The gravity field recovery from GRACE (Gravity Recovery and Climate Experiment) mission data is contaminated by both observation noise and dynamic force errors, especially the temporal aliasing errors. To reduce their influence, four approaches are widely adopted, namely the estimation of empirical accelerations (ACC approach), the estimation of K-band range-rate parameters (KBR approach), the ...
Efficient Variance Component Estimation (VCE) is significant to optimal data combination in large-scale least-squares problems as those encountered in satellite geodesy, where millions of observations are jointly processed to estimate a huge number of unknown parameters. In this paper, an efficient VCE algorithm with rigorous trace calculation is proposed based on the local–global parameters p...
The gravity field recovery from GRACE (Gravity Recovery and Climate Experiment) mission data is contaminated by both observation noise and dynamic force errors, especially the temporal aliasing errors. To reduce their influence, four approaches are widely adopted, namely the estimation of empirical accelerations (ACC approach), the estimation of K-band range-rate parameters (KBR approach), the ...
Efficient Variance Component Estimation (VCE) is significant to optimal data combination in large-scale least-squares problems as those encountered in satellite geodesy, where millions of observations are jointly processed to estimate a huge number of unknown parameters. In this paper, an efficient VCE algorithm with rigorous trace calculation is proposed based on the local–global parameters p...
On January 15, 2022, Dr. Yu Hongjuan, under the guidance of the team teacher, successfully passed the opening defense of the dissertation and was unanimously praised. During the doctoral defense, I had the honor to invite an expert in this field, researcher Wu Bin of Shanghai Observatory of Chinese Academy of Sciences, who highly affirmed Dr. Hong Juan's preliminary work and achievements, and p...
From July 5 to July 6, 2022, Dr. Nie Yufeng of the team attended the COST-G meeting. At the meeting, Dr. Nie Yufeng made a report entitled "global gravity filed estimation from LEO satellite observations at Tongji University". The report introduced the gravity field inversion conducted by the gravity team of Tongji University using low orbit satellite observation data, which provided a referenc...
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