Abstract
The lunar rendezvous and docking (RVD) technology is an important guarantee for our third phase of lunar exploration. In this paper, by using VLBI (Very Long Baseline Interferometry) delay of CE03 (Chang’e-03) which was around the lunar, the changing of differential group delay (DGD) under the SBI (same-beam VLBI) observation mode was simulated. The simulation results indicated that the orbit distance between Orbiter and Ascender Combination (Ascender and Returner) was kept in 100 kilometers, and it lasted for half an hour, the track information of these two were well reflected by DGD which can be used for orbit determination. In the approach stage, DGD is rapidly approaching to 0, as Ascender Combination accelerated and closed to the orbiter, while the orbit distance was reduced from 5km to 20m, and was rapidly increased as Ascender Combination was far away from Orbiter. At last, using VLBI delay of CE03 which was halfway to the lunar, and transmitted two DOR (Differential One-Ranging) signals that were observed by CVN (Chinese VLBI Network), we calculated DPD (Differential Phase Delay), and preliminarily showed the error of DPD.
Published Version
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