Patent Document ID: 9696408
Application ID: 14614140
Patent Status: 1

Claim One:
1. A computer-implemented method for providing integrated attitude determination and attitude control for slewing of a satellite, said method comprising the steps of: after receiving a repointing request, selecting, via one or more processors, a guide star sample comprising one or more guide stars from a guide star catalog, wherein each guide star selected for the guide star sample has a measured brightness brighter than a predetermined value; determining, via the one or more processors, current attitude information; selecting and retrieving, via the one or more processors, at least one point spread function (PSF) image from a PSF library, the selection based at least in part on the current attitude information; estimating, via the one or more processors and based at least in part upon the current attitude information, an expected position for at least one guide star, the at least one guide star being one of the guide stars of the guide star sample; acquiring, via one or more processors and at least one image capture device on the satellite, at least one star tracker image; calculating, via the one or more processors, a cross-correlation function (CCF) based on a sub-image of the selected and retrieved PSF image, the star tracker image, and the expected position for the at least one guide star, the calculation determining shifts in position of the at least one guide star compared to the expected position; and determining, via the one or more processors, updated current attitude information based at least in part on the determined shifts in position.