private static double GetHourHorizon(
this CelestialObjectPositionModel celestialObjectPosition,
double latitudeDegrees,
double h0)
{
if (h0.EqualsWithinTolerance(0, 6))
{
return(DegreeHelper.RadiansToDegrees(
Math.Acos(
-MathDegrees.Tan(latitudeDegrees) *
MathDegrees.Tan(celestialObjectPosition.Declination))));
}
return(DegreeHelper.RadiansToDegrees(Math.Acos(
(MathDegrees.Sin(h0) - (MathDegrees.Sin(latitudeDegrees) * MathDegrees.Sin(celestialObjectPosition.Declination))) /
(MathDegrees.Cos(latitudeDegrees) * MathDegrees.Cos(celestialObjectPosition.Declination)))));
}
internal static SkyPositionModel GetSkyPosition(
double declination,
double latitude,
DateTimeOffset dateTimeOffset,
double siderealTime)
{
var azimuth =
DegreeHelper.RadiansToDegrees(
Math.Atan2(
MathDegrees.Sin(siderealTime),
(MathDegrees.Cos(siderealTime) * MathDegrees.Sin(latitude)) - (MathDegrees.Tan(declination) * MathDegrees.Cos(latitude))));
var height =
DegreeHelper.RadiansToDegrees(
Math.Asin(
(MathDegrees.Sin(latitude) * MathDegrees.Sin(declination)) +
(MathDegrees.Cos(latitude) * MathDegrees.Cos(declination) * MathDegrees.Cos(siderealTime))));
return(new SkyPositionModel(dateTimeOffset, height, azimuth));
}