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4. INSTALLATION
GLL: Latitude and longitude
$--GLL,llll.lll,a,yyyyy.yyy,a,hhmmss.ss,A,a*hh<CR><LF>
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+---+----------------------------------- 1
1. Latitude, N/S
2. Longitude, E/W
3. UTC of position
4. Status: A=data valid, V=data invalid
5. Mode indicator (see note)
6. Checksum
NOTE Positioning system Mode indicator:
A = Autonomous
D = Differential
E = Estimated (dead reckoning)
M = Manual input
S = Simulator
N = Data not valid
The Mode indicator field supplements the Status field. The Status field shall be
set to V=invalid for all values of Operating Mode except for A=Autonomous and
D=Differential. The positioning system Mode indicator and Status field shall not
be null fields.
4-12
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+------+----------------------- 2
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+----------- 4
+---------------- 3
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