private double CalculateSiderealTime()
{
double siderealTime = double.NaN;
// Now using NOVAS 3.1
using (var novas = new ASCOM.Astrometry.NOVAS.NOVAS31())
{
var jd = utilities.DateUTCToJulian(DateTime.UtcNow);
novas.SiderealTime(jd, 0, novas.DeltaT(jd),
ASCOM.Astrometry.GstType.GreenwichApparentSiderealTime,
ASCOM.Astrometry.Method.EquinoxBased,
ASCOM.Astrometry.Accuracy.Reduced, ref siderealTime);
}
// Allow for the longitude
siderealTime += SiteLongitude / 360.0 * 24.0;
// Reduce to the range 0 to 24 hours
siderealTime = astroUtilities.ConditionRA(siderealTime);
return(siderealTime);
}
