NDLI: Backscatter from the ocean surface under low wind conditions

Content Provider	IEEE Xplore Digital Library
Author	Carswell, J. McIntosh, R.
Copyright Year	1994
Description	Author affiliation: Microwave Remote Sensing Lab., Massachusetts Univ., Amherst, MA, USA (Carswell, J.; McIntosh, R.)
Abstract	The University of Massachusetts C-band scatterometer (C-SCAT) participated in the Tropical Ocean Global Atmosphere Coupled Ocean Atmosphere Response Experiment (TOGA COARE). Twenty-one missions were flown over the warm pool region of the South Pacific from November, 1992 to February, 1993. During ten of these missions the surface winds were under 4 m s/sup -1/. Preliminary results from data collected at 20/spl deg/, 30/spl deg/, 40/spl deg/, and 50/spl deg/ incidence by C-SCAT show significant spatial variability in the normalized radar cross section (NRCS). Strong azimuthal modulations on the order of 20 dB are observed in these measurements. The minima of these modulations fluctuate substantially in the position end magnitude over areas less than 1 km/sup 2/. As spatial averaging is performed (size of the footprint is increased), smoothing of the azimuthal modulation occurs. The effects of this spatial averaging on the measurements of the NRCS under low-wind conditions is investigated. The validity of estimating the surface wind vector with a spaceborne scatterometer, whose foot print is typically greater than 50 km/spl times/50 km, is discussed.
Starting Page	562
Ending Page	564
File Size	342435
Page Count	3
File Format	PDF
ISBN	0780314972
DOI	10.1109/IGARSS.1994.399184
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-08-08
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Backscatter Oceans Sea surface Spaceborne radar Radar measurements Atmosphere Sea measurements Radar cross section Smoothing methods Foot
Content Type	Text
Resource Type	Article

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