Displaying GPS Receiver Information
Continuous built in tests are performed to ensure the GPS receiver is providing accurate data to the display(s).
The AXIS™ flight displays can be configured to share GPS information (refer to the AXIS Installation Manual for configuration information). For example, a GDU can be configured to share its GPS position, velocity, and time data with another GDU. If a GDU is not using its own GPS receiver, the name of the GDU providing the data (i.e., ‘3D GPS Location (PFD)’ or ‘3D GPS Location (MFD)’) is displayed on the PFW.
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ACQUIRING － The sensor is in the process of acquiring enough satellites for navigation.
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ENR OK － The sensor is tracking a sufficient number of satellites to compute a 3 dimensional navigation solution suitable for GPS-based enroute operation.
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TERM OK － The sensor is tracking a sufficient number of satellites to compute a 3 dimensional navigation solution suitable for GPS-based terminal operation.
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LNAV OK － The sensor is tracking a sufficient number of satellites to compute a 3 dimensional navigation solution suitable for non-precision GPS-based approach operation.
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LPV OK － The sensor is tracking a sufficient number of satellites to compute a 3 dimensional navigation solution and suitable for LNAV/VNAV and LPV approach operation using SBAS corrections.