Simultaneous measurements of ku- and ka-band sea surface cross sections by an airborne Radar

The dual-frequency Airborne Precipitation Radar-2 (APR-2) was deployed during the Wakasa Bay Experiment in 2003, for validation of the Advanced Microwave Scanning Radiometer-EOS. Besides providing extensive observations of diverse precipitating systems, this Ku-(13.4 GHz) and Ka-band (35.6 GHz) cros...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2006-07, Vol.3 (3), p.359-363
Main Authors: Tanelli, S., Durden, S.L., Im, E.
Format: Article
Language:English
Subjects:
Airborne radar
Backscattering
Calibration
Cross sections
Incidence angle
Marine
Microwaves
Oceans
Precipitation
Radar
Radar cross section
Radar measurements
Rough surfaces
Scanning
Sea measurements
Sea surface
Spaceborne radar
Surface roughness
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Summary:The dual-frequency Airborne Precipitation Radar-2 (APR-2) was deployed during the Wakasa Bay Experiment in 2003, for validation of the Advanced Microwave Scanning Radiometer-EOS. Besides providing extensive observations of diverse precipitating systems, this Ku-(13.4 GHz) and Ka-band (35.6 GHz) cross-track scanning radar measured sea surface backscatter simultaneously. While the characteristics of the normalized sea surface cross section sigma 0 at Ku-band are well understood and widely published, the existing experimental data concerning sigma 0 at Ka-band are scarce and results are inconsistent. In this letter, the Ku/Ka-band sigma 0 measurements collected by APR-2, together with the estimated uncertainties, are discussed. In general, the measured sigma 0 at Ka-band at around 10deg incidence angle appears to be close to that at Ku-band sigma 0 , and Ka-band exhibits a nonnegligible difference in wind dependence with respect to Ku-band for moderate to high winds
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2006.872929