Rapid visible satellite selection method based on multimode GNSS receiver

TLDR: In this paper, a rapid visible satellite selection method based on a multimode GNSS receiver is proposed, which comprises the steps that (1) elevation angles, received by the multimode GPS receiver currently, of all visible satellites are calculated, the satellites with the satellite elevation angles smaller than 10 degrees are eliminated, and a usable visible satellite set S is obtained; (2) according to satellite position information of the satellites and receiver preliminary position information, a coefficient matrix and a weight coefficient matrix are calculated; (3) a GDOP value corresponding to S is calculated, a contribution

Abstract: The invention discloses a rapid visible satellite selection method based on a multimode GNSS receiver. The method comprises the steps that (1) elevation angles, received by the multimode GNSS receiver currently, of all visible satellites are calculated, the satellites with the satellite elevation angles smaller than 10 degrees are eliminated, and a usable visible satellite set S is obtained; (2) according to satellite position information of the satellites and receiver preliminary position information, a coefficient matrix and a weight coefficient matrix are calculated; (3) a GDOP value corresponding to the visible satellite set S is calculated; (4) a contribution value delta Gi of each visible satellite to GDOP is calculated and the contribution values delta Gi are ranked from large to small, so that a set SG is formed; (5) when the multimode GNSS receiver needs to select N visible satellites for navigation and location, the front N satellites in the set SG are selected, and a corresponding visible satellite subset is a selected usable satellite constellation. The method has the advantages of being convenient and quick to operate, simple in implementation, high in accuracy, wide in application range and the like.