Calculation of Atmospheric Refraction.

Keyword

Apparent Altitude,True altitude,Refraction Index of light,Air,Temperature,Atmospheric Pressure,Water Vapor Pressure,Observation wavelength of light,scale height of atmosphere.

Reference

・『理科年表平成20年2008』(国立天文台編).

Remarks

・R0=(n-1)*(1-H).
・R1=1/2*(n-1)^2-(n-1)*H.
・H≈0.0013. It is a scale height of atmosphere by reference to Earth radius.
・Atmospheric Refraction(R)=R0*tan(90-Apparent Altitude)+R1*(tan(90-Apparent Altitude))^3.

History

・2014/08/19:layout change.
・2009/03/30:Moved from www.am-consulting.co.jp to here.