Technical data

Product Specification
HIF-2121/R5 CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 965-1176-601 REV: D SHEET 141
6.10.14 Internal GPS Status Format
The EGPWS will be capable of displaying the status for up to eight visible satellites being tracked on the eight channels of the
receiver. Note that if the receiver is tracking less than eight satellites, the unused satellite ID’s will be set to zero. The data
will be collected from the receiver and when requested this data will be output to the user. The GPS status is output once and
then not updated, unless another request for GPS status is submitted. Assuming no RS232 communications faults the
information will be formatted as shown below.
XPRESS GPS STATUS:
RS-232 COMMUNICATION OK
STATE: <state>
INTEGRITY STATE: 0x00 MASKED INTEGRITY WARNING: 0x00
BAD COVERAGE: 0x00 ALTITUDE AIDING IN USE: 0x00
NAV MODE: 0x00 ERROR STATUS: 0x408
NUMBER OF SATELLITES TRACKING: 08
CHANNEL SAT ID SNR ELEV AZM HEALTH TRACKING
118451345 3 1
2 31 47 38 120 3 1
3 7 40 10 16 3 1
419475222 3 1
5 27 44 83 151 3 1
6 2 46 56 134 3 1
71348628 3 1
810421664 3 1
State can be one of the following:
INITIALIZATION
SEARCH THE SKY
ACQUISITION
TRANSITION
NAVIGATION
NAVIGATION WITH POSSIBLE DATA COLLECTION
NAVIGATION WITH POSITION DEGRADATION
DEAD RECKON
When a RS232 problem exists the following information will be provided:
XPRESS GPS STATUS:
RS-232 COMMUNICATION FAULT - <RS-232 Xpress faults>
RS-232 Xpress faults can be one of the following:
RECEIVER INACTIVE
TRANSMIT ERROR
MISSING PACKET(S)
CHECKSUM ERROR