Research on Space Tracking Ship Position Data Equivalent Calculation

Abstract

The difference of inertia navigation device distribution between traditional space TT&C ship and new space TT&C ship is discussed. Because the inertia navigation device distribution can affect observation mode and ship position data usage, ship position equivalently calculation is raised base on analysis of Inertia navigation system (INS) distribution design. The problem is conversed to a universal 2 point position equivalent calculation. The position equivalent calculation process is divided into 3 sub-process by introduction of earth centered fixed coordinate frame (ECFCF) as intermediate coordinate system. All mathematical expression in the process is presented. At last, the equivalent calculation method is tested by using space TT&C ship’s flight check data.