Czekala, H. and Crewell, S. and Simmer, C. and Thiele, A. and Hornbostel, A. and Schroth, A. (2001) Interpretation of Polarization Features in Ground-Based Microwave Observations as Caused by Horizontally Aligned Oblate Raindrops. Journal of Applied Meteorology, 40 (11), pp. 1918-1932.
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Based on comparision of ground-based radiometer measurements with microwave radiative transfer calculations it is shown that raindropswith oblate shape and preferred horizontal orientation have a significant effect on microwave polarization signals when compared with spherical perticle shape. Measurements with dual-polarized 19-GHz radiometer reveal a polarization difference of as much as -18K in the downwelling microwave radiation at 30 degree elevation angle. Averaging of all rain observations within 19 months leads to a polarization difference of -6K. The averaged model results for oblate raindrops lead to a polarization difference of -8K, which is in reasonable agreement with long-term averaged observations.
|Title:||Interpretation of Polarization Features in Ground-Based Microwave Observations as Caused by Horizontally Aligned Oblate Raindrops|
|Journal or Publication Title:||Journal of Applied Meteorology|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1918-1932|
|Keywords:||Radiometrie, Polarisation, Regen, Strahlungstransfer|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W KN - Kommunikation/Navigation|
|DLR - Research area:||Space|
|DLR - Program:||W KN - Kommunikation/Navigation|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Communication and Navigation|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 21:01|
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