TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

The aim of the attitude control system is to always keep the satellite in the correct position or "attitude, "with the antennas pointing toward the Earth, and the solar panel array pointing toward the Sun... In a three-axis stabilization system, a gyroscope in each of the three planes is used to control the satellite attitude.  2, fiche 1, Anglais, - three%2Daxis%20stabilization%20system

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Étant donné que les panneaux doivent pivoter pour faire constamment face au Soleil et que, par contre, les antennes doivent être orientées vers la Terre, il faut que le satellite soit stable. Aussi a-t-on conçu un système de stabilisation sur trois axes, où les moindres déviations sont corrigées par de petits moteurs à hydrazine.  1, fiche 1, Français, - syst%C3%A8me%20de%20stabilisation%20sur%20trois%20axes

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 CONT

The applications all involve satellites... capable of pointing their instruments or sensors toward the Earth [thus a stabilization or orientation control system is required. ]  2, fiche 2, Anglais, - orientation%20control%20system

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 OBS

[...] le système de stabilisation du satellite comportant l'électronique de réglage d'attitude [...] est en mesure d'exécuter correctement toutes les manœuvres d'attitude et de changement de position  1, fiche 2, Français, - syst%C3%A8me%20de%20stabilisation

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

An alternative and less costly aiming system is already with us. This is the laser pointing sight which acts as a thin "searchlight" beam indicating the point of aim(the beam may be either visible to the naked eye or invisible and requiring some form of vision device).  1, fiche 3, Anglais, - searchlight%20beam

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

[Le système de conduite de tir] s'agit du laser de visée qui se comporte comme une lampe-torche à faisceau très fin servant à marquer le point visé (le faisceau est visible soit à l'œil nu, soit seulement à l'aide d'un système de vision spécial).  1, fiche 3, Français, - lampe%2Dtorche%20%C3%A0%20faisceau

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 CONT

More elaborate pointing devices make use of computer programs that display a virtual keyboard or a menu of choices. A person wears a pointer or manipulates a mouse to pick out a selection on the screen, then an adapted switch is used to click the mouse button. A person who cannot talk might use this system to express synthetic voice messages stored in the computer.  3, fiche 4, Anglais, - adapted%20switch

Fiche 4,  Justifications,  Français

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 OBS

pointing and stabilization system; PSS : term and abbreviation standardized by NATO.  3, fiche 5, Anglais, - pointing%20and%20stabilization%20system

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 OBS

système de pointage et de stabilisation; PSS : terme et abréviation normalisés par l'OTAN.  3, fiche 5, Français, - syst%C3%A8me%20de%20pointage%20et%20de%20stabilisation

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

Record number: 6, Textual support number: 1 DEF

A system in which a mechanism controlled by the echo automatically keeps the radar beam pointing at an object moving relative to the radar set.  2, fiche 6, Anglais, - automatic%20aiming

Fiche 6,  Justifications,  Français

Fiche 6,  Justifications,  Espagnol

Fiche 7,  Justifications,  Anglais

Record number: 7, Textual support number: 1 CONT

As the aircraft approaches the poles(90°), cos [phi] approaches zero, so that the computation of longitude leads to a singularity. Consequently, a physical limitation arise in the computation of the azimuth gyroscope torquing command. That is, the rate at which the inertial platform must be rotated about the vertical axis in order to maintain one of its level axes pointing north(this is the so-called "north-slaved" system;...  1, fiche 7, Anglais, - north%2Dslaved%20system

Record number: 7, Textual support number: 1 OBS

north-slaved: Designation for systems which physically track the direction of north by rotating the platform.  2, fiche 7, Anglais, - north%2Dslaved%20system

Fiche 7,  Justifications,  Français

Record number: 7, Textual support number: 1 OBS

Le gyroscope «1 axe» à suspension hydrostatique [...] Exemple d'application : le chercheur de nord Teldix NSK 40. Il s'agit essentiellement d'un gyroscope GWK 281 équipé d'un rappel élastique le transformant en gyromètre, dont le boîtier est suspendu au cardan de manière à pouvoir : obtenir l'alignement de son axe de sortie avec la verticale locale, par effet pendulaire; subir une rotation quelconque autour d'un axe d'azimut, sensiblement vertical, lié au boîtier de l'ensemble. La recherche du nord est effectuée par un asservissement dont l'élément détecteur est le gyromètre (axe d'entrée E), et dont le moteur agit sur sa suspension, de manière à faire balayer le plan horizontal par E.  2, fiche 7, Français, - syst%C3%A8me%20chercheur%20de%20nord

