Hardware
Copyright © 2015 Coda Octopus Products Ltd
50
F180R MOTION Sensor User and Reference Guide
3. Reference Point Altitude:
Which will be the IMU sensing centre or a
remote position depending on how the system
has been configured. The Altitude output will
be to the datum that you have chosen in the
Settings Wizard.
4. Age of Differential GPS data:
Time in seconds since last SC104 Type 1 or 9
update, null field when DGPS is not used. The
system also adds leading digits as required
Also, note that commas separate all items, including null fields.
If no differential corrections are being received, the Age of Differential GPS data and Digital
reference station ID fields are also null.
3.5.2.2.2 GGK
The GGK string is a Trimble proprietary data string that provided time, position, position type,
and DOP. It is considered a "pseudo-NMEA" string, because it looks similar to a standard NMEA
string, but does not quite adhere to the NMEA specification.
Figure 30: NMEA - GGK Format
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