Patent ID: 8493266
Filing Date: 2013-07-23
Classification: G01S

Abstract:
1. A location determination receiver, comprising: a receiving unit configured to receive navigation data from at least one visible satellite; a decoder configured to decode the received navigation data to extract time and almanac information; a database configured to store satellite disposition information; a satellite location determining unit configured to select at least one visible satellite candidate using the time information and the satellite disposition information, and to determine locations-in-space of the selected at least one visible satellite candidate using the almanac information; and a navigation filter configured to calculate pseudo-ranges from the at least one visible satellite and the selected at least one visible satellite candidate using the locations-in-space of the at least one visible satellite and the selected at least one visible satellite candidate, without the receiving unit receiving signals from the at least one visible satellite candidate, and to determine a geographic location of the receiver using the calculated pseudo-ranges.