Fiche 7,  Justifications,  Espagnol

Fiche 8,  Justifications,  Anglais

Record number: 8, Textual support number: 1 CONT

The reason is delayed delivery, from Dornier in West Germany, of the Instrument Pointing System for ultra-precise aiming of astronomical sensors.  1, fiche 8, Anglais, - astronomical%20sensor

Fiche 8,  Justifications,  Français

Fiche 8,  Justifications,  Espagnol

Fiche 11,  Justifications,  Anglais

Record number: 11, Textual support number: 1 CONT

The Attitude Determination and Control System (ADCS) deals with the satellite attitude in space. The satellite attitude varies depending on the configuration, and it is determined and controlled by mission fulfillment.  2, fiche 11, Anglais, - attitude%20determination%20and%20control%20system

Record number: 11, Textual support number: 2 CONT

Attitude Determination and Control System. RADARSAT-2 is a 3-axis stabilised, zero-momentum satellite. Various sensors and actuators determine and maintain the spacecraft's orientation, and ensure that the spacecraft meets its performance requirements for precisely pointing the SAR Antenna in either left-or right-looking mode and for controlling the transition between these two modes.  3, fiche 11, Anglais, - attitude%20determination%20and%20control%20system

Record number: 11, Textual support number: 1 OBS

attitude determination and control system; ADCS: term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  4, fiche 11, Anglais, - attitude%20determination%20and%20control%20system

Fiche 11,  Justifications,  Français

Record number: 11, Textual support number: 1 DEF

Système servant au maintien d'attitude du satellite.  2, fiche 11, Français, - syst%C3%A8me%20de%20d%C3%A9termination%20et%20de%20commande%20d%27attitude

Record number: 11, Textual support number: 1 OBS

système de détermination et de commande d'attitude; ADCS : terme et abréviation uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, fiche 11, Français, - syst%C3%A8me%20de%20d%C3%A9termination%20et%20de%20commande%20d%27attitude

Fiche 11,  Justifications,  Espagnol

Fiche 12,  Justifications,  Anglais

Record number: 12, Textual support number: 1 OBS

pointing system : The Instrument Pointing System(IPS) was specifically designed by the European Space Agency to provide 2 arc seconds of accuracy... for many different kinds of payloads; such as a single large instrument or a cluster of smaller instruments.  2, fiche 12, Anglais, - small%20pointing%20system

Fiche 12,  Justifications,  Français

Fiche 12,  Justifications,  Espagnol

Fiche 13,  Justifications,  Anglais

Record number: 13, Textual support number: 1 OBS

Riddler is the original clue-dropping criminal. He delights in challenging Batman and Robin with his puzzles that he leaves behind at crime scenes, always pointing to where he will be next. Just as Batman and Robin do not go at crime-fighting alone, Gotham City's most notorious villains need fellow partners in crime to assist them with their malicious schemes. The Molehill Mob-infamous gang of hoods that hid out in Gotham City's labyrinthine subway system.  1, fiche 13, Anglais, - Molehill%20Mob

Fiche 13,  Justifications,  Français

Fiche 13,  Justifications,  Espagnol

Fiche 14,  Justifications,  Anglais

Record number: 14, Textual support number: 1 DEF

The part of an interactive system responsible for providing the user with information about the workings of the program on request. Help can be obtained in a number of ways : by typing the word "help", by pressing a particular function key on the keyboard, or by using a mouse or other pointing device to select a "help" item from a menu.  3, fiche 14, Anglais, - help%20system

Record number: 14, Textual support number: 1 CONT

A help system supports the user in handling and mastering an information processing system. ... A comprehensive help system not only answers questions of users, but also "looks over their shoulders" and interrupts when appropriate.  2, fiche 14, Anglais, - help%20system

Record number: 14, Textual support number: 2 CONT

One of the problems with traditional assistance systems is that users have to often formulate their requests for help in terms of [Bstem commands and keywords which they may not remember or even know in the first place. ... An effective assistant must, therefore, have the capability to interpret user queries which are posed in natural language, so that users are not burdened wit the task of translating their requests in terms of system terminology.  2, fiche 14, Anglais, - help%20system

