Spectra Precision Focus 6 User Manual

Spectra Precision Focus 6 5" Total Station User Guide 129
Menu Key 5
Temperature and Pressure corrections
Sea Level correction
Curvature and Refraction correction
Because the surface of the earth is curved, the vertical difference (VD and Z) at the
measurement point, as referenced to the horizontal plane, inevitably includes some
error. This error is called curvature error. Also, because the density of the air
SD Slope dist. (before adj.)
SD' Slope dist. (after adj.)
K Compensation coefficient
P Pressure (hPa)
T Temperature (°C)
HD Horizontal dist. (before adj.)
HD' Horizontal dist. (after adj.)
Z
STN
Instrument-Z
R
e
6370 km
K 275
106 P
10000.0
13.5951 980.665×
---------------------------------------------


××
273 T+
---------------------------------------------------------------------------–=
SD' 1
K
1000000
---------------------+


SD×=
HD'
HD R
e
×
R
e
Z
STN
+
------------------------=

Spectra Precision Focus 6 Specifications

General

Brand	Spectra Precision
Model	Focus 6
Category	Measuring Instruments
Language	English