System and method for determining GPS receiver position

A global positioning system (GPS) receiver, the GPS receiver comprising:

• a processor;
• and
• a computer-readable memory encoded with instructions for commanding the processor to execute steps including:
• identifying a first satellite and a second satellite that have an unobstructed communication path to the GPS receiver, and receiving data used to determine:
• a satellite position for each of the first satellite and the second satellite, and
• a code phase for a transmitted satellite signal for each of the first satellite and the second satellite;
• calculating a relative code phase between the transmitted satellite signals of the first satellite and the second satellite, the relative code phase being a difference between the determined code phases;
• estimating a position of the GPS receiver, the estimated position being associated with an estimated receiver time;
• calculating a satellite time for each of the first satellite and the second satellite, the calculating being based on the estimated position of the GPS receiver at the estimated receiver time and the satellite positions of the first satellite and the second satellite;
• and
• solving an equation based on the calculated satellite times and the relative code phase to determine a position of the GPS receiver.