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Chirp scaling algorithm for GEO SAR based on fourth-order range equation

1 1 1 1 1 Rating 4.80 (25 Votes)

ABSTRACT:

For a synthetic aperture radar (SAR) onboard a geosynchronous-earth-orbit (GEO) satellite, the track can be curvilinear. Thus, the validity of imaging algorithms based on the conventional hyperbolic range equation (CHRE) becomes questionable. A fourth-order range equation is adopted to improve the accuracy in the approximation of the range history for GEO SAR and a modified chirp scaling algorithm (CSA) is proposed. Simulation results show that the presented algorithm has better performance than the CHRE-based CSA in the GEO case, implying good application prospects.


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Chirp scaling algorithm for GEO SAR based on fourth-order range equation - 4.8 out of 5 based on 25 votes

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