Hdt - Heading, True; Llk - Leica Local Position And Gdop - Leica iCON aps 200 User Manual

Example
A.11
Syntax
Description of fields
Examples
A.12
Syntax
Description of fields
NMEA Message Formats
Field Description
*hh Checksum; data always begins with *
$GPGST,172814.0,0.006,0.023,0.020,273.6,0.023,0.020,0.031*6A

HDT - Heading, True

$--HDT,x.x,T*hh<CR><LF>
Field
$--HDT
x.x
T
*hh
<CR>
<LF>
Standard Talker ID
$GNHDT,11.4,T, 00*4B

LLK - Leica Local Position and GDOP

$--LLK,hhmmss.ss,mmddyy,eeeeee.eee,M,nnnnnn.nnn,M,x,xx,x.x,x.x,M*hh
<CR><LF>
Field Description
$--LLK Header including talker ID
hhmmss.ss UTC time of position
mmddyy UTC date
eeeeee.eee Grid Easting in metres
M Units of grid Easting as fixed text M
nnnnnn.nnn Grid Northing in metres
M Units of grid Northing as fixed text M
x Position quality
0 = Fix not available or invalid
1 = No real-time position, navigation fix
2 = Real-time position, ambiguities not fixed
3 = Real-time position, ambiguities fixed
5 = Real-time position, float
xx Number of satellites in use. For $GNLLK messages: The com-
bined GPS, GLONASS, Galileo and BeiDou satellites used in
the position.
x.x GDOP
Description
Header including talker ID
Heading, degrees True
Fixed text T for true north
Checksum
Carriage Return
Line Feed
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