/// <summary>
/// Conversion of mount axis positions in degrees to Ra and Dec
/// </summary>
/// <param name="axes"></param>
/// <returns></returns>
internal static double[] AxesXYToRaDec(double[] axes)
{
var raDec = new[] { axes[0], axes[1] };
switch (SkySettings.AlignmentMode)
{
case AlignmentModes.algAltAz:
var radec = Coordinate.AltAz2RaDec(SkyServer.Altitude, SkyServer.Azimuth, SkySettings.Latitude, SkyServer.SiderealTime);
raDec[0] = Coordinate.Ra2Ha12(radec[0], SkyServer.SiderealTime) * 15.0; // ha in degrees
raDec[1] = radec[1];
break;
case AlignmentModes.algGermanPolar:
case AlignmentModes.algPolar:
if (raDec[1] > 90)
{
raDec[0] += 180.0;
raDec[1] = 180 - raDec[1];
raDec = Range.RangeAzAlt(raDec);
}
raDec[0] = SkyServer.SiderealTime - raDec[0] / 15.0;
//southern hemi
if (SkyServer.SouthernHemisphere)
{
raDec[1] = -raDec[1];
}
break;
default:
throw new ArgumentOutOfRangeException();
}
raDec = Range.RangeRaDec(raDec);
return(raDec);
}
/// <summary>
/// convert a decimal Alt/Az positions to an axes positions.
/// </summary>
/// <param name="altAz"></param>
/// <returns></returns>
internal static double[] AltAzToAxesYX(double[] altAz)
{
var axes = new[] { altAz[0], altAz[1] };
double lst;
switch (SkySettings.AlignmentMode)
{
case AlignmentModes.algAltAz:
break;
case AlignmentModes.algGermanPolar:
lst = SkyServer.SiderealTime;
axes = Coordinate.AltAz2RaDec(axes[0], axes[1], SkySettings.Latitude, lst);
axes[0] = Coordinate.Ra2Ha12(axes[0], lst) * 15.0; // ha in degrees
if (SkyServer.SouthernHemisphere)
{
axes[1] = -axes[1];
}
axes = Range.RangeAzAlt(axes);
if (axes[0] > 180.0 || axes[0] < 0)
{
// adjust the targets to be through the pole
axes[0] += 180;
axes[1] = 180 - axes[1];
}
break;
case AlignmentModes.algPolar:
lst = SkyServer.SiderealTime;
axes = Coordinate.AltAz2RaDec(axes[0], axes[1], SkySettings.Latitude, lst);
axes[0] = Coordinate.Ra2Ha12(axes[0], lst) * 15.0; // ha in degrees
if (SkyServer.SouthernHemisphere)
{
axes[1] = -axes[1];
}
axes = Range.RangeAzAlt(axes);
break;
default:
throw new ArgumentOutOfRangeException();
}
axes = Range.RangeAxesXY(axes);
var monitorItem = new MonitorEntry
{
Datetime = HiResDateTime.UtcNow, Device = MonitorDevice.Telescope, Category = MonitorCategory.Server, Type = MonitorType.Information, Method = MethodBase.GetCurrentMethod().Name, Thread = Thread.CurrentThread.ManagedThreadId, Message = $"Range:{axes[0]},{axes[1]}"
};
MonitorLog.LogToMonitor(monitorItem);
return(new[] { axes[1], axes[0] });
}