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EFFECTIVITY
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General
These are the components in the flight compartment that have a
relation to the GPS:
* Control display units
* Master caution annunciator
* Master caution lights
* IRS master caution unit
* Annunciation and dimming module
* IRS mode select unit.
GPS - FLIGHT COMPARTMENT COMPONENT LOCATION
EFFECTIVITY
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GPS - FLIGHT COMPARTMENT COMPONENT LOCATION
GPS - FLIGHT COMPARTMENT COMPONENT LOCATION
EFFECTIVITY
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General
GPS sensor units are in the multi mode receivers (MMR). The
MMRs are in the electronic equipment compartment. MMR 1 is
on the E1-2 shelf. MMR 2 is on the E1-4 shelf.
GPS - COMPONENT LOCATION
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GPS - COMPONENT LOCATION
GPS - COMPONENT LOCATION
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General
The GPS antennas are on the top of the fuselage.
GPS - ANTENNA LOCATIONS
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GPS - ANTENNA LOCATIONS
GPS - ANTENNA LOCATIONS
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GPS - ANTENNA LOCATIONS
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Power and Antenna Interface
Each multi-mode receiver (MMR) has a circuit breaker. The
115v ac buses supply power to the MMRs.
Each MMR receives a radio frequency (RF) signal from a GPS
antenna.
ADIRU Data Buses
The MMRs get inertial reference data from the ADIRUs. Each
MMR receives IR data from its onside ADIRU and the offside
ADIRU. During normal operation, MMR 1 uses L ADIRU data
and MMR 2 uses R ADIRU data. If there is a loss of data from an
ADIRU, the MMR will use the data from the offside ADIRU.
The MMRs use this data for system initialization and to help
system operation during periods of low satellite coverage.
MMR Data Output Bus
The MMR sends out this data:
* GPS latitude
* GPS latitude Fine
* GPS longitude
* GPS longitude fine
* Clock time and date
* GPS status
* Horizontal figure of merit
* Horizontal integrity limit.
The MMR sends the data to these units:
* FMC 1
* Clocks, captain and first officer
* Ground proximity warnining computer (GPWC)
* IRS master caution unit.
Flight Management Computer (FMC)
The MMRs send these GPS parameters to the FMC:
* Latitude
* Longitude
* Time
* Horizontal figure of merit
* Horizontal integrity limit.
The FMC uses the data for FMC position update and actual
navigation performance (ANP) calculation.
Clock
The clock uses GPS time and date.
Ground Proximity Warning Computer
The MMRs send these GPS parameters to the ground proximity
warning computer:
* Latitude (coarse)
* Longitude (coarse)
* Latitude (fine)
* Longitude (fine)
GPS - INTERFACES
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* Ground speed
* True track
* Altitude
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