An accuracy measurement method for star trackers based on direct astronomic observation.

ABSTRACT: Star tracker is one of the most promising optical attitude measurement devices and it is widely used in spacecraft for its high accuracy. However, how to realize and verify such an accuracy remains a crucial but unsolved issue until now. The authenticity of the accuracy measurement method of a star tracker will eventually determine the satellite performance. A new and robust accuracy measurement method for a star tracker based on the direct astronomical observation is proposed here. In comparison with the conventional method with simulated stars, this method utilizes real navigation stars as observation targets which makes the measurement results more authoritative and authentic. Transformations between different coordinate systems are conducted on the account of the precision movements of

SUBMITTER: Sun T 

PROVIDER: S-EPMC4984851 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature