public List <string> QueryWhyNot(string RA_Dec, double ArcSecLook)
{
ArcSecLook *= Math.PI / 180 / 3600;
EquatorialPoint eqp = Umbrella2.Pipeline.ExtraIO.EquatorialPointStringFormatter.ParseFromMPCString(RA_Dec);
List <string> r = new List <string>();
foreach (var kvp in RemovalPoints)
{
if ((kvp.Key ^ eqp) < ArcSecLook)
{
r.Add(kvp.Value);
}
}
if (r.Count == 0)
{
foreach (var d in AllDetections)
{
if ((d.Barycenter ^ eqp) < ArcSecLook)
{
r.Add("Post-filtering (recovery)");
}
}
}
return(r);
}
/// <summary>
/// Preloads stars into the search structures.
/// </summary>
/// <param name="Detections">Stars.</param>
public void LoadStars(List <Star> Detections)
{
if (DetectionPool != null)
{
throw new NotSupportedException("Cannot modify the detection pool after it is generated");
}
PoolList.AddRange(Detections);
foreach (Star md in Detections)
{
EquatorialPoint ep = md.EqCenter;
if (ep.Dec < Topmost)
{
Topmost = ep.Dec;
}
if (ep.Dec > Lowermost)
{
Lowermost = ep.Dec;
}
if (ep.RA < Leftmost)
{
Leftmost = ep.RA;
}
if (ep.RA > Rightmost)
{
Rightmost = ep.RA;
}
if (md.PixRadius > MaxRadius)
{
MaxRadius = md.PixRadius;
}
}
}
/// <summary>
/// Preloads detections into the search structures.
/// </summary>
/// <param name="Detections">Detected sources.</param>
public void LoadDetections(List <ImageDetection> Detections)
{
if (DetectionPool != null)
{
throw new NotSupportedException("Cannot modify the detection pool after it is generated");
}
PoolList.AddRange(Detections);
foreach (ImageDetection md in Detections)
{
EquatorialPoint ep = md.Barycenter.EP;
if (ep.Dec < Topmost)
{
Topmost = ep.Dec;
}
if (ep.Dec > Lowermost)
{
Lowermost = ep.Dec;
}
if (ep.RA < Leftmost)
{
Leftmost = ep.RA;
}
if (ep.RA > Rightmost)
{
Rightmost = ep.RA;
}
}
}
/// <summary>
/// Removes fixed stars from a list of detections.
/// </summary>
/// <returns>Reduced detections.</returns>
/// <param name="Input">Raw detections.</param>
public List <ImageDetection> Reduce(List <ImageDetection> Input)
{
List <ImageDetection> N = new List <ImageDetection>();
double PR = PairingRadius * Math.PI / 180 / 3600;
foreach (ImageDetection imd in Input)
{
EquatorialPoint p = imd.Barycenter.EP;
double XPR = PR + MaxRadius * imd.ParentImage.Transform.GetEstimatedWCSChainDerivative();
var P = DetectionPool.Query(p.RA, p.Dec, XPR);
List <Star> spP = new List <Star>();
foreach (Star s in P)
{
double SR = s.PixRadius * imd.ParentImage.Transform.GetEstimatedWCSChainDerivative();
if (SR + PR > (s.EqCenter ^ p))
{
spP.Add(s);
}
}
if (spP.Count == 0)
{
N.Add(imd);
}
}
return(N);
}
/// <summary>
/// Formats point to string.
/// </summary>
/// <param name="Point">Point to apply to.</param>
/// <param name="OutputFormat">String output format.</param>
/// <returns>A formatted string containing the coordinates of the input point.</returns>
public static string FormatToString(this EquatorialPoint Point, Format OutputFormat)
{
switch (OutputFormat)
{
case Format.MPC:
return(RASexa(Point.RA) + " " + DecSexa(Point.Dec));
case Format.MPC_RA:
return(RASexa(Point.RA));
case Format.MPC_Dec:
return(DecSexa(Point.Dec));
case Format.MPC_Tab:
return(RASexa(Point.RA) + "\t" + DecSexa(Point.Dec));
case Format.RadSpace:
return(Point.RA.ToString() + " " + Point.Dec.ToString());
case Format.RadExplicit:
return("RA=" + Point.RA.ToString() + " " + "Dec=" + Point.Dec.ToString());
default:
throw new ArgumentOutOfRangeException(nameof(OutputFormat));
}
}
/// <summary>
/// Preloads detections into the search structures.
