USAF Announces Civil Navigation Test Vectors for the First GPS IIF Satellite

The first-ever GPS IIF space vehicle was successfully launched from Cape Canaveral AFS on 27 May 2010.

The GPS Wing historically executes an extended on-orbit checkout period for each new GPS space vehicle family to evaluate navigation signal performance and to baseline satellite operating characteristics. The GPS IIF satellite is currently in the middle of its checkout process, and civil signal monitoring is an integral part of the GPS Wing’s L-Band Signal-in-Space (SIS) performance assessment.

The GPS Wing, in cooperation with the Federal Aviation Administration (FAA) and U.S. Coast Guard Navigation Center (NAVCEN), developed a small set of CNAV test vectors which will be broadcasted during this performance assessment. The CNAV Test Vectors are available for download from the NAVCEN web site ( Civil users having questions regarding the test vectors or their use, should file a GPS Inquiry at the NAVCEN using the following link.

Watch the NAVCEN page for release of the test schedule Click on the links for details.