190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page C-2
C.4 Attitude/Air Data Message Format
The Attitude/Air Data category contains two message formats. The Attitude/Air Data message format is
transmitted approximately 10 times per second. The Attitude/Air Data Set 2 message format is transmitted
approximately 2 times per second. Table C-1 and Table C-2
explain the message formats.
Table C-1 Attitude/Air Data Message Format
Field Name Offset Width Units Notes Min Max
Escape character 0 1 '='
Sentence ID 1 1 '1'
Sentence version 2 1 Currently '1'
UTC hour 3 2 hours 00 23
UTC minute 5 2 minutes 00 59
UTC second 7 2 seconds 00 59
UTC second fraction 9 2 10 ms 00 99
Pitch 11 4 0.1 degree positive = up -900 +900
Roll 15 5 0.1 degree positive = right -1800 +1800
Heading 20 3 1 degree magnetic 000 359
Airspeed 23 4 0.1 knots 0000 9999
Pressure altitude 27 6 1 foot -01000 +60000
Rate of turn 33 4
0.1 degree/
sec
positive = right -999 +999
Lateral acceleration 37 3 0.01 G positive = leftward -99 +99
Vertical acceleration 40 3 0.1 G positive = upward -99 +99
AOA (Angle of Attack) 43 2
00 = AOA below
minimum calibrated
value
60 = AOA at calibrated
warning threshold value
99 = AOA at or above
calibrated stall value
Min = 00, Max = 99
0 +99
Vertical speed 45 4 10 fpm positive = up -999 +999
Outside air
temperature
49 3 1 degree C -99 +99
Altimeter setting 52 3 0.01 inHg offset from 27.50" 000 400
Checksum 55 2 ASCII hex
sum of all previous
bytes
CR/LF 57 2 0x0D / 0x0A
Total length 59
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