power when suspended. You might want to restart the GNSS receiver after changing
settings.
GPS INTERMEDIATE DRIVER
The GPS Intermediate Driver (GPSID) is used to allow more than one program to use data from the
GPS receiver. The GNSS control panel controls how the GPSID is used. The GPSID can output data
on another COM port in a way that allows multiple programs to access the same COM port. This is
called the GNSS program port and defaults to COM2. This can be set up on the Programs screen of
the GNSS control panel.
Internal GPS is on COM8 and communicates at 115200 baud. These settings are found on the
Hardware screen of the GPS Settings control panel. If another GPS receiver is to be used, this is
where you connect that GPS receiver so that the GPSID can access it.
The camera, GPS function and JSNav application use the GPSID to obtain GPS information. Turning
off the GPSID through the GPS hardware port disables these functions.
Note: If an application accesses the GPS module directly on COM8, the GPSID will not have
access to the GPS, preventing camera geotagging and GPS from functioning.
Note: SurvCE accesses the GPS/GNSS module directly on the Surveyor2 and provides limited
functionality when using the GPS Intermediate Driver.
NMEA SENTENCES
Descriptions of the NMEA Sentences shown on the GNSS control panel menu follow.
RMC - Recommended Minimum Specific GNSS Data. Example of data output:
$GPRMC,045824.00,A,4127.31350,N,11202.79015,W,00.03,022.9,160914,,,A*4C.
The RMC message contains the time, date, position, course and speed data provided by
the GNSS navigation receiver.
VTG - Course over Ground & Ground Speed. The VTG message provides actual course (CoG)
and speed (SoG) relative to the ground.
GGA – Global Positioning System Fix Data. The GGA message outputs time, position and
fix related data. The fix is based on all available GNSS. This message is similar to the GNS –
GNSS Fix Data GNS message.
GSA – GNSS DOP and Active Satellites. The GSA message contains the GNSS receiver’s
operating mode, satellites used for calculation of the PVT data transmitted by the GGA
message and DOP values. The GPS satellites are identified by their PRN, which range from
1 to 32. The WAAS system has numbers 33 to 64 to identify its satellites. The numbers 65
to 95 are used for GLONASS satellites (64 + satellite slot number).
GSV – GNSS Satellites In View. The GSV message identifies the number of satellites (SV) in
view, satellites’ PRN numbers, elevation, azimuth and SNR value. One GSV message may
contain data for one to four satellites. If more than 4 satellites are in view then additional
To Next Page
Loading...
Need help?
General
