Abstract We analyze the influence of errors such as pole shift, tidal nutation, and constant deviation matrix in the process of ITRS to J2000, and analyze the impact of seasonal changes, solar activities, geomagnetic activities, etc. on the accuracy loss of coordinate conversion. The coordinate analysis of the IGS precision ephemeris data of 2019 shows that the coordinate conversion error caused by the tide and nutation is 0.44 m, the spring coordinate conversion error is 0.23 mm, and the spring coordinate conversion error is about 3 times that of summer, autumn and winter. The constant deviation matrix can affect the coordinate conversion error by 1.7 m. The error correction term is added to the orbit conversion of the neutral atmosphere occultation inversion. The tidal nutation and the constant deviation matrix cause the error effects of 0.09 K and 0.19 K respectively on the inverted temperature products. It is recommended to use the high frequency correction of tidal nutation in the inversion of GNSS radio occultation, and it is recommended to perform a constant deviation matrix for rotation processing during the conversion of ITRS to J2000.
DONG Qijia,CHENG Yan,ZHOU Zhonghua et al. Analysis of ITRS to J2000 Coordinate System Conversion Error and Its Influence on Occultation Inversion[J]. jgg, 2021, 41(5): 530-534.
DONG Qijia,CHENG Yan,ZHOU Zhonghua et al. Analysis of ITRS to J2000 Coordinate System Conversion Error and Its Influence on Occultation Inversion[J]. jgg, 2021, 41(5): 530-534.