Fiche 14,  Justifications,  Français

Record number: 14, Textual support number: 1 DEF

Textes d'aide pour un programme d'application, incorporés à un système permettant, par exemple, de se déplacer à travers les différents textes vers l'avant et vers l'arrière. Il dispose également d'un index des sujets traités ainsi que de références à d'autres sujets. Contrairement aux fichiers d'aide habituels, un système d'aide est généralement piloté par des options particulières de menus.  2, fiche 14, Français, - syst%C3%A8me%20d%27aide

Record number: 14, Textual support number: 1 CONT

Le système d'aide à l'utilisateur vise à réaliser une interface homme/machine intelligente qui assiste l'élève dans l'emploi du didacticiel. Son objectif principal est d'accélérer le temps d'apprentissage du logiciel. Un objectif secondaire du système d'aide est de réaliser un système sans manuel, c'est-à-dire un système où il n'est pas nécessaire d'avoir lu la documentation pour s'en servir.  3, fiche 14, Français, - syst%C3%A8me%20d%27aide

Fiche 14,  Justifications,  Espagnol

Record number: 14, Textual support number: 1 DEF

Parte de un sistema interactivo, responsable de ofrecer al usario la información solicitada sobre cómo trabajar con un programa.  1, fiche 14, Espagnol, - sistema%20de%20ayuda

Fiche 15,  Justifications,  Anglais

Record number: 15, Textual support number: 1 CONT

The U. S. power system comprises two 32. 8-m-long solar arrays, six nickel-hydrogen batteries, and the associated power distribution equipment to ultimately supply the station with approximately 18. 75 kW. Since activation, the power system has performed virtually flawlessly, with the exception of some minor anomalies associated with the mechanisms used for continuously pointing the solar arrays at the Sun. When all four of the photovoltaic modules and the Russian science power platform are installed, ISS [International Space Station] power will be approximately 110 kW.  2, fiche 15, Anglais, - Russian%20science%20power%20platform

Record number: 15, Textual support number: 1 OBS

Russian science power platform: term officially approved by the International Space Station official approval Group (ISSOAG).  3, fiche 15, Anglais, - Russian%20science%20power%20platform

Fiche 15,  Justifications,  Français

Record number: 15, Textual support number: 1 OBS

La Russie, outre Zaria, doit fournir le module de service [...], trois compartiments d'arrimage [...], une plate-forme d'expérimentation scientifique dotée de panneaux solaires [...], deux modules de recherche [...], ainsi que deux vaisseaux Soyouz.  2, fiche 15, Français, - plateforme%20russe%20d%27exp%C3%A9rimentation%20scientifique

Record number: 15, Textual support number: 2 OBS

plateforme russe d'expérimentation scientifique : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).  1, fiche 15, Français, - plateforme%20russe%20d%27exp%C3%A9rimentation%20scientifique

Fiche 15,  Justifications,  Espagnol

Fiche 16,  Justifications,  Anglais

Record number: 16, Textual support number: 1 CONT

Inertial Stellar Compass Concept. ISC technology has artificial intelligence capabilities which will keep a spacecraft on course by providing attitude information to keep it stable and pointing accurately. It will also help the spacecraft recover from unexpected events, a temporary malfunction or power loss. To do that, the compass uses information from the camera-gyro assembly(CGA), which consists of two miniaturized devices : a star camera(or star tracker) to tell the spacecraft where it is pointing; gyroscopes to continuously monitor the spacecraft's motion. The gyroscopes also inform the control system how to keep the spacecraft stable and pointed in the right direction in case the camera is "blinded" by the Sun. The information gathered is compared with a large stellar catalog stored in the data processor assembly(DPA). Using a special algorithm the DPA determines the attitude accurately. This way the spacecraft's attitude is maintained correctly.  2, fiche 16, Anglais, - inertial%20stellar%20compass

Fiche 16,  Justifications,  Français

Record number: 16, Textual support number: 1 CONT

La NASA a signé un contrat avec la société privée Team Encounter pour qu'elle embarque l'expérience ISC (Inertial Stellar Compass) sur sa voile solaire qui doit être lancée en 2004 ou 2005. L'ISC est un système innovant de détermination de l'attitude conçu par le laboratoire Charles Stark Draper de Cambridge [...] L'IST combine une caméra stellaire avec des gyros à Mems.  3, fiche 16, Français, - syst%C3%A8me%20de%20navigation%20ISC

