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Technical Data
Formulas
D
1
Atmospheric correction [ppm]
p
Air pressure [mbar]
t
Air temperature [°C]
h
Relative humidity [%]
x
(7.5 * t/(237.3 + t)) + 0.7857
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.
Formula for visible red laser
TS_105
Δ
D
1
= 286.34 -
0.29525 · p
· 10
x
4.126 · 10
-4
· h
-
1
273.15