The correction method of overall pseudo-rotation on autonomous navigation of navigation constellation

This paper takes research on the reason and elimination method of overall pseudo-rotation of navigation constellation. The inter-satellite ranging system errors can cause the overall pseudo-rotation of navigation constellation. In this paper, the reasons for overall pseudo-rotation of navigation constellation have been analyzed for four different systematic errors. Studies show that, short-cycle system errors and long-cycle system errors do not cause the overall pseudo-rotation, constant system errors may cause the overall pseudo-rotation, and linear system errors usually can cause the overall pseudo-rotation. When constant system errors or linear system errors of all satellites have the same direction, the overall pseudo-rotation of navigation constellation will occur. On this basis, this paper uses the overall pseudo-rotation correction algorithm to eliminate the overall pseudo-rotation of navigation constellation, simulation analysis shows that the algorithm can effectively eliminate the overall pseudo-rotation of navigation constellation. Finally, combining with the engineering practice of autonomous navigation, the paper gives the conclusions that on-board data processing units should adopt the overall pseudo-rotation correction algorithm to eliminate the overall pseudo-rotation of navigation constellation. © 2012 Springer-Verlag.