Abstract We carry out precise orbit determination research of the GRACE-FO satellite, and process the 14-day on-board GPS data by the reduced-dynamic method, and perform accuracy analysis. For the comparison of the reduced-dynamic orbit with ambiguity resolution parameters by UPD method and the float solution orbit, we carry out carrier phase residual analysis, overlapping arc comparison, reference orbit comparison, and KBR check. The results show that the carrier phase residual of the fixed solution orbit of the GRACE-FO satellite is about 1 cm, which is 1 to 2 mm larger than the float solution. The RMS of 3-day fixed solution overlapping arc difference is less than or equal to 9.4 mm in the radial, tangential and normal directions, which is better than float solution of 12.4 mm. Compared with the precision scientific orbit provided by GFZ, the GRACE-C satellite reduced-dynamic fixed solution orbit has a mean RMS of less than 1 cm in all directions, which means that the calculated orbit has a high consistency with PSO. The residual RMS value of the KBR check after ambiguity resolution decreases from 9.6 mm to 6.7 mm, which indicates that the fixed solution can further improve the relative position accuracy between GRACE-FO satellites. The ambiguity resolution can improve the orbit determination accuracy of GRACE-FO satellite and provide more reliable orbit service.
GONG Jiabo,ZHOU Xingyu,CHEN Yan et al. Precision Analysis on Reduced-Dynamic Orbit Determination of GRACE-FO Satellite with Ambiguity Resolution[J]. jgg, 2021, 41(11): 1127-1132.
GONG Jiabo,ZHOU Xingyu,CHEN Yan et al. Precision Analysis on Reduced-Dynamic Orbit Determination of GRACE-FO Satellite with Ambiguity Resolution[J]. jgg, 2021, 41(11): 1127-1132.