ashtech DG14, Reference Manual

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166 DG14 and DG16 Board & Sensor Reference Manual
UCT,UDD,EST: Estimating a 3-D Datum Transformation
$PASHS,UCT,UDD,EST,f1,f2
This commands indicates the start of a sequence of entering points for estimating
3D datum transformation parameters. Table 6.60 outlines the parameters.
UCT,UDH,APT: Add Point for Local Geoidal Surface Transfor-
mation
$PASHS,UCT,UDH,APT,f1,f2,f3,f4,f5,f6
This commands adds a point for the estimation of local geoidal surface
transformation parameters where Table 6.61 outlines the parameters. You must
enter this command for each of the three required data points to compute the 3-D
datum transformation parameters.
f14 Sigma longitude of local datum 0
f15 Sigma altitude of local datum 0
Table 6.60. $PASHS,UCT,UDD,EST Parameters
Parameter Description Range
f1 Semi-major axis of local
datum 6300000 to 6400000
f2 Inverse flattening of local
datum 290 to 310
Table 6.61. $PASHS,UCT,UDH,APT Parameters
Parameter Description Range
f1 Easting based on user selected grid system
(meters) ±9999999.99
f2 Northing based on user selected grid system
(meters) ±9999999.99
f3 Ellipsoidal height 0 to 18000
f4 Orthometric height 0 to 18000
Table 6.59. $PASHS,UTC,UDD,CAL Parameters
Parameter Description Range