Spectra Precision FAST Survey - Manual (Page 34)

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• Use GPS: Enables/disables the use of the GPS
constellation (enabled by default).
• Source Datum: If GPS is used, this is a read-only field
providing the name of the datum (i.e. “W84”) on which
position solutions are computed. If GLONASS is used and
GPS is not used, you have the choice of which datum to
use: either “W84” (GPS datum) or “PZ90.02” (GLONASS
datum).
• Virtual Antenna: This option is disabled by default.
Enabling the virtual antenna, which is defined as the
generic “ADVNULLANTENNA” GNSS antenna, allows all
collected data to be decorrelated from the GNSS antenna
actually used at signal reception level. This may be useful
if you wish to post-process the collected raw data using
base raw data collected with a base from another
manufacturer.
• Use RTK Datum (RTCM 3.1): Enable this option if you want
the rover to compute position solutions on the same
datum as the one used by the base (this function will be
effective only if the rover receives RTCM 3.1 messages
1021 and 1023 from the base).
• Use RTK XYZ Position (RTCM 3.1): Enable this option if you
want the rover to compute position solutions in the same
coordinate system as the one used by the base (this
function will be effective only if the rover receives RTCM
3.1 message 1025 from the base). Enabling this option
makes sense only if
Use RTK Datum (RTCM 3.1) is also
enabled.
RTK Tab
Use this tab to define:
1. The type of device (“ Device”) the GNSS receiver will use
to acquire corrections.
2. Possibly the network (“ Network”) the rover will connect to
to acquire corrections.
3. Whether the rover is expected to return its current position
before corrections can be sent back to it.