Entity

Time filter

Source Type

Shanghai, China

Chen S.,Beijing Institute of Technology | Dong G.,Beijing Institute of Technology | Li H.,Beijing Institute of Technology | Liu Q.,China Science Academy | And 2 more authors.
Proceedings - 2012 IEEE 12th International Conference on Computer and Information Technology, CIT 2012 | Year: 2012

The model of same beam interferometry and the accuracy of the differential phase delay are analyzed for the requirement of the high precision ground based navigation and guidance in lunar orbit rendezvous and docking. The model of time delay closure of Very Long Baseline Interferometry is introduced, the accurate close differential time delay of Same Beam Interferometry is gained based on the definition of the same wave front SBI. The value of differential time delay closure is calculated by the observation data of the SELENE mission, the result shows that the precision of differential phase delay closure is in the range of 0.5-1picosecond. The model in this paper could evidently reduce the trend in differential time delay closure, it could be used for the real-time errors detection of observational data obtained by different baseline. © 2012 IEEE.


Chen S.-W.,Beijing Institute of Technology | Chen S.-W.,China Science Academy | Dong G.-L.,Beijing Institute of Technology | Li H.-T.,Beijing Institute of Technology | And 3 more authors.
Yuhang Xuebao/Journal of Astronautics | Year: 2013

The model of differential phase delay of same beam interferometry (SBI) is analyzed according to the requirement for the high accuracy ground based guidance and navigation of the lunar orbit rendezvous and docking mission. The differential phase delay measurement model of same beam interferometry is propagated based on the same wave front definition of very long baseline interferometry (VLBI). An accurate differential phase delay closure algorithm of same beam interferometry is derived based on the definition of the same wave front of SBI and the geometry delay closure algorithm of VLBI. The value of differential phase delay closure is calculated by using the observation data of the SELENE mission of Japan, and the result shows that the accuracy of differential phase delay closure is in the range of 0.5~1 ps. The algorithm given in the paper could evidently reduce tends of differential phase delay closure, and the validity of the measurement model is verified in this paper. It is of some significance for high accuracy ground-based navigation of the forthcoming lunar orbit rendezvous and docking mission.

Discover hidden collaborations