EXAMPLE-
The following is an example of a GPS testing NOTAM:
!GPS 06/001 ZAB NAV GPS (INCLUDING WAAS, GBAS,
AND ADS-B) MAY NOT BE AVAILABLE WITHIN A
468NM RADIUS CENTERED AT 330702N1062540W

(TCS 093044) FL400-UNL DECREASING IN AREA
WITH A DECREASE IN ALTITUDE DEFINED AS:
425NM RADIUS AT FL250, 360NM RADIUS AT

10000FT, 354NM RADIUS AT 4000FT AGL, 327NM
RADIUS AT 50FT AGL. 1406070300-1406071200.

(3) Civilian pilots may obtain GPS RAIM
availability information for non-precision approach
procedures by using a manufacturer-supplied RAIM
prediction tool, or using the Service Availability
Prediction Tool (SAPT) on the FAA en route and
terminal RAIM prediction website. Pilots can also
request GPS RAIM aeronautical information from a
flight service station during preflight briefings. GPS
RAIM aeronautical information can be obtained for
a period of 3 hours (for example, if you are scheduled
to arrive at 1215 hours, then the GPS RAIM
information is available from 1100 to 1400 hours) or
a 24-hour timeframe at a particular airport. FAA
briefers will provide RAIM information for a period
of 1 hour before to 1 hour after the ETA hour, unless
a specific timeframe is requested by the pilot. If flying
a published GPS departure, a RAIM prediction
should also be requested for the departure airport.

(4) The military provides airfield specific
GPS RAIM NOTAMs for non-precision approach
procedures at military airfields. The RAIM outages
are issued as M-series NOTAMs and may be obtained
for up to 24 hours from the time of request.

(5) Receiver manufacturers and/or data-

base suppliers may supply "NOTAM" type

information concerning database errors. Pilots

should check these sources, when available, to ensure

that they have the most current information

concerning their electronic database.

(h) Receiver Autonomous Integrity Monit-
oring (RAIM)

(1) RAIM outages may occur due to an
insufficient number of satellites or due to unsuitable
satellite geometry which causes the error in the
reception and RAIM warnings may occur due to
aircraft dynamics (changes in pitch or bank angle).
Antenna location on the aircraft, satellite position
relative to the horizon, and aircraft attitude may affect

reception of one or more satellites. Since the relative
positions of the satellites are constantly changing,
prior experience with the airport does not guarantee
reception at all times, and RAIM availability should

always be checked.

(2) If RAIM is not available, use another

type of navigation and approach system, select

another route or destination, or delay the trip until
RAIM is predicted to be available on arrival. On
longer flights, pilots should consider rechecking the
RAIM prediction for the destination during the flight.
This may provide an early indication that an
unscheduled satellite outage has occurred since
takeoff.

(3) If a RAIM failure/status annunciation
occurs prior to the final approach waypoint
(FAWP), the approach should not be completed since
GPS no longer provides the required integrity. The
receiver performs a RAIM prediction by 2 NM prior
to the FAWP to ensure that RAIM is available as a
condition for entering the approach mode. The pilot
should ensure the receiver has sequenced from
"Armed" to "Approach" prior to the FAWP (normally
occurs 2 NM prior). Failure to sequence may be an
indication of the detection of a satellite anomaly,
failure to arm the receiver (if required), or other
problems which preclude flying the approach.

(4) If the receiver does not sequence into
the approach mode or a RAIM failure/status
annunciation occurs prior to the FAWP, the pilot must
not initiate the approach or descend, but instead
proceed to the missed approach waypoint ( MAWP)

via the FAWP, perform a missed approach, and

contact ATC as soon as practical. The GPS receiver

may continue to operate after a RAIM flag/status

annunciation appears, but the navigation information

should be considered advisory only. Refer to the

receiver operating manual for specific indications
and instructions associated with loss of RAIM prior
to the FAF.

(5) If the RAIM flag/status annunciation
appears after the FAWP, the pilot should initiate a
climb and execute the missed approach. The GPS
flag/status annunciation appears, but the navigation
information should be considered advisory only.
Refer to the receiver operating manual for operating
mode information during a RAIM annunciation.