The In-orbit Test Method for Distributed InSAR Satellite Azimuth Space Synchronization

The distributed satellite InSAR (interferometric synthetic aperture radar) system is currently an important and excellent remote sensing method for obtaining high-precision Digital Surface Model (DSM). In order to achieve InSAR interferometry, it is necessary to ensure the space synchronization of the binary satellite SAR beams, so as to provide the auxiliary satellite to receive enough echo energy and maintain good coherence with the Master satellite. This paper proposes an In-orbit test method for the azimuth space synchronization index of the maximum coherence method, which can effectively obtain the azimuth space synchronization test results, improve the validity and reliability of the test, and provide strong support for the InSAR system to obtain high-precision DSM products.