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|  iMIL-D-70789A (AR)
APPENDIX D
*************************************************************************
30.4.9 Message: POSITION DATA
From:
DRU To:
Prime System
Number of Data Characters: 10
Data Format:
Binary 2's Complement
MESSAGE STRUCTURE
ERROR DET.
STATUS
ECHO
DATA(D)
CODE (E) FLAG(F)
FLAG(F)
SEQ#(N) IDENTIFIER(I) S1,S2
16 bits 01111110
D1-D10
16 Bits
01000
01111110 XXX
These ten characters of data represent the spheroid, hemisphere, zone,
coordinates and altitude.
Spheroid
D1 Character (ME unsigned)
Range:
0 to 15
Hemisphere and Zone
D2 Character (7 bits}
Range: -60 to +60, (Integer)
+ indicates northern hemisphere;
- indicates southern
Easting
D3, D4, D5 Characters (20 bits)
0 to 999,999 meters (unsigned binary)*
Range:
Resolution: 1 meter
D6, D7, D8 Characters (24 bits, unsigned binary) Northing
Range:
0 to 10,000,000 meters
Resolution: 1 meter
Altitude
D9, D10 Characters (15 bits)
-16~384 to +16,383 meters**
Range:
Resolution: 1 meter
* Actual limits are the UTM zone boundaries plus zone extension which are
latitude and spheroid dependent.
** For altitudes outside the range, the output values shall be fixed at
-163B4 for negative altitudes and +16383 for positive altitudes.
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