Appendix I: Atmospheric Correction Formula And Chart(Just For Reference) - Pentax W-1502N Series Instruction Manual

Appendix I: Atmospheric correction formula and
chart(Just for reference)
Factory setting:
The correction:
Kpt＝274.417-0.2905*p/(1＋0.0036*t)
Where: p--Pressure value (hPa)
t--Temperature value (℃)
Kpt--Atmospheric correction (ppm)
Example:
t=20℃, p=1013hpa, L0=1000m.
Then: Kpt=0ppm
L=L 0 (1+Kpt)=1000×(1+0×10 -6 )=1000.000m
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.
temperature: 20℃, pressure:1013hpa, 0ppm
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