ashtech DG16 - Page 197

Receiver Commands 177
Receiver Commands
Examples
Enter the following command to set datum to grid transformation parameters for
Lambert Conformal CA-zone 4:
$PASHS,UDG,LC83,6,360000.0,371500.0,-1190000.0,352000.0,
2000000,500000
Enter the following command to set datum to grid transformation parameters:
$PASHS,UDG,LC83,637 8240,297.323,121.4,18.9,0,0,0,1.5
f4 Longitude of Central meridian T2
f5 Degree, minute portion of the rectifying latitude
wo for Fo, latitude of origin
T3
f6 Remainder of woT4
f7 Scale along central meridian T5
f8
(1/6 * Rm * Nm * T5
2
) * 10
15
Rm = radius of curvature in meridian plane
Nm = radius of curvature in prime vertical
Both are calculated for the mean latitude of the
area in the zone.
T6
Table 6.75. UDG Structure for Transverse Mercator for SPC27 for Alaska
Zones 2 through 9
Parameters Description Range / Name
s1 Map projection type TMA7
d2 Number of parameters for the selected
projection
2
f3 False Easting or x coordinate of central
meridian
C
f4 Longitude of Central meridian CM
Table 6.74. UDG Structure for Transverse Mercator for SPC27
Field Description Range / Name