TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

An update on the latest research in the areas of the pressure jump line, objective tornado forecast methods, storm detection by radar, and sferics was presented in a session on applied forecasting research. It was made obvious to the SWU [Severe Forecasting Unit] forecasters that over and above their forecast duties, the development of new and improved methods for forecasting severe storms was expected from them.  2, fiche 1, Anglais, - radar%20storm%20detection

Fiche 1,  Justifications,  Français

Fiche 1,  Justifications,  Espagnol

Record number: 1, Textual support number: 1 DEF

Detección de ciertas tormentas o estados de mal tiempo por medio del radar.  1, fiche 1, Espagnol, - detecci%C3%B3n%20de%20tormentas%20por%20medio%20del%20radar

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

Detection and analysis, by means of radar, of meteorological phenomena which produce a radar echo (precipitation, snow, storms, etc.).  3, fiche 2, Anglais, - radar%20detection

Record number: 2, Textual support number: 1 CONT

Radar detection of precipitation is increasingly used for weather reporting and forecasting. In the USA, a network of dedicated radars is used for this purpose.  1, fiche 2, Anglais, - radar%20detection

Record number: 2, Textual support number: 1 PHR

radar detection of clouds, low-altitude weather phenomena, macrobursts, microbursts, precipitation, severe storms, smaller-scale, snow, storm, tornado vortices, weather.  3, fiche 2, Anglais, - radar%20detection

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Détection et analyse, au moyen d'un radar, des phénomènes météorologiques fournissant un écho radioélectrique (régions de précipitations du type averse).  3, fiche 2, Français, - d%C3%A9tection%20par%20radar

Record number: 2, Textual support number: 1 CONT

[Les] cinq articles [...] reposent sur l'observation radar du champ de précipitation. Les deux premières contributions touchent à la détection par radar d'événements précipitants fortement atténuants pour une liaison radioélectrique, pour lesquels il n'existe à ce jour aucun critère d'identification : les orages supercellulaires et les orages grêlifères.  1, fiche 2, Français, - d%C3%A9tection%20par%20radar

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

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, fiche 3, Anglais, - laser%20velocimeter

Fiche 3,  Justifications,  Français

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, fiche 3, Français, - v%C3%A9locim%C3%A8tre%20%C3%A0%20laser

Fiche 3,  Justifications,  Espagnol