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Appendix I: Atmospheric correction formula and chart
(Just for reference)
Factory setting: temperature: 20 , pressure:1013hPa, 0ppm
℃
The correction:
Kpt
＝
274.417-0.2905*p/(1
＋
0.0036*t)………………..RTS
Kpt
＝
278.960-0.2902*p/(1
＋
0.0036*t)………………...OTS
Where: p--Pressure value (hPa)
t--Temperature value ( )
℃
Kpt--Atmospheric correction (ppm)
Example:
t=20 , p=1013hpa, L0=1000m.
℃
Then: Kpt=0ppm (RTS)
Kpt=4ppm (OTS)
L=L0(1+Kpt)=1000×(1+0×10-6)=1000.000m (RTS)
L=L0(1+Kpt)=1000×(1+4×10-6)=1000.004m (OTS)
The atmospheric value is obtained easily with the atmospheric correction chart.
Find the measured temperature in horizontal axis, and pressure in vertical axis
on the chart.
Read the value from the diagonal line, which is the required atmospheric
correction value.
For RTS series
