Analysis on first Delta-DOR tracking by China DSN in CE'3 project

This paper describes the first implementation of Delta-DOR (Delta-Differential One-Way Ranging) in CE'3 navigation within China DSN(Deep Space Network). Tracking data during CE'3 cruise to the moon is analyzed. Compared with high accurate orbit ephemeris, time delay error in the delta-DOR measurement is less than 1ns, which corresponds to an angular accuracy of about 90nrad or 37m uncertainty on the probe position at 380000km. Delta-DOR tracking has played an important role in CE'3 navigation.