static public double NowLST(LatLon location)
{
var nov = new ASCOM.Astrometry.NOVAS.NOVAS31();
var ast = new ASCOM.Astrometry.AstroUtils.AstroUtils();
var currJD = ast.JulianDateUT1(0);
double lstNow = 0;
var res = nov.SiderealTime(
currJD, 0d, 0, GstType.GreenwichApparentSiderealTime, Method.EquinoxBased, Accuracy.Full, ref lstNow);
if (res != 0)
{
throw new Exception("Error getting Local Apparent Sidereal time");
}
return(lstNow);
}
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);
}
/// <summary>
/// Calculates Greenwich Mean Sidereal time
/// </summary>
/// <returns>HourDouble format</returns>
static public double NowLMST()
{
var nov = new ASCOM.Astrometry.NOVAS.NOVAS31();
var ast = new ASCOM.Astrometry.AstroUtils.AstroUtils();
var currJD = ast.JulianDateUT1(0);
double gstNow = 0;
var res = nov.SiderealTime(
currJD, 0d, 0, GstType.GreenwichMeanSiderealTime, Method.EquinoxBased, Accuracy.Full, ref gstNow);
if (res != 0)
{
throw new InvalidValueException("Error getting Greenwich Mean Sidereal time");
}
double lstNow = gstNow + Longitude / 15;
lstNow = lstNow - (lstNow >= 24 ? 24 : 0);
return(lstNow);
}
public static double NowLST(LatLon location)
{
var nov = new ASCOM.Astrometry.NOVAS.NOVAS31();
var ast = new ASCOM.Astrometry.AstroUtils.AstroUtils();
var currJD = ast.JulianDateUT1(0);
double lstNow = 0;
var res = nov.SiderealTime(
currJD, 0d, 0, GstType.GreenwichApparentSiderealTime, Method.EquinoxBased, Accuracy.Full, ref lstNow);
if (res != 0) throw new Exception("Error getting Local Apparent Sidereal time");
return lstNow;
}
