/// <summary>
/// Obtains a vector in polar notation from the equatorial coordinates and the observation time.
/// </summary>
/// <param name="coord"></param>
/// <param name="time"></param>
/// <returns></returns>
private Vector GetEVC(EquatorialCoordinate coord, double localSiderealTime)
{
double deltaTime = AstroConvert.HrsToRad((localSiderealTime - _timeZero));
Vector evc = new Vector(0.0, 0.0, 0.0);
evc[0] = Math.Cos(coord.Declination.Radians) * Math.Cos(coord.RightAscension.Radians - (_k * deltaTime));
evc[1] = Math.Cos(coord.Declination.Radians) * Math.Sin(coord.RightAscension.Radians - (_k * deltaTime));
evc[2] = Math.Sin(coord.Declination.Radians);
return(evc);
}
public EquatorialCoordinate GetEquatorialCoords(AxisPosition axes, double localSiderealTime)
{
Vector EVC = new Vector(0.0, 0.0, 0.0);
Vector HVC = GetHVC(axes);
double deltaTime = AstroConvert.HrsToRad((localSiderealTime - _timeZero));
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
EVC[i] += _iT[i, j] * HVC[j];
}
}
return(new EquatorialCoordinate(Math.Atan2(EVC[1], EVC[0]) + (_k * deltaTime), Math.Asin(EVC[2])));
}
