Application of Interferometric Tracking by China DSN in CE-3 Soft Landing

This paper discussed the possibility of application of Interferometric tracking to track CE'3 during Soft Landing by China Deep Space Network. Algorithm of adaptive model reconstruction and interferometric phase unwrapping are discussed in details, which can avoid accuracy of predict orbit deteriorate caused by spacecraft maneuver and can keep interferometric phase continuous. Based on data analysis in project, the accuracy of the interferometric tracking is in the order of 0.3ns, which corresponds to 30nrad angular accuracy.