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| Titel |
Precipitation observation using microwave backhaul links in the alpine and pre-alpine region of Southern Germany |
| VerfasserIn |
C. Chwala, A. Gmeiner, W. Qiu, S. Hipp, D. Nienaber, U. Siart, T. Eibert, M. Pohl, J. Seltmann, J. Fritz, H. Kunstmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 8 ; Nr. 16, no. 8 (2012-08-13), S.2647-2661 |
| Datensatznummer |
250013418
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| Publikation (Nr.) |
 copernicus.org/hess-16-2647-2012.pdf |
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| Zusammenfassung |
| Measuring rain rates over complex terrain is afflicted with
large uncertainties, because rain gauges are influenced by
orography and weather radars are mostly not able to look into
mountain valleys. We apply a new method to estimate near
surface rain rates exploiting attenuation data from commercial
microwave links in the alpine region of Southern
Germany. Received signal level (RSL) data are recorded minutely
with small data loggers at the towers and then sent to
a database server via GSM (Global System for Mobile Communications). Due to the large RSL fluctuations
in periods without rain, the determination of attenuation
caused by precipitation is not straightforward. To be able to
continuously process the RSL data from July 2010 to October 2010,
we introduce a new method to detect wet and dry periods
using spectral time series analysis.
Its performance and limitations are presented, showing that the mean detection error rates of wet and dry periods can be reduced to 10% for all five links.
After, the wet/dry classification rain rates are derived from the RSL and compared to rain gauge and weather radar measurements.
The resulting correlations differ for different
links and reach values of R2 = 0.81 for the link-gauge
comparison and R2 = 0.85 for the link-radar comparison. |
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