Interpretation of Polarization Features in Ground-Based Microwave Observations as Caused by Horizontally Aligned Oblate Raindrops
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|
|HGF - Program:||Space|
|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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