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Investigation of radar discrimination of sea iceThe ability of radar to discriminate sea ice types and their thickness was studied. Radar backscatter measurements at 400 MHz (multi-polarization) and 13.3 GHz (VV polarization) obtained from NASA Earth Resources Aircraft Program Mission 126 were analyzed in detail. The scatterometer data were separated into seven categories of sea ice according to age and thickness as interpreted from stereo aerial photographs. The variations of radar backscatter cross-section with sea ice thickness at various angles are presented at the two frequencies. There is a reversal of angular character of radar return from sea ice less than 18 cm thick at the two frequencies. Multi-year ice (sea ice greater than 180 cm thick) gives strongest return at 13.3 GHz. First-year ice (30 cm to 90 cm thick) gives strongest return at 400 MHz. Open water can be differentiated at both the frequencies. Four-polarization 16.5 GHz radar imagery was also obtained. Open water and three categories of sea ice can be identified on the images. The results of the imagery analysis are consistent with the radar scatterometer results.
Document ID
19750033049
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Parashar, S. K.
Biggs, A. W.
Fung, A. K.
Moore, R. K.
(University of Kansas Center for Research, Inc., Lawrence Kan., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Subject Category
Oceanography
Meeting Information
Meeting: International Symposium on Remote Sensing of Environment
Location: Ann Arbor, MI
Start Date: April 15, 1974
End Date: April 19, 1974
Accession Number
75A17121
Funding Number(s)
CONTRACT_GRANT: NAS9-10261
CONTRACT_GRANT: N60921-70-C-0221
Distribution Limits
Public
Copyright
Other

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