By analyzing the motion characteristic of Geosynchronous Earth Orbit (GEO) satellite, the influence of GEO satellite on Doppler resolution is expounded. Without considering the acceleration of the platform, the expression of Doppler resolution of traditional bistatic Synthetic Aperture Radar (SAR) cannot be applied directly to geosynchronous-missile bistatic SAR. Firstly, based on the influence of curve trajectories of transmitter and receiver on Doppler characteristic of echo signal, the expression of Doppler resolution for geosynchronous-missile bistatic SAR is deduced with the gradient method. Then the impacts of geometrical configuration and Doppler parameters (especially the acceleration) on the Doppler resolution calculation are discussed in detail. Finally, the simulation results validate the proposed method for calculating Doppler resolution of geosynchronous-missile bistatic SAR. And this could increase the integrality of bistatic SAR theory system and provide theoretical support for the system design and application of bistatic SAR.
LIN Chunhui
,
GUO Ping
,
ZHANG Linrang
,
TANG Shiyang
,
CHEN Zhanye
. Doppler resolution characteristic analysis for GEO missile BiSAR[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019
, 40(5)
: 322420
-322420
.
DOI: 10.7527/S1000-6893.2018.22420
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