The Government of Canada’s terminology and linguistic data bank.


Record 1 2003-02-24


Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment

An electronic theodolite which determines the direction of a radio transmitter carried by a free balloon in the atmosphere.


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.

Key term(s)
  • radio-theodolite


  • Stations, instruments et équipements météorologiques

Théodolite électronique qui détermine la direction d'un émetteur radioélectrique emporté par un ballon libre dans l'atmosphère.


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.

Key term(s)
  • radio-théodolite
  • radio théodolite


Campo(s) temático(s)
  • Estaciones, instrumentos y equipos meteorológicos

Teodolito electrónico para determinar la posición en el espacio de un transmisor de radio transportado por un globo libre.

Save record 1

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau


Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: