Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 450921
Title Rainfall estimation using spectral analysis of microwave link signals
Author(s) Leijnse, H.; Uijlenhoet, R.
Event EGU General Assembly 2013, Vienna, 2013-04-07/2013-04-12
Department(s) Hydrology and Quantitative Water Management
WIMEK
Publication type Abstract in scientific journal or proceedings
Publication year 2013
Abstract It is well-known that microwave-link signal attenuation can be used to estimate path-average rainfall intensities. Such rainfall data is a valuable addition to radar and rain gauge data because these measurements are close to the ground, the retrieval relation is close to linear, and the measurement paths are of the order of several kilometers. However, there are several sources of error that affect these rainfall estimates. The most important of these are 1) signal attenuation due to wet antennas, 2) correct estimation of signal baseline, and 3) correct definition of wet and dry periods. We propose a novel method for microwave-link rainfall estimation based on spectral analysis of the microwave link signals. This method is based on the fact that individual raindrops falling through the beam of the microwave link cause the received signal to fluctuate. These signal fluctuations have a different frequency spectrum than those caused by turbulent fluxes. The major advantage of this method is that it does not suffer from the sources of error mentioned above. The method is tested on a dataset collected at the Chilbolton Facility for Atmospheric and Radio Research with a 500-m microwave link and several rain gauges.
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