Fiche 16,  Justifications,  Espagnol

Fiche 17,  Justifications,  Anglais

Record number: 17, Textual support number: 1 CONT

In order to sustain the required technological development, ESA issued two Invitations To Tender on Active Pointing of Large Telescopes(APLT) and Attitude Measurement Transfer System(AMTS), awarded to a proposal led by Alenia Spazio(Prime Contractor).  2, fiche 17, Anglais, - attitude%20measurement%20transfer%20system

Fiche 17,  Justifications,  Français

Fiche 17,  Justifications,  Espagnol

Fiche 18,  Justifications,  Anglais

Record number: 18, Textual support number: 1 CONT

Many of the antennas on board communications spacecraft in geostationary orbit are fixed. Some applications for antennas require the ability to point at different areas. These antennas could be used to support a developing regional communication system after a natural disaster or to support a mobile activity. A new spacecraft antenna pointing mechanism concept is to be investigated. The mechanism could use actuators or similar devices which are configured as a "plunger" or a single axis rotary device. The aim of the project is to configure the pointing mechanism to ensure it is capable of pointing a one metre diameter antenna, with full earth coverage.  3, fiche 18, Anglais, - antenna%20pointing%20mechanism

Fiche 18,  Justifications,  Français

Fiche 18,  Justifications,  Espagnol

Fiche 19,  Justifications,  Anglais

Record number: 19, Textual support number: 1 CONT

Performed payload integration study to ensure Annular Suspension Pointing System(a three axis gimbal system with magnetic isolation) compatibility with large facility class payloads.  3, fiche 19, Anglais, - annular%20suspension%20pointing%20system

Fiche 19,  Justifications,  Français

Fiche 19,  Justifications,  Espagnol

Fiche 20,  Justifications,  Français

Fiche 20,  Justifications,  Espagnol

Fiche 21,  Justifications,  Anglais

Record number: 21, Textual support number: 1 DEF

An electronic theodolite which determines the direction of a radio transmitter carried by a free balloon in the atmosphere.  3, fiche 21, Anglais, - radiotheodolite

Record number: 21, Textual support number: 1 CONT

RDF [radio direction finding] systems use a tracking device called a radio theodolite to measure the position of the balloon relative to the ground station. The radio theodolite, which resembles a small tracking radar system, measures the azimuth and elevation angles to the radiosonde relative to the ground station. The radio theodolite automatically follows the motion of the balloon by tracking the primary lobe of the radiosonde's transmitter, making adjustments to the tilt and pointing direction of the antenna as it follows the signal from the sonde.  2, fiche 21, Anglais, - radiotheodolite

Fiche 21,  Justifications,  Français

Record number: 21, Textual support number: 1 DEF

Théodolite électronique qui détermine la direction d'un émetteur radioélectrique emporté par un ballon libre dans l'atmosphère.  2, fiche 21, Français, - radioth%C3%A9odolite

Record number: 21, Textual support number: 1 CONT

Les mesures en altitude effectuées par les stations de radiosondage sont utilement complétées par des mesures de vent réalisées à l'aide de radar, de radiothéodolites, de procédés optiques, de systèmes de navigation radioélectriques, ou encore de satellites géostationnaires.  3, fiche 21, Français, - radioth%C3%A9odolite

Fiche 21,  Justifications,  Espagnol

Record number: 21, Textual support number: 1 DEF

Teodolito electrónico para determinar la posición en el espacio de un transmisor de radio transportado por un globo libre.  1, fiche 21, Espagnol, - radioteodolito

Fiche 22,  Justifications,  Anglais

Record number: 22, Textual support number: 1 CONT

For missions requiring full three-axis attitude control, the SSTL [Surrey Satellite Technology Ltd. ] Microsatellite can be equipped with a zero-bias reaction-wheel attitude control system fed by a single SSTL Astrolabe star camera for attitude determination. This system can attain pointing accuracy of 1 arc-minute in all axes. It can be designed for astronomical pointing, Sun pointing, or Earth pointing with slewing and target tracking.  2, fiche 22, Anglais, - three%2Daxis%20control

