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Operating with SBAS active outside of the service area may cause elevated EPU values to
display on the status page. Regardless of the EPU value displayed, the LOI annunciation
is the controlling indication for determining the integrity of the GPS navigation solution.
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altitude, track, and ground speed data. GPS status annunciates under the following
conditions.
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EGNOS
Most of Europe and parts of North Africa.
GAGAN
India only.
MSAS
Japan only.
WAAS
Alaska, Canada, the 48 contiguous states,
and most of Central America.
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Acquiring
GPS receiver uses last known position and satellite orbital
data (collected continuously from satellites) to determine
which satellites should be in view.
3D Nav
3D navigation mode. GPS receiver computes altitude using
satellite data.
3D Diff Nav
3D navigation mode. Differential corrections from SBAS
provider are in use.
LOI
Satellite coverage is insufficient to pass built-in integrity
monitor
ing tests.
SBAS supports wide area or regional augmentation through the
use of additional satellite broadcast messages.
Tap this key and select from the list of providers.
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