GPS 500 Pilot’s Guide and Reference
SECTION 13 – FAULT DETECTION
AND EXCLUSION
13-2
13.2 PRE-DEPARTURE VERIFICATION OF FDE
Since
FDE is based upon the exclusion of ‘bad’ satellites,
it is necessary to ensure there will be an adequate number
of satellites in the GPS constellation that are still able to
provide a navigation solution. An FDE prediction must be
performed prior to departure for a flight involving:
• Oceanic/Remote operation where GPS is to be the
sole source of navigation per FAA Notice 8110.60
• U.S. Area Navigation (RNAV) routes, Standard
Instrument Departures (SIDs), or Standard
Terminal Arrival Routes (STARs) if a NOTAM
indicates a GPS satellite (or satellites) is scheduled
to be out-of-service, per FAA AC 90-100 ‘U.S.
Terminal and En Route Area Navigation (RNAV)
Operations’
Prior to departure, the operator must use the
FDE
Prediction Program supplied with the 500 Series Trainer
Software (Figure 13-2) to demonstrate that there are no
outages in the capability to navigate on the specified
route of flight (the FDE Prediction Program determines
whether the GPS constellation is robust enough to provide
a navigation solution for the specified route of flight). The
trainer software and the document ‘400/500 Series FDE
Prediction Instructions’ (190-00643-00) are available on
Garmin’s website (www.garmin.com) for free download.
Figure 13-2 Garmin 500 Series Trainer Software
190-00181-60 Rev. G
Summary of Contents for GPS 500
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