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Because many factors affect the azimuth resolution of bistatic SAR, it is a complex problem to design a proper bistatic configuration to achieve good resolution. This poster analyzes each key parameter that affects the azimuth resolution by keeping the others constant in the spatial invariant case. Then, simulation results are presented to validate the theoretical analysis. Finally, a method for bistatic...
This paper deals with the azimuth resolution improvement problems via the coherent combination of the SAR images with nearly zero-overlapped Doppler bandwidth, which corresponding to large along-track baseline. Prior to the combination of the images, the phase bias contributions from the atmospheric propagation delays and baseline measurement errors should be calibrated. The interferogram of the azimuth...
Spotlight mode offers finer azimuth resolution than that achievable in stripmap mode using the same physical antenna. The most popular spotlight synthetic aperture radar (SAR) reconstruction method is the classic polar format algorithm (PFA). However, PFA needs to perform range and azimuth interpolation operations during SAR imaging, which, in turn, affect the imaging precision and the computation...
Recently bistatic synthetic aperture radar (SAR), especially spaceborne SARs, has attracted the attention of many radar researchers. Generally, the orbit of satellite for remote sensing purposes is an ellipse with small eccentricity, and the earth should be modeled as an ellipsoid. It is well known that a second-order relative motion model can be a good approximation to a monostotic spaceborne SAR...
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