The Philippine GSMS (GNSS Signal Monitoring System) provides predicted / current /past RAIM Service outage information in the Manila FIR. A non-stop operation. 365 days and 24 hours a day.


It supports the following:

En-route / En-route (Terminal) / NPA flight phases.

• AIS for RAIM related NOTAM issue.

• 72 hours service level prediction.

• To apply GPS outage information into prediction (NANU (Notice Advisory to  Navstar Users) by USNO (The United States Naval Observatory) to calculation.)


 “Only Philippine AIP subscribers can register on this site.”

To Register/Log In on the GSMS website click here