HYDRIXTM is a Compact X-BAND radar and Data Processing System built for operational puposes. It is dedicated to the local surveillance of meteorological phenomena.

HYDRIXTM uses Polarimetric and Doppler measurement technique to :

HYDRIXTM uses a new revolutionary concept, patented by CNRS, which is based on the ZPHI® algorithm. This algoritm has been developed and tested over many years on airborne and spaceborne research radars.
HYDRIXTM realizes an advanced technology that makes profit of the latest scientific achievements in Radar Meteorology

HYDRIXTM is a product of

HyMeT euroconsort
Represented in Germany by
GAMIC mbH, 52072 Aachen, Roermonder Str. 151
Tel +49 (0)241 889110, Fax xx49 (0) 241 889119, mail : info@gamic.com

X-band Hydro-Météorological doppler Radar with polarization diversity

The implementation of polarisation diversity in conjunction with the ZPHI® algorithmprovides a rain measurement without attenuation along the measurement range. It takes into account the variabiity of the drop size distribution of the measured rain.


  • Replacement of raingage networks
  • Subcatchment hydrology
  • Management of water reservoirs
  • Fooding forcast.
  • Protection of urban area
  • Mangement of sewage systems
  • Meteorological surveillance 
    • of costal zones and ports
    • of airports
  • Battlefield and supply transportation meteorology
  • Snow and avalanche forecast: estimate of the snow layer thickness
  • Local agriculture: hydrological balance
  • Amusement parcs
  • TV and local radio stations
  • Tourism: ski resorts, beaches, holiday clubs




  • diameter: 1,2 meter
  • beamwidth: 2° à 3 dB (each sense).
  • two polarisations H and V.
  • secondary sidelobes< -26 dB. 
  • azimut rotation speed: 20°/s. 
  • vol scan update time < 120s (5 elevations). 


  • Peak power 50 kW.
  • Pulse Length 1 and 2 ms.
  • Simultaneous transmission of the two polarisations.
  • Control System and data acquisition
  • simultaneous data acquisition 14 bits H and V.
  • "dual PRT" programmable (mode Doppler). 

Measured parameters 

  • radar reflectivity Z. 
  • differential phase Fdp. 
  • coherence coefficient rHV. 
  • differential reflectivity ZDR. 
  • radial velocity V, turbulence W 

Calculated parameters and Precision 

  • Precipitation rate: <15%. 
  • Accumulated rainfall: <5%. 
  • Hydrometeor Classes 
  • Shear and freezing rain zones
Comparison of the mean rainfall rate on a water shed of 150 km2 obtained (i) from a raingauge network (blak continuous line) and (ii) from a polarimetric radar ( red circles: estimate from ZPHI; blue lozenges: classical estimate R=aZb). [from E. LeBouar, J.
Testud, and T. Keenan, 2000]

Top diagram: vertical cross section of a severe storm in Oklahoma (USA) as observed by a polarimetric radar. Bottom diagram: classification of the various types of hydrometeors using Zrnic's algorithm. (LR, MR, HR :Light, medium or heavy rain; LD : large drops; R/H : hail-rain mixture; GSH : graupel, small hail; HA : grêle ; DS, WS : dry or wet snow; IH, IV : horizontal or vertical ice crystals) [Courtesy of D. Zrnic, NSSL-USA]