13 October 2008

New GPS SPS Performance Standard

Finally, the U.S. Government published the new GPS SPS (Standard Positioning Service) performance standard. The new document is freely available on the PNT website. It introduces improvements to the previous version, publisehd in 2001. The most important changes are the better signal-in-space (SIS) range accuracy and the new definition for the GPS constellation with more than 24 satellites.