NaviSys Technology - Your Location Partner
User’s Manual - GR-312
20
3.6 GPRMC - Recommended Minimum Specific GNSS Data
Example
$GPRMC,151229.487,A,3723.2475,N,12148.3416,W,0.13,309.62,120598,,,A*5F
Explanation
Contents
Example
Unit
Explanation
Message ID
$GPRMC
RMC protocol header
UTC Time
151229.487
hhmmss.sss
hh: hour, mm: minute, ss: second
Status
A
A: Data valid, V: Data invalid
Latitude
3723.2475
ddmm.mmmm
dd: degree, mm.mmmm: minute
North/South
N
N: North Latitude, S: South Latitude
Longitude
12148.3416
dddmm.mmmm
dd: degree, mm.mmmm: minute
East/West
W
E: East Longitude, W: West Longitude
Speed over ground
0.13
knots
Receiver’s speed
Course over ground 309.62
degrees Receiver’s direction of travel
Moving clockwise starting at due north
Date
120598
ddmmyy
dd: Day, mm: Month, yy: Year
Magnetic variation
degrees
East/West indicator
This receiver does not support magnetic
declination. All “course over ground” data are
geodetic WGS84 directions.
Mode Indicator
A
A: Autonomous M: Manual
D: DGPS S: Simulation
E: Dead Reckoning N: Data Invalid
checksum
*5F
<CR><LF>
End of sentence
3.7 GPVTG - Course Over Ground and Ground Speed
Example
$GPVTG,309.62,T,,M,0.18,N,0.5,K,A*0F
Explanation
Contents
Example
Unit
Explanation
Message ID
$GPVTG
VTG protocol header
Course over ground
309.62
degrees Receiver’s direction of travel
Moving clockwise starting at due north
(geodetic WGS84 directions)
Reference
T
True
Course over ground
degrees Receiver’s direction of travel
Reference
M
Magnetic
Speed over ground
0.18
knots
Measured horizontal speed
Unit
N
Knots
Speed over ground
0.5
km/hr
Measured horizontal speed
Unit
K
km/hr
Mode Indicator
A
A: Autonomous, D: DGPS, E: DR
checksum
*0F
<CR><LF>
End of sentence
