ashtech GG Surveyor, Reference Manual

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Command/Response Formats 93
Com
m
and
s
where the fields are as described in Table 6.17
Default values are:
f1 = 0.0 f2 = +2.5 f3 = 0.0
f4 = 0.0 f5 = –0.3919 = –1.9
Z
10
-6
radians f6 = 0.0
f7 = 0
The transformation evaluates the following matrix equation:
$PASHQ,MRX,c
The accompanying query command has the structure, where c is the optional output
port.
$PASHQ,MRX
$PASHR,MRX
The transformation matrix response message is in the format
$PASHR,MRX,f1,f2,f3,f4,f5,f6,f7
where the fields are as described in Table 6.17
MSV: Set Minimum Satellites
$PASHS,MSV,x
Set the minimum number of satellites required for MBN or MCA messages to be
output, where x is a number between 1 and 9. Default is 3.
Table 6.17: MRX (PZ-90 to WGS-84) Structure
Field Description
f1,f2,f3 Translation in meters from PZ-90 to WGS-84.
Range -1000.000 to +1000.000.
f4,f5,f6 Datum rotations in seconds of arc from PZ-90 to WGS-84.
Range -10.0000 to +10.0000. + rotation is counterclockwise,
- rotation is clockwise as viewed from the positive end of the axis
about which the rotation takes place.
f7 Datum scale factor in ppm from PZ-90 to WGS-84. Range -10.00 to
+10.00.
x
y
z
WGS 84 –
0.0
2.5
0.0
1
(
0 10
6 –
× )
1.0 1.9
6 –
×
10 – 0.0
1.9
6 –
×
10 1.0 0.0
0.0 0.0 1.0
x
y
z
PZ 90 –
+ + =