Patent ID: 8026847

Claim:
A method comprising: detecting a first code phase in a first periodically repeating pseudorandom encoded signal received from a first space vehicle (SV) at a reference location; and determining a code phase search range for detection of a second code phase in a second periodically repeating pseudorandom encoded signal received from a second SV at said reference location based, at least in part, on said detected code phase of said first received signal, an estimated azimuth angle to said first SV from said reference location and an estimated azimuth angle to said second SV from said reference location, wherein determining the code phase search range includes determining an estimated code phase of the signal received from the second SV based at least in part on the first code phase, and determining a code phase uncertainty based at least in part on the estimated azimuth angle to said first SV and the estimated azimuth angle to said second SV.