Using the External Computer Data Link MicronNav System
0656-SOM-00001-07 118 © Tritech International Ltd.
‘$RATTM’ Reply Data Structure
Data Description Data Range Field Range
Comma separator Always ‘,’ ,
Time of data, UTC = hhmmss.ss 000000.00 to 235959.99 hhmmss.ss
Comma separator Always ‘,’ ,
Type of acquisition Always ‘A’ A = Auto, M = Manual, R =
Reported
Delimiter (asterisk) Always ‘*’ *
Checksum (in Hexadecimal)
(XOR of bytes between, but not inclusive
of, '$' and '*')
00 to FF cc
(Carriage Return + Line Feed) N/A <CR><LF>
Example:
Target Number / Unit ID = 0 (Responder), Horizontal Target Range = 2 metres = 0.0011 nautical
miles, Relative Target Bearing = 326.0º, UTC Time of reading = 005940.13.
ASCII Output Always (on a single line) =
“$RATTM,00,0.0011,326.0,R,0.0,0.0,R,0.0,0.0,N, TARGET1,T,,005940.13,A*5B<CR><LF>”
Where; “<CR>” is Carriage Return (ASCII code 13), “<LF>” is Line Feed (ASCII code 10).
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