ashtech DG16 - UCT,UDH,CAL: Calculate Local Geoidal Surface

Receiver Commands 167
Receiver Commands
UCT,UDH,CAL: Calculate Local Geoidal Surface
$PASHS,UCT,UDH,CAL
This command computes the estimated parameters for local geoidal surface. In
order to compute the estimated grid transformation parameters, you must have
entered the four data points with the $PASHS,UCT,UDH,APT command.
$PASHQ,UCT,UDH,CAL
This command queries for the estimated parameters of the local geoidal surface.
$PASHQ,UCT,UDH,CAL
The response is in the format
$PASHR,UCT,UDH,CAL,f1,f2,f3,f4,f5,f6 where
Table 6.62 outlines the parameters.
UCT,UDH,EST: Estimating Local Geoidal Surface Transforma-
tion
$PASHS,UCT,UDH,EST
This commands indicates the start of a sequence of entering points for estimating
local geoidal surface transformation parameters.
f5 Sigma ellipsoidal height 0
f6 Sigma orthometric height 0
Table 6.62. $PASHQ,UCT,UDH,CAL Response Parameters
Parameter Description Range
f1 Rotation about x axis (seconds)
f2 Rotation about y axis (seconds)
f3 Vertical shift (meters)
f4 Sigma rotation about x axis 0
f5 Sigma rotation about y axis 0
f6 Sigma vertical shift 0
Table 6.61. $PASHS,UCT,UDH,APT Parameters
Parameter Description Range