Leica GR10 Operational Manual page 137

SBAS -DGPS
Use SBAS for DGPS
Satellite to be preferred
Tracking settings
Cut-off angle
Code smoothing
Message on loss of lock
Test mode must be selected if the desired SBAS system is not yet fully
operational.
It is suggested that the Automatic setting is used. This ensures that the
receiver automatically selects the SBAS system which is valid for the
current position of the receiver.
Description
Activate to use SBAS to gain a DGPS position
When using SBAS corrections for calculating a DGPS position, it is
important to select a satellite in the Satellite to be used list box that
belongs to an SBAS system that is valid within the area of your
reference station.
Use the Satellite to be preferred list box to select a specific SBAS satellite to be
preferred for obtaining a DGPS solution.
If a specific system is selected in the Track sat. syst., select a satellite from that system
in the Satellite to be used list box.
If SBAS is used to calculate a Differential code position solution, SBAS observations are
also written to the LB2 data stream and into all logged MDB and RINEX files. Deactivate
the Use for DGPS list box to calculate a position without using SBAS corrections.
If one or more SBAS satellites are tracked but not used for DGPS, the SBAS
observations are still contained in the LB2 stream as well as in MDB and RINEX files.
If All visible is selected in the Track sat. syst. list box, all visible SBAS
satellites are tracked. Up to 4 SBAS satellites can be tracked at one
time. Since it cannot be predicted which satellites will be tracked with
this setting, DGPS functionality is disabled with this setting, as it cannot
be guaranteed that the satellite for DGPS is tracked when visible.
The assignment of SBAS satellite numbers to certain SBAS systems is
still subject to change. For the current list of PRN assignments go to:
http://www.losangeles.af.mil/library/factsheets/factsheet.asp?id=8618
and select the L1 C/A PRN Code Assignment link.
Description
Enter the elevation cut off angle.
Select Smoothed or Not smoothed.
•
Smoothed: Carrier phase observations are used to smooth the code pseudo-
range in order to reduce multipath and ionospheric bias.
•
Not smoothed: Raw code pseudo-ranges are recorded.
Select the desired behaviour when a loss of lock occurs.
When checked, a message appears in the event log stating that a loss of lock has
occurred.
6: Context sensitive help
135