SAR satellite simulated on-orbit load data obtaining system and obtaining method

Abstract

The invention relates to an SAR satellite simulated on-orbit load data obtaining system and obtaining method. According to SAR satellite imaging parameters, SAR echo data is manufactured and is stored in a task planning computer; a navigation signal simulator and an attitude and orbit control ground equipment synchronically output on-orbit simulated flight relevant excitation to an SAR satellite to execute the simulated on-orbit flight; an imaging planning instruction is sent to the SAR satellite; an imaging mode, radar work parameter information, imaging moment, imaging duration, imaging process attitude information and load data downloading moment are transmitted to the SAR satellite. When the preset SAR satellite imaging moment is reached, an echo signal is sent to the SAR satellite; the SAR satellite packs formed load data; when the preset SAR satellite load data downloading moment is reached, load data receiving equipment receives a load data signal sent by the SAR satellite; demodulation receiving and restoration are performed, so that the load data receiving is completed.

Description

technical field [0001] The invention relates to a SAR satellite simulated on-orbit load data acquisition system and an acquisition method, belonging to the technical field of spacecraft comprehensive testing. Background technique [0002] SAR payload data refers to the sum of frame data formed corresponding to each valid PRI during the SAR satellite imaging process. These data include SAR signal data and auxiliary data. According to needs, the SAR payload data may be compressed and formatted before downloading. According to different imaging modes, the data segmentation method, data rate, and data format will be different, but follow the design guidelines. Auxiliary data is the important data of auxiliary SAR imaging that is downloaded simultaneously with the SAR signal data, mainly including the parameters of the SAR payload itself such as the imaging mode word and the status of the payload system, and also other important data of the SAR satellite such as positioning and...

AI Technical Summary

Problems solved by technology

The paper "A Fast Simulation Method for Interferometric SAR Complex Image Data" is a method for deriving SAR data based on software simulation method. The accuracy of the result is restricted by the software model, which is unrealistic and cannot be used to verify the ground station imaging system.

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