Fiche 22,  Justifications,  Français

Fiche 22,  Justifications,  Espagnol

Fiche 23,  Justifications,  Anglais

Record number: 23, Textual support number: 1 OBS

System used aboard the European Space Agency Spacelab.  3, fiche 23, Anglais, - instrument%20pointing%20system

Fiche 23,  Justifications,  Français

Record number: 23, Textual support number: 1 OBS

système de pointage d'instruments : terme uniformisé par le Comité d'uniformisation de la terminologie spatiale (CUTS).  3, fiche 23, Français, - syst%C3%A8me%20de%20pointage%20d%27instruments

Fiche 23,  Justifications,  Espagnol

Fiche 24,  Justifications,  Anglais

Record number: 24, Textual support number: 1 CONT

Spacecraft with more stringent pointing requirements use active attitude control systems. In an active attitude control system, mechanisms are used to deliberately apply a torque to the spacecraft. The mechanisms used to control attitude include momentum wheels, magnetic torquers, and thrusters. Momentum wheel control systems alter the attitude of a spacecraft by varying the speed at which the wheel spins.  2, fiche 24, Anglais, - active%20attitude%20control%20system

Fiche 24,  Justifications,  Français

Fiche 24,  Justifications,  Espagnol

Fiche 25,  Justifications,  Anglais

Record number: 25, Textual support number: 1 CONT

Waves are formed due to the friction of the wind over the water surface. The three main components for wave generation are the wind speed, it's duration and fetch.... How to recognise a swell/wave generating area. On a weather chart there are high and low pressure systems. They are separated by isobars(lines joining places of equal pressure). Buys Ballot's law states :"If you stand with your back to the wind in the northern hemisphere, the low pressure will be on your left. "From this you can deduce the wind flows anticlockwise around a low pressure system and almost parallel to the isobars. The wind near the surface actually flows at an angle of about 15 degrees to the isobars pointing in to the low. The reason for this is that friction with the surface slows the air down and it is this friction which causes waves to form. Assuming you have identified an area of closely packed isobars which are almost straight for 200 miles and the low system is not changing to quickly, you have found a good swell generating area.  3, fiche 25, Anglais, - wave%20generation%20area

Record number: 25, Textual support number: 2 CONT

Wave generation area described in terms of fetch length ...  4, fiche 25, Anglais, - wave%20generation%20area

Record number: 25, Textual support number: 1 OBS

fetch length: The horizontal distance (in the direction of the wind) over which a wind generates seas.  5, fiche 25, Anglais, - wave%20generation%20area

Fiche 25,  Justifications,  Français

Record number: 25, Textual support number: 1 DEF

Zone de l'océan sur laquelle les vents, soufflant dans la même direction pendant un temps plus ou moins long avec une force constante, engendrent une mer du vent dont les vagues sortent de l'aire et forment la houle.  2, fiche 25, Français, - aire%20de%20g%C3%A9n%C3%A9ration%20de%20la%20houle

Fiche 25,  Justifications,  Espagnol

Fiche 26,  Justifications,  Anglais

Record number: 26, Textual support number: 1 CONT

The activation of the Station's Ku-Band antenna is on standby until procedures are put in place for a possible software patch to account for an apparent pointing error with the dish-shaped antenna. The Ku Band system is used to transmit television, voice and high-speed data to the ground. Normal communication is being managed through the S-Band audio system. Any required TV images, in the meantime, can be accommodated through the use of the laptop computer-based digital video system. Until that problem is corrected, transmission of experiment data from the Human Research Facility experiment rack in the Destiny laboratory is on hold.  2, fiche 26, Anglais, - Ku%2Dband%20antenna

Record number: 26, Textual support number: 1 OBS

Ku-band antenna: term officially approved by the International Space Station official approval Group (ISSOAG).  3, fiche 26, Anglais, - Ku%2Dband%20antenna

Fiche 26,  Justifications,  Français

Record number: 26, Textual support number: 1 CONT

On a remis à plus tard l'activation de l'antenne en bande Ku de la Station. On attend que soient établies les procédures selon lesquelles un sous-programme de correction puisse venir à bout d'une erreur apparente de pointage de l'antenne parabolique. Le système en bande Ku sert à l'émission vers la Terre de signaux de télévision, vocaux et à haut débit. Les communications courantes sont présentement assurées par le système audio en bande S. Dans l'intervalle, les images télévisuelles peuvent être transmises via le système vidéo numérique fonctionnant sur ordinateur portable. D'ici à ce que le problème soit corrigé, la transmission des données provenant du bâti d'expérimentation Human Research Facility contenu dans le laboratoire Destiny.  2, fiche 26, Français, - antenne%20en%20bande%20Ku

