Analysis and Amelioration of Incoming Trajectory Curve Abnormity

This article is based on analysis and amelioration of incoming trajectory curve abnormity encountered by an instrumentation ship in a tracking mission.First,trajectory curve Xi'an Satellite Control Center sends to tracking stations is analyzed.Abnormity of the velocity data in the trajectory curve is found when the data sent by the stations to Xi'an Satellite Control Center is transformed to trajectory curve.The reason is S-variation caused by lack of angular velocity data in the data sent by the tracking stations.Following verification of test results,a proposal is given on modification of the structure of the data sent to Xi'an Satellite Control Center.