TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

The frequency shift observed at a receiver due to any relative motion between transmitter and receiver.  2, record 1, English, - Doppler%20shift

Record number: 1, Textual support number: 1 CONT

The Doppler frequency depends on the component of satellite velocity in the line-of-sight direction to the target. This direction changes with each satellite position along the flight path, so the Doppler frequency varies with azimuth time. For this reason, azimuth frequency is often referred to as Doppler frequency.  6, record 1, English, - Doppler%20shift

Record number: 1, Textual support number: 1 OBS

Doppler shift; Doppler frequency-shift: terms and definition officially approved by the International Civil Aviation Organization (ICAO).  8, record 1, English, - Doppler%20shift

Record number: 1, Textual support number: 2 OBS

Doppler shift: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  9, record 1, English, - Doppler%20shift

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Décalage de fréquence observé dans le récepteur, attribuable à tout déplacement de l'émetteur et du récepteur l'un par rapport à l'autre.  2, record 1, French, - d%C3%A9calage%20Doppler

Record number: 1, Textual support number: 1 OBS

déplacement Doppler-Fizeau : terme normalisé par l'AFNOR et reproduit avec son autorisation.  6, record 1, French, - d%C3%A9calage%20Doppler

Record number: 1, Textual support number: 2 OBS

décalage Doppler; décalage de fréquence par effet Doppler : termes et définition uniformisés par l'Organisation de l'aviation civile internationale (OACI).  6, record 1, French, - d%C3%A9calage%20Doppler

Record number: 1, Textual support number: 3 OBS

décalage Doppler : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  7, record 1, French, - d%C3%A9calage%20Doppler

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Desviación de frecuencia observada en un receptor debido al movimiento relativo de transmisor y receptor.  1, record 1, Spanish, - desviaci%C3%B3n%20Doppler

Record number: 1, Textual support number: 1 OBS

de desplazamiento de frecuencia.  2, record 1, Spanish, - desviaci%C3%B3n%20Doppler

Record number: 1, Textual support number: 2 OBS

desviación Doppler : término y definición aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).  3, record 1, Spanish, - desviaci%C3%B3n%20Doppler

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The difference between the phase of the incoming Doppler-shifted GPS carrier and the phase of a nominally constant reference frequency generated in the receiver.  1, record 2, English, - reconstructed%20carrier%20phase

Record number: 2, Textual support number: 1 OBS

For static positioning, the reconstructed carrier phase is sampled at epochs determined by a clock in the receiver. The reconstructed carrier phase changes according to the continuously integrated Doppler shift of the incoming signal, biased by the integral of the frequency offset between the satellite and receiver reference oscillators. The reconstructed carrier phase can be related to the satellite-to-receiver range, once the initial range(or phase ambiguity) has been determined. A change in the satellite-to-receiver range of one wavelength of the GPS carrier(19 cm for L1) will result in a one-cycle change in the phase of the reconstructed carrier.  1, record 2, English, - reconstructed%20carrier%20phase

Record number: 2, Textual support number: 2 OBS

Term and definition provided by the Canadian Hydrographic Service.  1, record 2, English, - reconstructed%20carrier%20phase

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

La différence entre la phase de la porteuse GPS dont la fréquence est décalée par effet Doppler et la phase d'une fréquence de référence nominalement constante produite par le récepteur.  1, record 2, French, - phase%20reconstitu%C3%A9e%20de%20la%20porteuse

Record number: 2, Textual support number: 1 OBS

Aux fins du positionnement statique, la phase reconstituée de la porteuse est échantillonnée suivant des époques déterminées d'après une horloge dans le récepteur. La phase reconstituée de la porteuse varie en fonction du décalage Doppler, intégré de manière ininterrompue, modifié par l'intégrale du décalage de fréquence entre les oscillateurs de référence du récepteur et du satellite. La phase reconstituée de la porteuse peut être mise en relation avec la distance satellite-récepteur une fois la distance initiale (ambiguïté de phase) déterminée. Une modification de la distance satellite-récepteur égale à une longueur d'onde de la porteuse du GPS (19 cm pour L1) résulte en une modification égale à un cycle de la phase reconstituée de la porteuse.  1, record 2, French, - phase%20reconstitu%C3%A9e%20de%20la%20porteuse

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The laser(or lidar) velocimeter [lidar=light radar] operates in a fashion entirely analogous to that of the airborne Doppler weather radars likely soon to be available for detecting turbulence in storm cells. As with radars, the device detects air movements by observing the motion of particles suspended in the air and carried with it. The only significant difference is that a beam of coherent infrared radiation is used to scan ahead of the aircraft, instead of a beam(or series of pulses) of radio energy in the considerably longer-wavelength microwave band. The frequency of the back-scattered echoes or reflections undergoes Doppler shift detection by standard heterodyning techniques, which involve comparing the frequency of the reflected illumination with that of the original laser beam. Any reflecting object or material which has motion relative to the transmitter/receiver will cause a detectable shift in frequency, which can be isolated from the transmitter's own proper motion(over the ground) and thus yield a precise indication of the speed at which the air is moving several hundred metres in front of the aircraft. From this data, it is easy to compute what the air speed of the aircraft will be when it reaches that particular patch of air in a few seconds’ time [and hence detect possible turbulence ahead].  2, record 3, English, - laser%20velocimeter

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Le principe de fonctionnement du vélocimètre à laser (ou lidar) est exactement le même que celui des radars météorologiques Doppler de bord, qui doivent être mis en service prochainement pour la détection des turbulences dans les systèmes d'orages.  1, record 3, French, - v%C3%A9locim%C3%A8tre%20%C3%A0%20laser

Record 3,  Textual support,  Spanish