Specifications

VP ONCORE COMMAND REFERENCE
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3-D TO 2-D xDOP THRESHOLD (@@Al)
There may be periods during the day where the 3-dimensional (3-D)
dilution of precision (PDOP and GDOP) grows very large, but the 2-D
HDOP stays relatively small. This command allows the user to set the
DOP threshold above which the GPS receiver will switch from 3-D
positioning to altitude-hold at the current height. This allows the GPS
receiver to maintain a relatively accurate position fix, and avoids the
condition of a 3-D fix algorithm singularity
Range: 1.0 to 99.9
Default value: 6.0
Resolution: 0.1
Note: On later Oncore receivers such as the GT+, UT+,
and M12, the xDOP Threshold is fixed at 6.0
39 Synergy Systems, LLC 05OCT01