27
/
49
Command
LOG COM2 CMRPLUS ONTIME 1
Function
BASE Station Satellite Observation Information
3.1.5
GPGGA
This log contains time, position and fixes related data of the GNSS receiver. The
GPGGA log outputs these messages without waiting for a valid almanac.
Table 37 Sets the RTK correction source
Name
Value
Input
log gpgga ontime 1
Example
$GNGGA,030405.60,3111.42512346,N,12135.59044629,E,1,24,0
.6,28.2297,M,11.5902,M,00,0000*4A
Function
Log positioning solution and status in NMEA format
Parameter description
Message
gpgga/gpgsa/gpgsv/gpvtg/gprmc
Interval
1 or above (below 1 will be supported later)
The NMEA (National Marine Electronics Association) has defined standards that
specify how electronic equipment for marine users communicates. GNSS receivers
are part of this standard and the NMEA has defined the format for several GNSS data
logs otherwise known as 'sentences'. Each NMEA sentence begins with a '$' followed
by the prefix 'GL' or ‘GN’ followed by a sequence of letters that define the type of
information contained in the sentence. Data contained within the sentence is separated
by commas and the sentence is terminated with a two digit checksum followed by a
carriage return/line feed. Here is an example of a NMEA sentence describing time,
position and fix related data.
$GNGGA,032845.00,3111.4246954,N,12135.5908737,E,1,27,1.0,26.120,M,11.518,
M,,*48.
The GPGGA sentence shown above and other NMEA logs are output the same no
matter what GNSS receiver is used, providing a standard way to communicate and
process GNSS information.
3.1.6
GPGLL
This log contains latitude and longitude of present vessel position, time of position fix
and status.
Table 38 GPGLL
