Spectra Precision Focus 6 - Coordinate

5 Menu Key
130 Spectra Precision Focus 6 5" Total Station User Guide
surrounding the earth decreases with altitude, light is refracted at different rates at
different altitudes. The error caused by this change in refraction is called refraction
error.
Coordinate
To open the Coordinate menu, press [3] or select
Coord. in the Settings menu.
B
Tip – The Order and AZ job settings cannot be changed once a job is created.
HD Horizontal dist. (before adj.)
HD’ Horizontal dist. (after adj.)
VD Vertical dist. (before adj.)
VD' Vertical dist. (after adj.)
SD Slope distance
VA Vertical angle
Re 6370 km
k C&R constant (0.132 or 0.200)
Order NEZ/ENZ
Label XYZ/YXZ/NEZ(ENZ)
AZ
North/South
Curvature error (A A') Refraction error (A A1')
P
A'
Horizontal
direction
A
O
P
A1
'
A1
A
'
HD' HD
SD
2
2VA()sin
2R
e
----------------------------------- 1
k
2
---


=
VD' VD
HD
2
2R
e
-----------1 k()+=