Pour ceux qui préfèrent une présentation en français, cliquer ici SVP.
I - Introduction
The INSU/Météo ST radar network is a French network of wind profiler radars (called Stratosphere-Troposphere radar), which are clear air Doppler radars, continuously measuring the three components of the wind above the radar, even in cloud free conditions. The network is made of 5 VHF and 1 UHF clear air Doppler radars operating at 45 (or 72) and 961 MHz, respectively.
(see the explanations of these radars' principles(1.2 Mb PDF file in French!))
This network has been set up by a common support of the Institut National des Sciences de l'Univers (INSU) which is an institute of the French Centre National de la Recherche Scientifique (CNRS), and of Météo-France, the French weather service.
These radars are operated by the following institutes :
(click on the title in order to obtain the location and the technical specifications of the radars)
III - Data from the Clermont-Ferrand radar
IV - Scientific program
Our main interests are on the dynamical aspects of troposphere-stratosphere exchanges within mid-latitude cut-off lows or tropopause folds, on the development and test of the Radio-Acoustic Sounding System (RASS) and on the development of data recording and treatment systems.
For these experimental studies, we use :
One such experiment is the ESTIME ( Échanges Stratosphère-Troposphère et Investigations à Méso Échelle in French, or Stratosphere-Troposphere Exchanges and MEso-scale Investigations in English) described in the presentation made at the Third International Symposium onTropospheric Profiling: Needs and Technologies, Hamburg, Germany, Aug. 30- Sept. 2, 1994.
We have developed a Radio-Acoustic Sounding System (RASS) based on a frequency shift for the received signal. A short description of this system and some experimental results are shown in the poster presentation made at the Third International Symposium on Tropospheric Profiling: Needs and Technologies, Hamburg, Germany, Aug. 30-Sept. 2, 1994.
The INSU/Météo ST radar network is involved in the Mesoscale Alpine Programme (MAP) which is an international research initiative devoted to the study of atmospheric and hydrological processes over mountainous terrain and for which a large-scale field phase in the Alpine region is planned for autumn 1999.
Four persons are involved in the radar development and operation and in the data recording, treatment and scientific interpretation. A technical team of 6 persons may be devoted to technical tests and improvements.
(click on the title in order to obtain a list of our most recent references)
VII - WWW-links
There are several other wind profiler radars in Europe, some of which are accessible on the WEB :