ashtech DG14, Reference Manual

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Receiver Commands 165
Receiver Commands
UCT,UDD,CAL: Calculate Datum Transformation Parameters
$PASHS,UCT,UDD,CAL
This command computes the estimated datum transformation parameters for the
user-defined datum. In order to compute the estimated datum transformation
parameters, you must have entered in at least seven data points with the
$PASHS,UCT,UDD,APT command.
$PASHQ,UCT,UDD,CAL
This command queries for the estimated datum transformation parameters of the
user-defined datum.
$PASHR,UCT,UDD,CAL,f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12,f13,f14,f
15
The response is in the format:
$PASHR,UCT,UDD,CAL,f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12,f13,f
14,f15
Table 6.59 outlines the parameters.
Table 6.59. $PASHS,UTC,UDD,CAL Parameters
Parameter Description Range
f1 Semi-major axis of local datum (meters) 6300000 to 6400000
f2 Inverse flattening of local datum (meters) 290 to 310
f3 X shift origin of coordinates of ellipsoid (meters) ±1000.000
f4 Y shift origin of coordinates of ellipsoid (meters) ±1000.000
f5 Z shift origin of coordinates of ellipsoid (meters) ±1000.000
f6 Rotation in x axis (seconds)
+ rotation is counter clockwise
- rotation is clockwise rotation ±10.000
f7 Rotation in y axis (seconds) ±10.000
f8 Rotation in z axis (seconds) ±10.000
f9 Delta Scale factor (scale factor - 1.0). (ppm) ±25.000
f10 Sigma latitude of WGS-84 point 0
f11 Sigma longitude of WGS-84 point 0
f12 Sigma altitude of WGS-84 point 0
f13 Sigma latitude of local datum 0