public HourAngle GetRA(AxisPosition axes)
{
double tempRA_hours = GetHourAngleFromAngle(axes.RAAxis.Value);
double tRa = LocalApparentSiderialTime + tempRA_hours;
double tHa = AstroConvert.RangeHA(tRa);
double dec = GetDec(axes);
// System.Diagnostics.Debug.Write($"{axes.RAAxis.Value}/{axes.DecAxis.Value}\t{dec}\t{tHa}\t{tRa}");
if (Hemisphere == HemisphereOption.Northern)
{
if (axes.DecFlipped)
{
tRa = tRa - 12.0;
// System.Diagnostics.Debug.Write("\t tRa - tRa - 12");
}
}
else
{
System.Diagnostics.Debug.Assert(false, "GetRA is not tested for Southern Hemisphere");
if (axes.DecAxis.Value > 180)
{
tRa = tRa + 12.0;
}
}
return(new HourAngle(AstroConvert.RangeRA(tRa)));
}
public EquatorialCoordinate(HourAngle rightAscension, Angle declination) : this() // , Angle longitude, DateTime observedTime)
{
if (declination > 90.0 || declination < -90.0)
{
throw new ArgumentOutOfRangeException("Declination");
}
_RA.Value = AstroConvert.RangeRA(rightAscension.Value);
_Dec = declination.Value;
}
public void SlewRA(double slewAngle, double expectedRA)
{
MountCoordinate currentPosition = new MountCoordinate(new AxisPosition(0.0, 0.0), _Tools, _Now);
double targetRA = AstroConvert.RangeRA(currentPosition.Equatorial.RightAscension.Value + expectedRA);
double targetDec = currentPosition.Equatorial.Declination.Value;
currentPosition.MoveRADec(new AxisPosition(slewAngle, 0.0), _Tools, _Now);
EquatorialCoordinate expected = new EquatorialCoordinate(targetRA, targetDec);
Assert.AreEqual(expected.RightAscension, currentPosition.Equatorial.RightAscension, 0.000001, "RA test");
Assert.AreEqual(expected.Declination, currentPosition.Equatorial.Declination, 0.000001, "DEc test");
}
private double GetHourAngleFromAngle(Angle raAxisAngle)
{
double hours = HourAngle.DegreesToHours(AstroConvert.Range360Degrees(360.0 - raAxisAngle.Value));
if (Hemisphere == HemisphereOption.Northern)
{
return(AstroConvert.RangeRA(hours + 6.0));
}
else
{
return(AstroConvert.RangeRA((24.0 - hours) + 6.0));
}
}
private Angle GetAngleFromHourAngle(double hourAngle)
{
double ha = 0.0;
double degrees;
if (Hemisphere == HemisphereOption.Northern)
{
ha = AstroConvert.RangeRA(hourAngle - 6.0); // Renormalise from a perpendicular position
degrees = HourAngle.HoursToDegrees(ha);
}
else
{
System.Diagnostics.Debug.Assert(false, "GetAngleFromHours not tested for Southern Hemisphere");
ha = AstroConvert.RangeRA((24 - hourAngle) - 6.0); // Renormalise from a perpendicular position
degrees = HourAngle.HoursToDegrees(ha);
}
return(AstroConvert.Range360Degrees(360.0 - degrees));
}
public void CalculateSlewAngles()
{
MountCoordinate currentPosition = new MountCoordinate(new AxisPosition(0.0, 0.0), _Tools, _Now);
double ha = currentPosition.LocalApparentSiderialTime;
System.Diagnostics.Debug.WriteLine("\nPoint A (SE)");
System.Diagnostics.Debug.WriteLine("============");
AxisPosition targetAxes = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha - 3.0), 10.0, _Tools);
Angle[] deltaAngles = currentPosition.ObservedAxes.GetSlewAnglesTo(targetAxes);
System.Diagnostics.Debug.WriteLine($"Slewing through: {deltaAngles[0]} / {deltaAngles[1]}");
currentPosition.MoveRADec(targetAxes, _Tools, _Now);
currentPosition.DumpDebugInfo();
Assert.AreEqual(PierSide.pierWest, currentPosition.GetPointingSideOfPier(false), "Point A");
System.Diagnostics.Debug.WriteLine("\nPoint B (NW)");
System.Diagnostics.Debug.WriteLine("============");
targetAxes = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha + 9.0), 60.0, _Tools);
deltaAngles = currentPosition.ObservedAxes.GetSlewAnglesTo(targetAxes);
System.Diagnostics.Debug.WriteLine($"Slewing through: {deltaAngles[0]} / {deltaAngles[1]}");
currentPosition.MoveRADec(targetAxes, _Tools, _Now);
currentPosition.DumpDebugInfo();
Assert.AreEqual(PierSide.pierEast, currentPosition.GetPointingSideOfPier(false), "Point B");
System.Diagnostics.Debug.WriteLine("\nPoint C (NE)");
System.Diagnostics.Debug.WriteLine("============");
targetAxes = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha - 9.0), 60.0, _Tools);
deltaAngles = currentPosition.ObservedAxes.GetSlewAnglesTo(targetAxes);
System.Diagnostics.Debug.WriteLine($"Slewing through: {deltaAngles[0]} / {deltaAngles[1]}");
currentPosition.MoveRADec(targetAxes, _Tools, _Now);
currentPosition.DumpDebugInfo();
