Global positioning system (GPS) receiver and method of determining location of GPS receiver

A Global Positioning System (GPS) receiver, comprising:

• a GPS 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 from the decoded navigation data;
• 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 at least one visible satellite candidate with the almanac information;
• and
• a navigation filter configured to calculate a 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, and to determine a location of the GPS receiver using the calculated pseudo-ranges.