Precipitation micro radar
The Micro Rain Radar GEO-MRR-2 measures profiles of Doppler spectra and derives drop size distributions, rain rates, liquid water contents, radar reflectivity factors, Doppler velocities, path integrated attenuation. Due to the easy set up and the insensitivity to surrounding structures as mast, buildings or trees the GEO-MRR-2 represents a ideal, practically maintenance-free measuring platform in all kinds of hydrometeorological installations - even at remote sites. The raw data of the GEO-MRR-2 radar front end are transmitted via RS422 serial line or Ethernet port to a standard pc device over a distance up to 100 m for further data calculation, data storage and remote access. Alternatively single board pc units with low power consumption can be used. An automatically controlled antenna heating allows also for operation under winterly conditions or at sites with snow and icing events. Typical applications include the unattended long term measurement of rain, real time calibration of weather radar and monitoring of melting zone.

The newly developed hardware of the GEO-MRR-PRO combines the unique Micro Rain Radar technique of the GEO-MRR-2 and a high performance processing unit which significantly improves all operating parameters. The system allows precise measurements of the Doppler spectra caused by hydrometeors and yields the rain rate, liquid water content and drop size distribution for the liquid phase. All computations including automatic melting zone detection are integrated in the outdoor electronics. The system has been evolved to be a powerful stand-alone profiler for investigations of precipitation and cloud dynamics with very low installation and logistics effort.
The GEO-MRR-PRO can be easily installed virtually independent of site conditions. An optional heating for the offset antenna is available in order to avoid coverage by ice or snow. Adjustment of the system parameters by user via remote access link is possible. The system requires only very low maintenance and has been used for routine measurements even at adverse sites.
The software of GEO-MRR-PRO offers a convenient web-interface for system monitoring, data retrieval and file management. For integration to wide monitoring networks various data protocols e.g. NETCDF are implemented.