Polarization Doppler Radar (POLDIRAD)

Radarantenna on top of the Institute Building

Measured values

  • Precipitation
  • Wind
  • Scattering-Matrix

Description of facility

The Polarization Doppler Radar (POLDIRAD) is a C-Band weather radar. It is capable to create various polarizations to distinguish between different kinds of hydrometeors, like rain, snow, graupel or hail. Furthermore, a quantitative rain rate estimation is feasable.

The wind speed can be derived from the Doppler measurements. Using the bistatic extension, the three dimensional wind field can be derived (e.g. from thunderstorms).

Its main feature is the polarization network, which allows to change transmit and receive polarization (e.g. horizontal, vertical, linear 45° ot ciruclar) for each radar pulse.

Application

The variable polarized radar beam is used to derive the type and quantify hydrometeors (rain, snow, graupel, hail). This is done by utilizing the different shapes of the hydrometeors and their different scattering parameters for various polarized electromagnetic waves. By using polarmetric radars, the rain rate can be estimated more precisely than with non-polarimetric ones. The POLDIRAD radar was used in the past for various projects and experiments, especially in thunderstorm research.

Literature / References

  • Friedrich, K., Hagen, M.: Wind Vector Field Determination with Bistatic Multiple-Doppler Radar Network. 30th International Conference on Radar Meteorology, Munich, 19-24 July 2001, 30th International Conference on Radar Meteorology, Munich, S. 133-135, (2001)
  • Hagen, M.: On the Variation of the Parametrization of Rainfall Rate Estimation by Dual Polarization Techniques. 30th International Conference on Radar Meteorology, Munich, 19-24 July 2001, 30th International Conference on Radar Meteorology, Munich, S. 644-645, (2001)

Institute / Organization

DLR Institute of Atmospheric Physics

Contact

Dr.rer.nat. Helmut Ziereis
DLR Institute of Atmospheric Physics

Robert Klarner
Technology Marketing

Similar Measures

Subsequent references to data sheets are given which describe with high probability similar measured values. The selection is made on the basis of semantic affinity:

Precipitation :: more

Wind :: more

Scattering-Matrix :: more