DocumentCode :
1393754
Title :
Effect of Faraday rotation on polarimetric SAR
Author :
Gail, W.B.
Author_Institution :
Ball Aerospace & Technol. Corp., Boulder, CO
Volume :
34
Issue :
1
fYear :
1998
fDate :
1/1/1998 12:00:00 AM
Firstpage :
301
Lastpage :
307
Abstract :
The effect of ionospheric Faraday rotation on polarimetric synthetic aperture radar (SAR) imagery is evaluated theoretically. Faraday rotation is readily included in the polarimetric SAR system equation describing the received signal if the rotation angle is assumed constant over the synthetic aperture length. Deviations from a constant rotation angle over this length impact the validity of the derived system equation, but an explicit evaluation shows such effects to be negligible for most expected ionospheric conditions. The modified system equation provides a basis for calibration techniques that can be used to either remove or measure Faraday rotation effects in SAR imagery
Keywords :
Faraday effect; calibration; ionospheric electromagnetic wave propagation; magneto-optical effects; optical dispersion; radar cross-sections; radar imaging; radar polarimetry; spaceborne radar; synthetic aperture radar; Faraday rotation; SAR imagery; SAR system equation; calibration techniques; constant rotation angle; explicit evaluation; polarimetric SAR; polarimetric synthetic aperture radar imagery; synthetic aperture length; system equation; Backscatter; Calibration; Distortion measurement; Equations; Frequency; Position measurement; Radar scattering; Rotation measurement; Spaceborne radar; Synthetic aperture radar;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9251
Type :
jour
DOI :
10.1109/7.640287
Filename :
640287
Link To Document :
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