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|  MIL-D-70789A (AR)
APPENDIX D
***************************************************************************
30.4.4 Message: ATTITUDE DATA
From:
DRU
To:
Prime System
Number of Data Characters: 12
Data Format:
Binary 2's Complement
MESSAGE STRUCTURE
ECHO
STATUS
ERROR DET.
FLAG(F)
SEQ#(N) IDENTIFIER(I) S1,S2
DATA (D)
CODE (E) FLAG(F)
01111110 XXX
00010
16 Bits
D1-D12
16 bits 01111110
This data represents Pointing Device geodetic or grid azimuth, Pointing
Device Pitch with respect to local level, vehicle cant or roll, and Pointing
Device azimuth and pitch rates.
D1, D2 Characters-(16 bits, unsigned binary)
Pointing Device
Range:
0 to 6,399.9 mils
Geodetic or Grid
Resolution: 0.1 mil
Azimuth
D3, D4 Characters (15 bits)
Pointing Device
Range:
-1600 to +1600 mils
Pitch (Elevation Angle)
Resolution: 0.1 mil
D5, D5, D6 Characters (15 bits)
Vehicle Cant or Roll
Range:
-1638.4 to +1638.3 mils*
Resolution: 0.1 Mil
D7, D8 Characters (15 bits)
Vehicle Pitch
Range :
-1600 mils to +1600 mils
Resolution: 0.1 mil
D9, D10 Characters (16 bits)
Pointing Device
Range:
Azimuth Rate
-5890.24 to +5898.06 mils/see*
Resolution 0.18 mil/sec
D11, D12 Characters (16 bits)
Pointing Device
Range:
-5898.24 to +5898.06 mils/see*
Pitch (Elevation Angle)
Resolution: 0.18 mil/sec
Rate
* For values outside the range, the output value shall be fixed at the
appropriate positive or negative range limit.
183
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