Abstract
Inclined geosynchronous Earth orbit synthetic aperture radar (GEO SAR) is seriously affected by Earth rotation because of its identical angular velocity with the Earth rotation. Therefore, the composition motion of GEO SAR and the illuminated target is extremely complicated because of the inclined orbit geometry. Hence the analysis methods of stripmap mode are no longer suitable for GEO SAR. The classical SAR minimum antenna area criterion fails either. This paper analyses the calculation of the antenna area constraint in GEO SAR based on all the possible existing cases in one running orbit. Finally, a simulation is given out based on a set of typical GEO SAR parameters. (4 pages)
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