Type

Index n

carrier wave [nm]

visible red laser

1.0002859

670

 

 

 

The index n is calculated from the formula of Barrel and Sears, and is valid for:

Air pressure p:

1013.25 mbar

Air temperature t:

12 °C

Relative air humidity h:

60 %

Formulas

Formula for infrared EDM

 

 

 

ΔD

= 283.05 -

 

 

0.29196 · p

-

4.126 · 10-4· h

· 10x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TPS12_051

 

 

 

 

 

 

 

Formula for visible red laser

 

 

 

ΔD

= 285.93 -

 

 

0.29493 · p

-

4.126 · 10-4· h

· 10x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TPS12_052

 

 

 

 

 

 

ΔD1 Atmospheric correction [ppm]

pAir pressure [mbar]

t Air temperature [°C] h Relative humidity [%]

α1

273.15

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.

Technical Data

TPS1200

207

Page 207
Image 207
Leica user manual Type Index n Carrier wave nm Visible red laser 0002859 670, Formulas, Technical Data TPS1200 207