class SolCal::Commands::AngleToZenithAtTimeCommand

Protected Instance Methods

do_execute() click to toggle source
# File lib/solcal/commands/angle_to_zenith_at_time_command.rb, line 5
def do_execute
        ha_angle_at_time = Angle.from_deg((solar_noon - at_time)*1440/4)
        d = Math.cos(ha_angle_at_time.to_rad)
        b = Math.cos(latitude.to_rad)*Math.cos(declination.to_rad)
        c = Math.tan(latitude.to_rad)*Math.tan(declination.to_rad)
        a = (d+c)*b
        Angle.from_rad(Math.acos(a))                        
end