Data simulation for near-space formation flying SAR

The lack of real synthetic aperture radar(SAR)data greatly limits the research of near space formation flying SAR. This paper therefore investigates the SAR data simulation. The air-ground geometry for near space formation flying SAR under large antenna look angle is presented. In order to depict this geometry completely, framework of nine coordinates is proposed with their definition respectively. Errors of echo in the air-ground link are analyzed according to mathematical model of near space format SAR signal. A simulation method which can reflect the physical process of near space formation flying SAR operation completely is proposed. The simulation experiments validates the effectiveness of this approach.