Publication:
Theory of two-dimensional signature morphology for arbitrarily moving surface targets in squinted spotlight synthetic aperture radar

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Authors
Garren, David Alan
Subjects
Moving targets
Radar signatures
Radar squint
Range migration
Synthetic aperture radar (SAR)
Target migrationi
Advisors
Date of Issue
2015
Date
Publisher
IEEE
Language
Abstract
This paper develops analytic equations for predicting the smear signature morphology due to surface targets having arbitrary motion within squinted spotlight synthetic aperture radar (SAR) imagery. A power-series expansion of the subaperture phase history data is applied to compute a generic expression for the down-range and cross-range components of the predicted central 2-D contour of mover signatures, including the cross-range offset. In addition, the current analysis generates an analytic approximation for the 2-D impulse response (IPR) of surface moving target signatures within subaperture images. This investigation reveals that the summation of a large number of nonoverlapping IPRs yields an excellent reproduction of the target signature, including smear width and self-interference effects, as compared with standard image formation using simulated radar data. Thus, the analytics derived herein can provide an effective methodology for understanding the shape, extent, location, width, and interference effects of smears due to arbitrarily moving surface targets for squinted spotlight SAR.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1109/TGRS.2015.2416066
Series/Report No
Department
Electrical and Computer Engineering
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
12 p.
Citation
Garren, D.A., "Theory of two dimensional signature morphology for arbitrarily moving surface targets in squinted spotlight synthetic aperture radar," IEEE Transactions on geoscience and remote sensing, v.53, no.9, September 2015, pp. 4997-5008.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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