On Sea Ice Measurement by a C-Band Scatterometer at VV Polarization: Methodology Optimization Based on Computer Simulations

We consider sea ice and water microwave backscatter features at the C-band with vertical transmit and receive polarization and present a method for sea ice/water discrimination using a multiple fixed fan-beam satellite scatterometer. The method is based on the criterion of the minimum statistical di...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2019-11, Vol.11 (21), p.2518
Main Authors: Nekrasov, Alexey, Khachaturian, Alena, Abramov, Evgeny, Markelov, Oleg, Bogachev, Mikhail
Format: Article
Language:English
Subjects:
Algorithms
Anisotropy
Backscattering
C band
fun-beam
Geometry
Mathematical models
Optimization
Polarization
radar backscatter
Remote sensing
Retrieval
Satellites
Sea ice
sea ice/water discrimination
spaceborne scatterometer
Vertical polarization
water surface
Wind
Wind direction
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Summary:We consider sea ice and water microwave backscatter features at the C-band with vertical transmit and receive polarization and present a method for sea ice/water discrimination using a multiple fixed fan-beam satellite scatterometer. The method is based on the criterion of the minimum statistical distance of measured backscatter values to the sea ice and water (CMOD7) geophysical model functions. Implementation of the method is considered both for a typical three fan-beam geometry as well as for a potential five fan-beam geometry of a satellite scatterometer. By using computer simulations, we show explicitly that the number of looks at the same cell from different azimuthal directions needs to be increased to provide better (unambiguous) retrieval of the wind vector and sea ice/water discrimination. The algorithms for sea ice/water discrimination are described, and the results obtained are also discussed along with recommendations for the number of different azimuthal looks (beams) at the same cell from the point of view of sea ice/water discrimination as well as unambiguous wind direction retrieval during the satellite’s single pass.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs11212518