| Citation: | ZHANG Yun, MA Dehao, MENG Wanting, et al. Sea surface height inversion of GPS reflected signal based on TechDemoSat-1 satellite[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(10): 1941-1948. doi: 10.13700/j.bh.1001-5965.2020.0357(in Chinese)
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The problems of using GPS-Reflectometry (GPS-R) measured data to establish satellite-borne sea surface height inversion model are studied and its validity is verified. The data of TechDemoSat-1 (TDS-1) and the retrieval technique of Delay-Doppler Map (DDM) were used to analyze the errors in the retrieval of satellite-borne GPS-R sea surface height, and the error models were established. The satellite-borne GPS-R sea surface height inversion model was optimized. Meanwhile, the DTU15 global mean sea surface and sea tide model was adopted to verify the inversion accuracy. The results show that the Mean Absolute Deviation (MAD) of the global sea surface height inversion results obtained by the optimized inversion model is 6.05 meters, and the accuracy is improved by about 29%, effectively improving the accuracy of SST inversion. The research results have certain significance for promoting the application of spaceborne GNSS-Reflectometry (GNSS-R) in sea surface height inversion.
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