/// </summary>
/// <param name="Detections">Detected sources.</param>
public void LoadDetections(List <ImageDetection> Detections)
{
if (DetectionPool != null)
{
throw new NotSupportedException("Cannot modify the detection pool after it is generated");
}
PoolList.AddRange(Detections);
foreach (ImageDetection md in Detections)
{
EquatorialPoint ep = md.Barycenter.EP;
if (ep.Dec < Topmost)
{
Topmost = ep.Dec;
}
if (ep.Dec > Lowermost)
{
Lowermost = ep.Dec;
}
if (ep.RA < Leftmost)
{
Leftmost = ep.RA;
}
if (ep.RA > Rightmost)
{
Rightmost = ep.RA;
}
if (!ObsTimes.Any((x) => Math.Abs((md.Time.Time - x).TotalSeconds) < .1))
{
ObsTimes.Add(md.Time.Time);
}
}
}
/// <summary>
/// Recovers the tracklet on a given set of images (typically pipeline input ones).
/// </summary>
/// <returns><c>true</c>, if tracklet was recovered, <c>false</c> otherwise.</returns>
/// <param name="tvr"><see cref="TrackletVelocityRegression"/> from which the positions are computed.</param>
/// <param name="InputImages">Images on which to perform the recovery.</param>
/// <param name="Recovered">Recovered tracklet.</param>
public bool RecoverTracklet(TrackletVelocityRegression tvr, IEnumerable <Image> InputImages, out Tracklet Recovered)
{
List <ImageDetection> Detections = new List <ImageDetection>();
foreach (Image img in InputImages)
{
/* Compute location */
ObservationTime obTime = img.GetProperty <ObservationTime>();
double Secs = (obTime.Time - tvr.ZeroTime).TotalSeconds;
EquatorialPoint eqp = new EquatorialPoint()
{
RA = tvr.P_TR.Slope * Secs + tvr.P_TR.Intercept, Dec = tvr.P_TD.Slope * Secs + tvr.P_TD.Intercept
};
Position p = new Position(eqp, img.Transform.GetPixelPoint(eqp));
/* Perform recovery */
if (RecoverDetection(p, img, RecoverRadius, InputImages, out ImageDetection RecD))
{
Detections.Add(RecD);
}
}
if (Detections.Count >= MinDetections)
{
Recovered = StandardTrackletFactory.CreateTracklet(Detections.ToArray());
return(true);
}
else
{
Recovered = null; return(false);
}
}
/// <summary>
/// Retrieves a list of reference stars around a given position.
/// </summary>
/// <param name="Center">Location around which to search.</param>
/// <param name="Radius">Radius (in radians) of the search cone.</param>
/// <param name="LowMagLimit">Lowest star magnitude to include in results.</param>
/// <returns>A list of StarInfo containing the data of the reference stars.</returns>
public static List <StarInfo> GetVizieRObjects(EquatorialPoint Center, double Radius, double LowMagLimit)
{
double RadiusArcMin = Radius * 180 * 60 / Math.PI;
string URL = VizieRURL + Center.FormatToString(EquatorialPointStringFormatter.Format.MPC) + "&-c.r=" + RadiusArcMin.ToString("0.00");
string Data = "";
using (WebClient client = new WebClient())
try
{ client.Proxy = null; Data = client.DownloadString(URL); }
catch (WebException)
{ return(new List <StarInfo>()); }
string[] lines = Data.Split('\n');
int i;
List <string[]> objsString = new List <string[]>();
/* Skip to beginning of table */
for (i = 0; i < lines.Length; i++)
{
if (lines[i].StartsWith("----"))
{
break;
}
}
/* Read each line and split values (table is TSV) */
for (i++; i < lines.Length; i++)
{
objsString.Add(lines[i].Split('\t'));
}
List <StarInfo> sti = new List <StarInfo>(objsString.Count);
/* Foreach entry */
foreach (string[] sk in objsString)
{
/* Check if it matches the 14-entry format recognized */
if (sk.Length != 14)
{
continue;
}
/* The next 3 should be in order: */
sk[1] = sk[1].Trim(); /* RA */
sk[2] = sk[2].Trim(); /* Dec */
sk[12] = sk[12].Trim(); /* R2mag */
if (string.IsNullOrEmpty(sk[1]) | string.IsNullOrEmpty(sk[2]) | string.IsNullOrEmpty(sk[12]))
{
continue;
}
StarInfo sif = new StarInfo();
double RA = double.Parse(sk[1]) * Math.PI / 180;
double Dec = double.Parse(sk[2]) * Math.PI / 180;
EquatorialPoint EqP = new EquatorialPoint()
{
RA = RA, Dec = Dec
};
sif.Coordinate = EqP;
sif.Magnitude = double.Parse(sk[12]);
sti.Add(sif);
}
return(sti.Where((x) => x.Magnitude < LowMagLimit).ToList());
}
/// <summary>
/// Generates an URL for the non-standard interface to SkyBoT.
