https://atmos.meteo.uni-koeln.de/ag_crewell/ 2026-05-22T01:34:08+00:00 https://atmos.meteo.uni-koeln.de/ag_crewell/ https://atmos.meteo.uni-koeln.de/ag_crewell/lib/exe/fetch.php?media=wiki:logo.png text/html 2026-04-21T15:40:32+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:mrrnya:mrrnya&rev=1776786032&do=diff Micro Rain Radar (MRR) at Ny-Ålesund Mentor: Andreas Walbröl Principle The Micro Rain Radar (MRR) is a vertically pointing FM-CW (frequency modulated continuous wave) Doppler radar operating at K-band (24.1 GHz, 12.4 mm wavelength). The emitted radar signal (only 50mW transmitting power) is backscattered by falling hydrometeors (rain, graupel, snow). From the Doppler spectra the radar reflectivity factor (Ze) and the terminal fall velocity distribution can be derived. The range resolution can…