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POSITIONING ROLL [5 records]

Record 1 2012-07-06

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
  • Aircraft Piloting and Navigation
  • Navigation Instruments
  • Launching and Space Maneuvering
CONT

Embedded GPS INS. The EGI is in an all-attitude navigation system providing outputs of linear and angular acceleration, velocity, position, attitude(roll, pitch, and platform azimuth), magnetic and true heading, altitude, time tags, and time. When installed in the host platforms in the appropriate configuration, the system provides the navigation functions of the equipment it replaces. It uses vehicle electrical power(28 Vdc), turn-on and mode commands, initialization data, and altitude data, as well as Global Positioning System(GPS) satellite inputs for GPS or GPS/Inertial Navigation System(INS) operation, and is able to track five space vehicles simultaneously.

OBS

Attitude. The angle between an imaginary line running from the nose to the tail, and the horizontal. The attitude is judged by the level at which the horizon is seen through the canopy.

Key term(s)
  • all attitude navigation system
  • all attitude reference system
  • all-attitude flight reference system

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Pilotage et navigation aérienne
  • Instruments de navigation
  • Lancement et manœuvres dans l'espace
CONT

GPS et INS intégrés. Le système EGI est un système de navigation toutes attitudes qui fournit un signal d'accélération linéaire et angulaire, de vitesse, de position, d'attitude (roulis, tangage et azimut de plate-forme), un cap magnétique et vrai, l'altitude, les descripteurs temps et l'heure. Lorsqu'il est installé dans les plates-formes hôtes sous sa configuration appropriée, le système fournit les fonctions de navigation de l'équipement qu'il remplace. Il utilise le courant électrique de l'aéronef (28 V CC), les commandements de mise en marche et de mode, les données d'initialisation ainsi que les données d'altitude de même que les entrées satellites du système de positionnement global (GPS) pour le fonctionnement en GPS ou en GPS/système de navigation par inertie (INS) et peut poursuivre cinq véhicules spatiaux simultanément.

Spanish

Save record 1

Record 2 2002-07-05

English

Subject field(s)
  • Navigation Instruments
  • Electronic Measurements
  • Applications of Electronics
CONT

Accurate positioning of the aircraft is essential during image acquisition. Accuracy of ± 1 m is achieved using a DGPS. Downelling irradiance is recorded so as to take into account the space-time variations in the solar altitude and the transparency of the atmosphere that occurs during image acquisition. A gyroscopic sensor records the data needed to correct the geometric distortions of the images. These distortions are due to variations in the attitude of the aircraft(essentially the roll). The ground resolution depends on the altitude from which the images are collected.

French

Domaine(s)
  • Instruments de navigation
  • Mesures électroniques
  • Applications de l'électronique
CONT

Car Navigation. Ce système peut localiser l'endroit précis où vous vous trouvez grâce au système mondial de localisation GPS, à un capteur gyroscopique intégré et à un indicateur de vitesse à étalonnage automatique. Le système de navigation mobile se sert de techniques de pointe pour déterminer votre emplacement exact sur la carte.

Spanish

Save record 2

Record 3 2001-08-15

English

Subject field(s)
  • Metrology and Units of Measure
  • Aircraft Piloting and Navigation
  • Navigation Instruments
DEF

Dynamic measurement unit. Provides measurements of accelerations along three orthogonal axes and rotation rates around three orthogonal axes.

CONT

The DMU-6 is an intelligent six axis measurement system designed for accurate acceleration and angle measurement in dynamic environments... Example applications include GPS navigation, dynamic positioning, and automotive testing. The DMU-VG outputs stabilized pitch and roll calculations in addition to the DMU-6 outputs, ideal for camera or platform stabilization.

French

Domaine(s)
  • Unités de mesure et métrologie
  • Pilotage et navigation aérienne
  • Instruments de navigation

Spanish

Save record 3

Record 4 1993-12-23

English

Subject field(s)
  • Papermaking Machines
  • Paper Manufacturing Processes
CONT

Most paper machines have three to five independently-felted dryer sections, each with independent speed control to maintain sheet tension between sections and adjust for any sheet shrinkage that occurs. All top and bottom felt runs are equipped with tensioning and positioning rolls.

French

Domaine(s)
  • Machines à papier
  • Fabrication du papier
CONT

Sur la plupart des machines à papier, on regroupe les cylindres dans trois ou cinq sections de feutres indépendantes dont on peut régler séparément la vitesse pour maintenir la feuille en tension entre deux sections et compenser son retrait. On installe des rouleaux positionneurs et des rouleaux tendeurs dans chaque boucle du feutre.

Spanish

Save record 4

Record 5 1985-12-16

English

Subject field(s)
  • Micrographics
DEF

Roll film having sprocket holes accurately located along one or both edges to aid in transporting and positioning the film for successive exposures in a camera. Earlier designs of microfilm cameras utilized the perforations in advancing the film. Since the presence of the perforations substantially reduced the usable area of the film, most contemporary camera designs utilize film-advance mechanisms that do not require perforations in the film.

French

Domaine(s)
  • Micrographie
DEF

film en rouleau percé de trous d'entraînement placés de façon précise sur un ou sur les deux côtés du film afin de faciliter le transport et le positionnement du film pour les expositions successives dans une caméra. Dans les premières caméras microfilm les perforations servaient à faire avancer le film. Parce que la présence de ces perforations réduisait de beaucoup la portion utilisable du film, la plupart des caméras microfilm modernes sont munies de mécanismes d'avancement du film qui ne requièrent pas la perforation du film.

Spanish

Save record 5

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