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--- mrrnya [2026/05/23 08:24] – kerstin
+++ mrrnya [2026/05/23 08:35] (current) – kerstin
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 ====== Micro Rain Radar (MRR) at Ny-Ålesund======
-//Mentor: [[a.walbroel@uni-koeln.de|Andreas Walbröl]]//
+//Mentor: [[a.walbroel@uni-koeln.de|Andreas Walbröl]], Data: [[kerstin.ebell@uni-koeln.de|Kerstin Ebell]]//
 {{:wiki:nya:mrr_nya.jpg?400|}}
-[[http://www.metek.de/|METEK]] MRR (24.1 GHz radar) at [[http://www.awipev.eu/|AWIPEV Ny-Ålesund]], Svalbard, on the roof of the atmospheric observatory.
+[[http://www.metek.de/|METEK]] Micro Rain Radar at [[http://www.awipev.eu/|AWIPEV Ny-Ålesund]], Svalbard, on the roof of the atmospheric observatory.
 ===== Principle =====
-The **M**icro **R**ain **R**adar (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 be varied from 10 to 200m which determines together with the 30 range gates the system's maximum height range of 300-6000 m. In case of rain the Doppler spectra can be used to derive vertical profiles of microphysical rain properties like drop size distribution and rain rate. Recently, the MRR system was also studied for its potential to observe snowfall ([[http://www.springerlink.com/content/b2100mqrr7033570/fulltext.pdf|Kneifel et al. 2011]]). Also an improved MRR algorithm most suitable for snowfall observations has been developed at IGMK [[http://www.atmos-meas-tech-discuss.net/5/4771/2012/|link]] and is also freely available here: [[software:improtoo|IMProToo - Improved Mrr Processing Tool]].
+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 50 mW 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 be varied from 10 to 200 m, and together with the 30 range gates, this determines the maximum height range of 300-6000 m. In the case of rain, Doppler spectra can be used to derive vertical profiles of microphysical rain properties, such as drop-size distribution and rain rate. Recently, the MRR system was also studied for its potential to observe snowfall ([[http://www.springerlink.com/content/b2100mqrr7033570/fulltext.pdf|Kneifel et al. 2011]]). An improved MRR algorithm ([[https://github.com/maahn/IMProToo|IMProToo - Improved MRR Processing Tool]]) for snowfall observations has been developed at IGMK by [[https://amt.copernicus.org/articles/5/2661/2012/|Maahn et al. (2012)]] and is applied to the measurements.
 ===== History =====
@@ Line 18: / Line 18: @@
   * If you are interested in receiving data please contact [[kebell@meteo.uni-koeln.de|Kerstin Ebell]]
-  * [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser1.html?site=Ny-Alesund&date=0&UpperLeft=MRR_IMProToo | Quicklook archive]]
+  * [[https://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser1.html?site=Ny-Alesund&date=0&UpperLeft=MRR-IMProToo | Quicklooks]]
 ===== Specifications =====
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 | Antenna diameter | 0.5 m | |
 | Beam width (2-way, 6 dB) | 1.5° | |
+===== Literature =====
+**Maahn, M.** and Kollias, P., 2012: Improved Micro Rain Radar snow measurements using Doppler spectra post-processing, //Atmos. Meas. Tech.//, 5, 2661-2673, [[http://dx.doi.org/10.5194/amt-5-2661-2012|doi:10.5194/amt-5-2661-2012]].