Solar culmination and equation of time Calculator

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Calculates a table of changes in the solar culmination and equation of time for a year and draws the chart.

Input negative degree for west longtitude.
Daylight Saving time is not taken into consideration.
Solar culmination and equation of time
Year
    2. ,
    4. [ Calculation interval
    6. ]
Longitude
    2. ,
    4. Time zone
    6. h
    7. (9:Japan)
・The factors which equation of time produces are the Earth's orbital eccentricity and axial tilt.
・equation of time ＝ mean solar time − apparent solar time
　　　　 ＝(time zone - longitude/15)＋12h− solar culmination
・If the longitude of the standard time is specified, the mean solar time will become noon.

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