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|  MIL-D-70789A (AR)
APPENDIX A
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ACCEPT GEODETIC DATA
30.1.5 Command:
From: Prime System To: DRU
Function: This user update command requests the DRU to accept position data
from the prime System in geodetic coordinate form. The DRU accepts update
data when the DRU is stationary.
STATUS DATA message
DRU Response:
COMMAND STRUCTURE
DATA
ERROR DET. CODE
COmMAND
Echo
FLAG(F)
CHARACTERS (E)
FLAG(F)
CHARACTERS(D)
SEQ# (N) CODE(C)
01111110
D1-D19
16 Bits
01111110
XXX
10100
Number of Data Characters: 19
Data Format:
Binary 2's Complement
Command Subcode
D1
Character (8 bits unsigned)
Value:
14
Prime System Spheroid
D2, D3 Characters (16 bits unsigned)
Range: 0-15 (Integer)
Latitude Degrees
D4, D5 Characters. (16 bits)
+ Northern Hemisphere
Range:
90 degrees
- Southern Hemisphere
Resolution: 1 degree
D6, D7, D8, D9 Characters (32 bits unsigned) Latitude minutes
Range:
O t 2459.99999 arc minutes)
Resolution: 1/2 arc minute
Longitude Degrees
D10, D11 Characters (16 bits)
+ East of Greenwitch
Range:
180 degrees
West of Greenwitch
Resolution: 1 degree
D12,D13,D14,D15 Characters (32 bits unsigned) Longitude Minutes
O to4 59.99999 arc minutes)
Range:
2
Resolution: 1/2 arc minute
D16, D17, D18, D19 Characters (32 bits) Altitude
-32,768 to +32,767 meters
Range:
Resolution: 0.01 meters
155
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