they each receive the same illumination when the sensor is exactly aligned with the target-source.... The dynamic sensor operates by scanning across the Earth's disk and detecting the temperature difference between space and Earth. It is otherwise known as a "horizon sensor" or "horizon scanner".  3, record 3, English, - Earth%20sensor

Record number: 3, Textual support number: 2 OBS

Earth sensor: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  4, record 3, English, - Earth%20sensor

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 OBS

capteur d'horizon terrestre : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 3, French, - capteur%20d%27horizon%20terrestre

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The Conical Earth Sensor(CES) is a scanning horizon sensor used to gather attitude information on orbiting spacecraft. The most common application utilizes one or more CESs to provide pitch and roll attitude data for 3-axis stabilized orbiting spacecraft. The CES, a robust and a versatile sensor, can be used from low Earth orbit to above geosynchronous orbits, as well as during transfer orbits.  2, record 4, English, - scanning%20horizon%20sensor

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

The basic attitude sensor was the three-gyro inertial reference package. It contained two air-tight integrating gyro units to sense pitch and yaw, and one miniature integrating gyro unit to sense roll. The pitch and roll gyros were torqued by signals obtained by two Barnes mod IIA infrared horizon sensors. Gyrocompassing oriented the vehicle to an orbit plane yaw reference by detecting a component of the programmed pitch rate through the roll horizon sensor. The geocentric pitch rate(typically 4 deg/min, for a low-altitude orbit) was programmed as a constant torque to the pitch gyro. This pitch component, if a yaw error was present, would be sensed differentially when compared with the roll components of the two horizon-sensor heads. The differential would be seen as a function of yaw error.  2, record 5, English, - roll%20component

Record number: 5, Textual support number: 2 CONT

During heading align, the rotor of the resolver is positioned so that it transforms the N-S and E-W liquid level signals into pitch and roll components which are referenced to heading. The pitch component is amplified, demodulated and summed with amplified and demodulated feedback signals from the VG [vertical gyro] roll and pitch pickoffs and the pitch synchro. The combined signal is then modulated, amplified and converted to DC [direct current] to drive the platform pitch gimbal torque motor until the input signals are nulled.  1, record 5, English, - roll%20component

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

Durant l'alignement sur le cap, le rotor du résolver est mis en position de telle sorte qu'il transforme les signaux des niveaux à liquide N.-S. et E.-O. en composantes de tangage et de roulis en référence au cap. La composante de tangage est amplifiée, démodulée et composée avec des signaux de réaction amplifiés et démodulés venant des capteurs de roulis et de tangage du VG [gyroscope directionnel] et du synchro de tangage. Ce signal composé est alors modulé, amplifié et converti en courant continu pour entraîner le moteur couple du cardan de tangage de la plate-forme jusqu'à ce que les signaux d'entrée soient annulés.  2, record 5, French, - composante%20en%20roulis

Record number: 5, Textual support number: 2 CONT

Il s'agit de la rotation galiléenne mais [...] la rotation à annuler quand on souhaite obtenir un pointage Terre parfait est la rotation relative au repère orbital de composantes en roulis, tangage et lacet.  1, record 5, French, - composante%20en%20roulis

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

The basic attitude sensor was the three-gyro inertial reference package. It contained two air-tight integrating gyro units to sense pitch and yaw, and one miniature integrating gyro unit to sense roll. The pitch and roll gyros were torqued by signals obtained by two Barnes mod IIA infrared horizon sensors. Gyrocompassing oriented the vehicle to an orbit plane yaw reference by detecting a component of the programmed pitch rate through the roll horizon sensor. The geocentric pitch rate(typically 4 deg/min, for a low-altitude orbit) was programmed as a constant torque to the pitch gyro. This pitch component, if a yaw error was present, would be sensed differentially when compared with the roll components of the two horizon-sensor heads. The differential would be seen as a function of yaw error.  2, record 6, English, - pitch%20component

Record number: 6, Textual support number: 2 CONT

During heading align, the rotor of the resolver is positioned so that it transforms the N-S and E-W liquid level signals into pitch and roll components which are referenced to heading. The pitch component is amplified, demodulated and summed with amplified and demodulated feedback signals from the VG [vertical gyro] roll and pitch pickoffs and the pitch synchro. The combined signal is then modulated, amplified and converted to DC [direct current] to drive the platform pitch gimbal torque motor until the input signals are nulled.  3, record 6, English, - pitch%20component

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

Durant l'alignement sur le cap, le rotor du résolver est mis en position de telle sorte qu'il transforme les signaux des niveaux à liquide N.-S. et E.-O. en composantes de tangage et de roulis en référence au cap. La composante de tangage est amplifiée, démodulée et composée avec des signaux de réaction amplifiés et démodulés venant des capteurs de roulis et de tangage du VG [gyroscope directionnel] et du synchro de tangage. Ce signal composé est alors modulé, amplifié et converti en courant continu pour entraîner le moteur couple du cardan de tangage de la plate-forme jusqu'à ce que les signaux d'entrée soient annulés.  2, record 6, French, - composante%20en%20tangage

Record number: 6, Textual support number: 2 CONT

[...] il s'agit de la rotation galiléenne mais [...] la rotation à annuler quand on souhaite obtenir un pointage Terre parfait est la rotation relative au repère orbital de composantes en roulis, tangage et lacet.  1, record 6, French, - composante%20en%20tangage

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

The Sirius, a long range dual band sensor being developed by Signaal to reinforce radar horizon search capability against sea-skimming missiles, can use wedge stabilization.  1, record 7, English, - long%20range%20dual%20band%20sensor

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Un stabilisateur à coins stabilise par exemple le capteur thermique bi-bande à longue portée Sirius développé par Signaal comme complément à la veille de l'horizon radar contre les missiles à trajectoire rasante.  1, record 7, French, - capteur%20thermique%20bi%2Dbande%20%C3%A0%20longue%20port%C3%A9e

Record 7,  Textual support,  Spanish