A brief analysis of the positioning accuracy for the TH-2 satellite system

doi:10.11947/j.AGCS.2022.20210397

Abstract

Abstract: The TH-2 satellite system is China's first microwave surveying satellite system based on distributed interferometric technology. In this paper, the positioning accuracy of the satellite system is studied. According to the InSAR mechanism model, the error sources that affect the positioning accuracy are analyzed, and the InSAR data processing flow is designed. The satellite positioning accuracies in plain and mountain area are tested and verified by using the baseline measurement accuracy and ground processing accuracy of ground design and on-orbit test. The tests show that the plane and elevation accuracy of the satellite system after processing the measured data on orbit is better than that of the original simulation analysis at the baseline length of 700~1050m in formation configuration, it can satisfy the surveying and mapping precision of 1∶50000 scale topographic map in plain and mountain area for China.

Key words: InSAR, DSM, ORI, positioning accuracy

CLC Number:

P236

LI Shizhong, YE Yu, FAN Weikang, CONG Lin, GAO Jingkun, SHAO Long. A brief analysis of the positioning accuracy for the TH-2 satellite system[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(12): 2481-2492.

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