均時差と赤緯

PDF Document:Equation of Time and Solar Declination
DateFile NameSize(KB)MD5 Hash
2011/12/2920111229-001.pdf4356c978a485a961f465e14c44d271a7d68

Keyword

Equation of Time and Solar Declination

Reference

[1]:有害紫外線モニタリングネットワーク事務局編:『有害紫外線モニタリングネットワーク活動報告 CGER-M017-2005』,pp9-13,2005

Remarks

・θ0=2*π*Number of days elapsed/365(or 366)
・Solar Declination(δ) Approximation Formula:δ(rad)=0.006918-0.399912*cos(θ0)+0.070257*sin(θ0)-0.006758*cos(2*θ0)+0.000907*sin(2*θ0)-0.002697*cos(3*θ0)+0.001480*sin(3*θ0).
・Equation of Time(Eq) Approximation Formula:Eq(min)=60*12*{0.000075+0.001868*cos(θ0)-0.032077*sin(θ0)-0.014615*cos(2*θ0)-0.040849*sin(2*θ0)}/π.
・Solar Elevation(α) Formula:α=arcsin{sin(φ)*sin(δ)+cos(φ)*cos(δ)*cos(h)}.
・Solar azimuth(β) Formula:β=arctan[cos(φ)*cos(δ)*sin(h)/{sin(φ)*sin(α)-sin(δ)}]