DocumentCode :
1440636
Title :
Assessment of the Performance of a Dual-Frequency Surface Reference Technique Over Ocean
Author :
Meneghini, Robert ; Liao, Liang ; Tanelli, Simone ; Durden, Stephen L.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Volume :
50
Issue :
8
fYear :
2012
Firstpage :
2968
Lastpage :
2977
Abstract :
The high correlation of the rain-free surface cross sections at two frequencies suggests that the estimate of differential path-integrated attenuation caused by precipitation along the radar beam can be obtained to a higher degree of accuracy than the path attenuation at either frequency. We explore this potential first analytically and then by examining data from the JPL dual-frequency airborne radar using measurements from the Tropical Composition, Cloud, and Climate Coupling experiment obtained during July-August 2007. Despite an improvement in the accuracy of the differential path attenuation, solving for parameters of the particle size distribution often requires not only this quantity but the single-wavelength path attenuation as well. We investigate a simple method of estimating the single-frequency path attenuation from the differential attenuation and compare this estimate with that derived directly from the surface return.
Keywords :
atmospheric precipitation; oceanographic techniques; remote sensing by radar; AD 2007 07 to 08; JPL dual-frequency airborne radar; cloud-climate coupling experiment; differential path attenuation; dual-frequency surface reference technique; higher accuracy degree; ocean; path-integrated attenuation; radar beam; rain-free surface cross sections; single-wavelength path attenuation; tropical composition experiment; Attenuation; Rain; Sea measurements; Sea surface; Spaceborne radar; Attenuation; precipitation; radar; surface scattering;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/TGRS.2011.2180727
Filename :
6145749
Link To Document :
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