/// <summary>
/// Compute sun's mean longitude for given J2000 epoch days and fraction.
/// </summary>
private static double ComputeSunMeanLongitude(double epochDaysFraction)
{
return(AngleMath.FixDegreesAngle(280.459 + (0.98564736 * epochDaysFraction)));
}
/// <summary>
/// Compute sun's ecliptic longitude for given mean longitude and mean anomaly.
/// </summary>
private static double ComputeSunEclipticLongitude(double sunMeanLongitude, double sunMeanAnomaly)
{
return(AngleMath.FixDegreesAngle(sunMeanLongitude +
(1.915 * AngleMath.SineOfDegree(sunMeanAnomaly)) +
(0.02 * AngleMath.SineOfDegree(2.0 * sunMeanAnomaly))));
}
/// <summary>
/// Compute sun's mean anomaly for given J2000 epoch days and fraction.
/// </summary>
private static double ComputeSunMeanAnomaly(double epochDaysFraction)
{
return(AngleMath.FixDegreesAngle(357.529 + (0.98560028 * epochDaysFraction)));
}