doi:

DOI: 10.3724/SP.J.1300.2012.20044

Journal of Radars (雷达学报) 2012/1:3 PP.314-322

Three-dimensional Resolution Analysis for Geosynchronous Circular SAR


Abstract:
GEOsynchronous Circular SAR (GEOCSAR), having a high orbit, operating in a slant ellipse, and imaging in spherical surface, should be newly modeled to assess the resolution performance. In this paper, starting from modeling geometry, a function of slant range difference and orientation angle is deduced. Then we can obtain the three dimensional point spread function and make a conclusion of resolution affected by both sinc function and bessel function of first kind. Lastly, resolution with the variation of location of target, bandwidth, radius of orbit, and integral time is analyzed detailedly. Finally raw signal simulations show the validity of theoretical model.

Key words:Synthetic Aperture Radar (SAR),Circular SAR,Resolution,Geosynchronous orbit

ReleaseDate:2014-07-21 16:24:06



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