Assert.AreEqual(PierSide.pierWest, currentPosition.GetPointingSideOfPier(false), "Point C");
System.Diagnostics.Debug.WriteLine("\nPoint D (SW)");
System.Diagnostics.Debug.WriteLine("============");
targetAxes = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha + 3.0), 10.0, _Tools);
deltaAngles = currentPosition.ObservedAxes.GetSlewAnglesTo(targetAxes);
System.Diagnostics.Debug.WriteLine($"Slewing through: {deltaAngles[0]} / {deltaAngles[1]}");
currentPosition.MoveRADec(targetAxes, _Tools, _Now);
currentPosition.DumpDebugInfo();
Assert.AreEqual(PierSide.pierEast, currentPosition.GetPointingSideOfPier(false), "Point D");
}
/// <summary>
/// Gets an Axis position in degrees (0 is at 12-o-clock)
/// </summary>
/// <param name="targetRA">Target RA in hours</param>
/// <param name="targetDec">Target Dec in degrees</param>
/// <param name="futureOffset">Future offset in seconds (if any).</param>
/// <returns></returns>
private Angle GetAxisPositionForRA(double targetRA, double targetDec, double futureOffset = 0.0)
{
double deltaRa = targetRA - LocalApparentSiderialTime + (futureOffset / 3600.0);
if (Hemisphere == HemisphereOption.Northern)
{
if (targetDec > 90.0 && targetDec <= 270.0)
{
deltaRa = deltaRa - 12.0;
}
}
else
{
if (targetDec > 90.0 && targetDec <= 270)
{
deltaRa = deltaRa + 12.0;
}
}
deltaRa = AstroConvert.RangeRA(deltaRa);
return(GetAngleFromHourAngle(deltaRa));
}
public void ASCOM_SOP()
{
MountCoordinate currentPosition = new MountCoordinate(new AxisPosition(0.0, 0.0), _Tools, _Now);
double ha = currentPosition.LocalApparentSiderialTime;
AxisPosition targetAxisPosition = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha - 3.0), 10.0, _Tools);
MountCoordinate targetCoordinate = new MountCoordinate(targetAxisPosition, _Tools, _Now);
// currentPosition.MoveRADec(targetAxisPosition, _Tools, _Now);
Assert.AreEqual(PierSide.pierWest, targetCoordinate.GetPointingSideOfPier(false), "Point A");
targetAxisPosition = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha + 9.0), 60.0, _Tools);
currentPosition.MoveRADec(targetAxisPosition, _Tools, _Now);
Assert.AreEqual(PierSide.pierEast, currentPosition.GetPointingSideOfPier(false), "Point B");
targetAxisPosition = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha - 9.0), 60.0, _Tools);
currentPosition.MoveRADec(targetAxisPosition, _Tools, _Now);
Assert.AreEqual(PierSide.pierWest, currentPosition.GetPointingSideOfPier(false), "Point C");
targetAxisPosition = currentPosition.GetAxisPositionForRADec(AstroConvert.RangeRA(ha + 3.0), 10.0, _Tools);
currentPosition.MoveRADec(targetAxisPosition, _Tools, _Now);
Assert.AreEqual(PierSide.pierEast, currentPosition.GetPointingSideOfPier(false), "Point D");
}
public void TestRangeRA(double value, double expected)
{
Assert.AreEqual(expected, AstroConvert.RangeRA(value));
}
/// <summary>
///
/// </summary>
/// <param name="targetRA"></param>
/// <param name="targetDec"></param>
/// <param name="tools"></param>
/// <param name="futureOffset">Offset in future in seconds (if any)</param>
/// <returns></returns>
public AxisPosition GetAxisPositionForRADec(double targetRA, double targetDec, AscomTools tools, double futureOffset = 0.0)
{
bool flipDEC;
double adjustedRA = targetRA;
double targetHA = AstroConvert.RangeHA(targetRA - LocalApparentSiderialTime + (futureOffset / 3600.0));
if (targetHA < 0) // Target is to the west.
{
if (ForceMeridianFlip)
{
if (Hemisphere == HemisphereOption.Northern)
{
flipDEC = false;
}
else
{
flipDEC = true;
}
adjustedRA = targetRA;
}
else
{
if (Hemisphere == HemisphereOption.Northern)
{
flipDEC = true;
}
else
{
flipDEC = false;
}
adjustedRA = AstroConvert.RangeRA(targetRA - 12);
}
}
else
{
if (ForceMeridianFlip)
{
if (Hemisphere == HemisphereOption.Northern)
{
flipDEC = true;
}
else
{
flipDEC = false;
}
adjustedRA = AstroConvert.RangeRA(targetRA - 12);
}
else
{
if (Hemisphere == HemisphereOption.Northern)
{
flipDEC = false;
}
else
{
flipDEC = true;
}
adjustedRA = targetRA;
}
}
// Compute for Target RA/DEC angles
Angle RAAxis = GetAxisPositionForRA(adjustedRA, 0.0, futureOffset);
Angle DecAxis = GetAxisPositionForDec(targetDec, flipDEC);
// System.Diagnostics.Debug.WriteLine($"RA/Dec:{targetHA}/{targetDec} Axes:{ RAAxis.Value}/{ DecAxis.Value} FlipDec: {flipDEC}");
return(new AxisPosition(RAAxis.Value, DecAxis.Value, flipDEC));
}