Record number: 26, Textual support number: 1 OBS

antenne en bande Ku : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).  3, fiche 26, Français, - antenne%20en%20bande%20Ku

Fiche 26,  Justifications,  Espagnol

Fiche 27,  Justifications,  Anglais

Record number: 27, Textual support number: 1 CONT

The on-orbit Attitude Determination and Control Subsystem(ADACS) provides three axis pointing control for the satellite. The ADACS maintains system pointing by controlling torque in three mutually orthogonal wheels. The torque is determined by analysis of spacecraft orientation in space. Input to these computations are acquired from the Earth Sensor Assembly(ESA) for pitch and roll, and an inertial reference with sun sensor updates for yaw.  2, fiche 27, Anglais, - inertial%20reference

Fiche 27,  Justifications,  Français

Record number: 27, Textual support number: 1 CONT

Ce chapitre concerne l'étude fine d'un gyroscope [...], monté à 3 degrés de liberté [...] grâce à 2 armatures de Cardan. L'appareil est «le passager» d'une plate-forme stabilisée [...], d'orientation fixe dans un repère inertiel. I Description du montage : 1°) La plate-forme : [...] est un solide [...], emporté dans un véhicule (avion, sous marin, lanceur etc...), et conservant une orientation fixe par rapport à un repère inertiel. Ce qui ne veut pas dire que [la plate-forme stabilisée] est en translation uniforme, simplement en translation quelconque, avec accélération et vitesse.  3, fiche 27, Français, - r%C3%A9f%C3%A9rence%20inertielle

Record number: 27, Textual support number: 2 CONT

Équipement de navigation. Ce type d'équipement guide l'aéronef vers son lieu de destination et intègre de nombreux produits tels que les systèmes de positionnement mondial [(...] GPS), la centrale anémobarométrique, qui calcule la vitesse aérodynamique, l'altitude et la vitesse verticale de l'appareil, les IRS («Inertial Reference System» - systèmes de référence inertielle) - qui sont les principaux capteurs de mouvement et de navigation de la cellule utilisés par un nombre très élevé de systèmes avioniques [...]  4, fiche 27, Français, - r%C3%A9f%C3%A9rence%20inertielle

Fiche 27,  Justifications,  Espagnol

Fiche 28,  Justifications,  Anglais

Record number: 28, Textual support number: 1 CONT

With a new helmet-mounted gunsight developed by Honeywell, all a chopper pilot has to do is look at an enemy target and fire his cannon. The cannon instantly lines up on the target, automatically following his line of sight no matter which way he moves his head.  1, fiche 28, Anglais, - helmet%20mounted%20gunsight

Fiche 28,  Justifications,  Français

Fiche 28,  Justifications,  Espagnol

Fiche 29,  Justifications,  Français

Fiche 29,  Justifications,  Espagnol

Fiche 30,  Justifications,  Anglais

Record number: 30, Textual support number: 1 CONT

The satellite's integral propulsion system uses monomethyl hydrazine and nitrogen tetroxide bipropellant carried in four spherical titanium tanks. A single 490-newton(110-pound force) thruster is used for perigee augmentation and apogee burns, and thirteen 22-newton(5-pound force) thrusters are used for attitude control and stationkeeping maneuvers. Highly accurate antenna pointing control is provided by independent beacon tracking on each of the Ku-band reflector systems. The attitude control system uses an innovative combination of double-gimballed momentum wheels and magnetic field torquing, which minimizes the need for thruster use during normal on-station operations.  3, fiche 30, Anglais, - double%2Dgimballed%20momentum%20wheel

Fiche 30,  Justifications,  Français

Fiche 30,  Justifications,  Espagnol

Fiche 31,  Justifications,  Français

Fiche 31,  Justifications,  Espagnol

Fiche 32,  Justifications,  Anglais

Record number: 32, Textual support number: 1 CONT

... a special goals window reminds the student about the current goal in solving the problem.  3, fiche 32, Anglais, - goals%20window

Record number: 32, Textual support number: 2 CONT

A ... Goals window reminds the student about the current goal in the problem-solving.  4, fiche 32, Anglais, - goals%20window

