User manual

Technical Data TPS1200 207
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
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
TPS12_052
ΔD
1
= 285.93 -
0.29493 · p
· 10
x
4.126 · 10
-4
· h
-
TPS12_229
ΔD
1
= 286.269 -
0.29528 · p
· 10
x
4.126 · 10
-4
· h
-
1
273.15