Leica GR30 - Examples

Appendix B: NMEA Messages
255
x.x
Speed over ground in knots
x.x
Course over ground in degrees
xxxxxx
Date: ddmmyy
x.x
Magnetic variation in degrees
a
East or West
a*hh
Mode Indicator
A = Autonomous mode
D = Differential mode
N = Data not vaild
<CR>
Carriage Return
<LF>
Line Feed
Examples
Standard Talker ID
$GNRMC,113616.00,A,4724.5248557,N,00937.1063064,E,0.01,11.43,100406,11.43,E,D*1C
User defined Talker ID = GN
$GNRMC,113806.00,A,4724.5248547,N,00937.1063032,E,0.00,287.73,100406,287.73,E,D*10
B12: VTG - Course Over Ground and Ground Speed
Syntax
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K,a*hh<CR><LF>
Description of fields
Field
Description
$--VTG
Header including talker ID
x.x
Course over ground in degrees true North, 0.0 to 359.9
T
Fixed text T for true North
x.x
Course over ground in degrees magnetic North, 0.0 to 359.9
M
Fixed text M for magnetic North
x.x
Speed over ground in knots
N
Fixed text N for knots
x.x
Speed over ground in km/h
K
Fixed text K for km/h
a
Mode Indicator
A = Autonomous mode
D = Differential mode
N = Data not valid
*hh
Checksum
<CR>
Carriage Return
<LF>
Line Feed
Examples