Record number: 32, Textual support number: 3 CONT

...a "goal window" was included in which a student was required to "post" the goal(s) she was working on before selecting operators. ... An open box around a node indicates the goal currently being worked on, and a closed box ... indicates that a goal has been satisfied.  2, fiche 32, Anglais, - goals%20window

Record number: 32, Textual support number: 4 CONT

... goal-posting improved problem-solving performance... we should include a goal window in our problem-solving environments and... this will facilitate student learning...... how can the information provided by interactions with a goal window be used by an ITS [intelligent tutoring system] to carry on discussions about the student's goals?... The student's progress through the plans is automatically marked in the goal window(the tick indicating achieved plans, the arrow pointing to the current goal).  2, fiche 32, Anglais, - goals%20window

Fiche 32,  Justifications,  Français

Record number: 32, Textual support number: 1 DEF

Espace-écran dans lequel sont affichés, à l'intention de l'apprenant, les buts visés par l'exercice de résolution de problème en cours.  2, fiche 32, Français, - zone%20d%27affichage%20des%20buts

Fiche 32,  Justifications,  Espagnol

Fiche 33,  Justifications,  Français

Fiche 33,  Justifications,  Espagnol

Fiche 34,  Justifications,  Anglais

Record number: 34, Textual support number: 1 CONT

Aérospatiale has now developed the SOFA(système d’orientation fine d’antenne) system for pointing spacecraft antennas with great accuracy, designed especially for use on geostationary telecommunications satellites.  1, fiche 34, Anglais, - SOFA%20system

Fiche 34,  Justifications,  Français

Record number: 34, Textual support number: 1 CONT

L'Aérospatiale a développé un système d'orientation fine d'antenne (SOFA) destiné tout particulièrement à assurer le pointage permanent de l'antenne d'un satellite géostationnaire de télécommunications.  3, fiche 34, Français, - syst%C3%A8me%20d%27orientation%20fine%20d%27antenne

Fiche 34,  Justifications,  Espagnol

Fiche 35,  Justifications,  Anglais

Record number: 35, Textual support number: 1 CONT

... the antenna pointing system is particularly important for the uninterrupted and reliable operation of earth stations. The facilities available for Intersputnik stations provide for three modes of operation :...  1, fiche 35, Anglais, - antenna%20pointing%20system

Fiche 35,  Justifications,  Français

Record number: 35, Textual support number: 1 CONT

[...] le système de pointage joue un rôle particulièrement important si l'on veut que ces stations fonctionnent en permanence de manière fiable. Les systèmes de poursuite dont sont équipées les stations [...] se prêtent à trois modes de fonctionnement [...]  1, fiche 35, Français, - syst%C3%A8me%20de%20pointage

Fiche 35,  Justifications,  Espagnol

Fiche 36,  Justifications,  Anglais

Record number: 36, Textual support number: 1 OBS

the feasibility of radio pointing systems (e.g. monopulse systems) on the spacecraft removes the beamwidth limitation over the range of frequencies considered here. [1188]  1, fiche 36, Anglais, - radio%20pointing%20system

Fiche 36,  Justifications,  Français

Record number: 36, Textual support number: 1 OBS

dans la gamme des fréquences considérées ici, l'ouverture du faisceau ne constitue plus une limitation, puisqu'on sait réaliser des dispositifs de pointage radioélectrique (par exemple, du type à impulsions codées) à bord des engins spatiaux. [trad]  1, fiche 36, Français, - dispositif%20de%20pointage%20radio%C3%A9lectrique

Fiche 36,  Justifications,  Espagnol

Fiche 37,  Justifications,  Anglais

Record number: 37, Textual support number: 1 CONT

The feasibility of radio pointing systems(e. g. monopulse system) on the spacecraft removes the beamwidth limitation over the range of frequencies considered here.  1, fiche 37, Anglais, - monopulse%20system

Fiche 37,  Justifications,  Français

Record number: 37, Textual support number: 1 CONT

Dans la gamme de fréquences considérée ici [...] on sait réaliser des dispositifs de pointage radioélectrique (par ex. du type à impulsions isolées) à bord des engins spatiaux.  1, fiche 37, Français, - dispositif%20de%20pointage%20radio%20%C3%A0%20impulsions%20isol%C3%A9es

Fiche 37,  Justifications,  Espagnol