TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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Many spacecraft use small rockets called thrusters to move around in space. Thrusters can change the speed and direction of a spacecraft. They allow a spacecraft to steer in space, to jump to a higher orbit, or to fall back to Earth.  4, fiche 1, Anglais, - thruster

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The control rocket is a vernier or other rocket used to control the attitude of, or slightly change the speed of, a spacecraft.  5, fiche 1, Anglais, - thruster

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The propulsion subsystem featured sets of small thrusters and a main engine. The thrusters were used to perform Odyssey’s attitude control and trajectory correction manoeuvres, while the main engine was used to place the spacecraft in orbit around Mars. The main engine, which used hydrazine propellant with nitrogen tetroxide as an oxidiser, produced a minimum thrust of 65.3 kilograms of force. Each of the four thrusters used for attitude control produce a thrust of 0.1 kilogram of force. Four 2.3-kilogram-force thrusters were used for turning the spacecraft. In addition to miscellaneous tubing, pyro valves and filters, the propulsion subsystem also included a single gaseous helium tank used to pressurise the fuel and oxidiser tanks. The propulsion subsystem weighed 49.7 kilograms.  4, fiche 1, Anglais, - thruster

Fiche 1,  Justifications,  Français

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Moteur-fusée de très petite poussée.  4, fiche 1, Français, - micropropulseur

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Des micropulseurs télécommandés développent des impulsions radiales axiales qui corrigent l'attitude ou la position du satellite sur son orbite.  2, fiche 1, Français, - micropropulseur

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On prévoit dans de nombreux satellites de petits propulseurs [...] dont les emplacements sont fixes.  5, fiche 1, Français, - micropropulseur

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Micropropulseur télécommandé.  6, fiche 1, Français, - micropropulseur

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 CONT

The Attitude and Vernier Upper Module. The Vega launch vehicle is equipped with a liquid propulsion module(AVUM), which provides roll control and pitch, yaw, and axial thrust during the final phase of flight. It shall perform the following functions :-roll control;-attitude control during coasting flight and in orbit phase;-correction of axial velocity error due to solid rocket motor performance scatter;-generation of the required velocity change for orbit circularisation(as required) ;-satellite pointing;-satellite release manoeuvres;-empty stage de-orbiting.  2, fiche 2, Anglais, - attitude%20and%20Vernier%20upper%20module

Fiche 2,  Justifications,  Français

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Enfin, on attend la signature du contrat de développement du petit lanceur Vega. Il s'agit d'un lanceur composé de trois étages à propergol solide, surmonté d'un module supérieur à liquide dit AVUM (Attitude and Vernier Upper Module) - permettant le contrôle d'attitude et d'orbite, la séparation des satellites et la désorbitisation - ainsi que d'une coiffe.  2, fiche 2, Français, - module%20sup%C3%A9rieur%20Vernier%2Fcommande%20d%27orientation

Fiche 2,  Justifications,  Espagnol