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Page Title:
Accept Position (Navigation Update) |
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|  MIL-D70789A (AR)
APPENDIX A
30.1 Commands that Transfer Data from the prime system and/or CDU to the
DRU
30.1.1 Command:
ACCEPT POSITION (NAVIGATION UPDATE)
From:
Prime System To: DRU
Function:
This user update command requests the DRU to accept the
transmission of position (navigation) data from the prime system. The DRU
accepts update data when the DRU is stationary.
DRU Response:
STATUS DATA Message
COMMAND STRUCTURE
SEQUENCE
ERROR DET. CODE
COMMAND
DATA
FLAG(F) NUMBER(N) CODE(C)
CHARACTERS(D)
CHARACTERS
FLAG(F)
01111110
XXX
16 Bits
00101
D1 - D11
01111110
Number of Data Characters: 11.
Data Format:
Binary 2's Complement
Dl, D2, D3 Characters (24 bits unsigned)
Northing
Range:
0 .to 10,000,000 meters
Resolution: 1 meter
D4, D5 Characters (15 bits)
Altitude
Range:
-16,384 to +16,383 meters
Resolution:
1 meter
If KU Parameters Configuration
M Character (7 bits)
Range:
Flag reset: Zone number of
A 61 (Integer)
+ indicates northern hemisphere;
Extended Zone (DRU ignores sign)
or set s61 for Normal Zone.
-, southern
If KU Parameters Configuration
Flag set: BCU Hemisphere and
Zone
Hemisphere &
D7 Character (7 bits)
Zone of DRU
Range:
A 60 (Integer)
+ indicates northern hemisphere;
-, southern
149
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