Airlink EDGE/GPRS User Manual
Page 143
PinPoint-E EDGE/GPRS - User Guide, version 2.32
137
GPS Message Format Streams
Example taken from PinPoint-E output:
$GPRMC,173219.428,A,3505.1436,N,08037.5669,W,0.09,13.55,040403,,,*2B
Example taken from PinPoint-E output:
$GPVTG, 308.49,T,,M,0.05,N,0.1,K,*62
Units of geoidal separation, meters
M
(not applicable to the PinPoint-E)
null field
Differential reference station ID, 0000-1023
0000
Optional checksum field consisting of "*" and
two hex digits.
Represents the exclusive OR of all characters
between, but not including, the "$" and "*".
*1E
TABLE 2.
RMC - Recommended Minimum Navigation Information
Description
Field Contents
Global Positioning System (GPS)
GP
Recommended Minimum sentence C Phase
RMC
UTC (Fix taken at 17:32:19 UTC)
173219.428
Status A=Active or V=Void
(A status of V indicated the GPS has a fix that is
below an internal quality threshold, i.e. dilution
of precision is too high or an elevation mask test
failed)
A
Latitude
3505.1435
North or South
N
Longitude
08037.5669
East or West
W
Speed over ground, knots
0.09
Track angle in degrees True
13.55
Date (04th of April 2005)
040405
Magnetic Variation, degrees
null field
East or West
null field
Checksum
*2E
TABLE 3.
VTG - Vector track and Speed over the Ground
Description
Field Contents
Global Positioning System (GPS)
GP
Track made good and Ground speed
VTG
TABLE 1.
GGA - Global Positioning System Fix Data
Description Field
Contents