16
$PNMRX104, LLA navigation initialization
This message enables the receiver to be initialized using LLA data to speed up satellite
acquisition. The first 4 values defining the position (if used) must be all present in the message.
Otherwise the whole massage is considered invalid.
Field
Format
Min chars
Max chars
Notes
Message ID
$PNMRX104
8
8
PNMRX104 protocol header. (under dev.)
Latitude
Float
1,2.1
3,2.4
Degrees * 100 + minutes. (under dev.)
N/S Indicator
Char
1
1
N=north or S=south. (under dev.)
Latitude
Float
1,2.1
3,2.4
Degrees * 100 + minutes. (under dev.)
E/W Indicator
Char
1
1
E=east or W=west. (under dev.)
Altitude
Int
(-) 1
(-) 6
Altitude above MSL, in meters.
Clock offset
Int
(0) 1
6
Clock offset of GPS receiver. This changes the clock
bias stored in the settings, not the actual clock bias
used by the system. A cold start is necessary, in order
to use this value.
Time of week
Int
1
6
Offset from start of week in seconds. (under dev.)
Week number
Int
1
4
GPS week number.
Channel count
Int
1
2
Maximum number of TM to be used. Min12, max 16.
Checksum
*xx
(0) 3
3
2 digits.
Message terminator
<CR> <LF>
2
2
ASCII 13, ASCII 10.
-
If used, all five components (Lat, N/S, Long E/W, alt) of the LLA position must be
provided, otherwise the message is declared invalid as a whole
-
Modifying the LLA coordinates triggers a software system reset after successful
execution of the message.
