LEICA TPS1200 - Manual (Page 207)

Technical Data TPS1200 207
The index n is calculated from the formula of Barrel and Sears, and is valid for:
Formulas
If the basic value of 60 % relative humidity as used by the EDM is retained, the
maximum possible error in the calculated atmospheric correction is 2 ppm,
2 mm/km.
visible red laser 1.0002859 670
Air pressure p: 1013.25 mbar
Air temperature t: 12 °C
Relative air humidity h: 60 %
Type Index n carrier wave [nm]
Formula for infrared EDM
ΔD
1
Atmospheric correction [ppm]
p Air pressure [mbar]
t Air temperature [°C]
h Relative humidity [%]
α
x (7.5 * t/(237.3 + t)) + 0.7857
Formula for visible red laser
1
273.15
TPS12_051
ΔD
1
= 283.05 -
0.29196 · p
· 10
x
4.126 · 10
-4
· h
-
TPS12_052
ΔD
1
= 285.93 -
0.29493 · p
· 10
x
4.126 · 10
-4
· h
-