NDLI: Improved slope estimation for SAR Doppler ambiguity resolution

Content Provider	IEEE Xplore Digital Library
Author	Cumming, I.G. Shu Li
Copyright Year	1980
Abstract	The idea of using the Radon transform to measure the alignment of linear features in synthetic aperture radar (SAR) data has breathed new life into the "look displacement" class of Doppler ambiguity resolution algorithms. In these algorithms, the slope of target energy is estimated to obtain the satellite beam pointing angle accurately enough to resolve the Doppler ambiguity. After explaining the method and adding some minor improvements, it is shown how it can work well on satellite SAR data. Then, an alternate method is developed that combines the ideas of the Radon and look displacement algorithms to obtain a computationally simpler and more accurate algorithm. In addition, the quality checks of the "spatial diversity" approach are used to increase the robustness of the algorithm. Even though the algorithm was conceived for high-contrast scenes, it works remarkably well in low to medium contrast scenes as well.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	707
Ending Page	718
Page Count	12
File Size	1508054
File Format	PDF
ISSN	01962892
Volume Number	44
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation Satellites Layout Synthetic aperture radar Azimuth Geometry Displacement measurement Energy resolution Robustness Baseband synthetic aperture radar (SAR) antenna pointing angle Doppler ambiguity resolution Doppler centroid estimation Radon transform
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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