/// </summary>
/// <returns>The URL to be used with <see cref="GetObjects(string, DateTime, out List{SkybotObject})"/>.</returns>
/// <param name="Location">Location around which to search.</param>
/// <param name="Radius">Search radius.</param>
/// <param name="Time">The time at which to search for objects.</param>
/// <param name="ObsCode">Observatory code.</param>
public static string GenerateNSUrl(EquatorialPoint Location, double Radius, DateTime Time, string ObsCode)
{
double JulianDate = (Time - new DateTime(1970, 1, 1, 0, 0, 0)).TotalDays + 2440587.5;
string Params = string.Format(NSParameters, JulianDate, (Location.RA * 180 / Math.PI), (Location.Dec * 180 / Math.PI),
(Radius * 180 / Math.PI), ObsCode);
return(NSInterface + Params);
}
public void TryPairDot(ImageDetection a, ImageDetection b)
{
if (a.FetchProperty <PairingProperties>().IsPaired || b.FetchProperty <PairingProperties>().IsPaired)
{
return;
}
TimeSpan DeltaTime = b.Time.Time - a.Time.Time;
var Line = b.Barycenter.EP - a.Barycenter.EP;
double PairEstimatedDistance = ~Line;
if (PairEstimatedDistance > MaxVDD * DeltaTime.TotalMinutes)
{
return;
}
if (PairEstimatedDistance < MinVDD * DeltaTime.TotalMinutes)
{
return;
}
double PairEstimatedDistanceError = 2 * (a.FetchProperty <ObjectSize>().PixelEllipse.SemiaxisMajor + b.FetchProperty <ObjectSize>().PixelEllipse.SemiaxisMajor);
PairEstimatedDistanceError *= a.ParentImage.Transform.GetEstimatedWCSChainDerivative();
double PairEstimatedVelocity = PairEstimatedDistance / DeltaTime.TotalSeconds;
double PairEstimatedVelocityError = PairEstimatedDistanceError / DeltaTime.TotalSeconds;
List <List <ImageDetection> > DetectedInPool = new List <List <ImageDetection> >();
List <ImageDetection[]> DIPAr = new List <ImageDetection[]>();
foreach (DateTime dt in ObsTimes)
{
TimeSpan tsp = dt - b.Time.Time;
double EstDistance = PairEstimatedVelocity * tsp.TotalSeconds;
double EstDistError = Math.Abs(PairEstimatedVelocityError * tsp.TotalSeconds) + PairEstimatedDistanceError;
EquatorialPoint EstimatedPoint = Line + EstDistance;
var DetectionsList = DetectionPool.Query(EstimatedPoint.RA, EstimatedPoint.Dec, EstDistError);
DetectionsList.RemoveAll((x) => ((x.Barycenter.EP ^ EstimatedPoint) > EstDistError) || (x.Time.Time != dt) || !x.FetchProperty <PairingProperties>().IsDotDetection);
//DetectedInPool.Add(DetectionsList);
DIPAr.Add(DetectionsList.ToArray());
}
int i, c = 0;
for (i = 0; i < DIPAr.Count; i++)
{
if (DIPAr[i].Length != 0)
{
c++;
}
}
if (c >= 3)
{
CandidatePairings.Add(DIPAr.ToArray());
foreach (ImageDetection[] mdl in DIPAr)
{
foreach (ImageDetection m in mdl)
{
m.FetchProperty <PairingProperties>().IsPaired = true;
}
}
}
}
/// <summary>
/// Generates an URL for the Simple Cone Search interface, to be used with <see cref="GetObjects(string, DateTime, out List{SkybotObject})"/>.
/// </summary>
/// <returns>The URL to be used with <see cref="GetObjects(string, DateTime, out List{SkybotObject})"/>.</returns>
/// <param name="Location">Location around which to search.</param>
/// <param name="Radius">Search radius.</param>
/// <param name="Time">The time at which to search for objects.</param>
public static string GenerateSCSUrl(EquatorialPoint Location, double Radius, DateTime Time)
{
string url = SkybotURL;
double JulianDate = (Time - new DateTime(1970, 1, 1, 0, 0, 0)).TotalDays + 2440587.5;
url += JulianDate.ToString() + "&RA=" + (Location.RA * 180 / Math.PI).ToString() + "&DEC=" + (Location.Dec * 180 / Math.PI).ToString();
url += "&SR=" + (Radius * 180 / Math.PI).ToString() + "&VERB=1";
return(url);
}
public SkybotObject(string Name, string Position, DateTime Time, int?PermDesignation, string Class, double magV, double ErrPos)
{
this.Name = Name;
this.Position = EquatorialPointStringFormatter.ParseFromMPCString(Position);
this.TimeCoordinate = Time;
this.PermanentDesignation = PermDesignation;
this.Class = Class;
this.VisualMagnitude = magV;
this.PositionUncertainty = ErrPos;
}
/// <summary>
/// Performs a median filter between multiple data sets.
/// </summary>
/// <param name="Inputs">Input data.</param>
/// <param name="Output">Output data.</param>
/// <param name="InputPositions">Input alignments.</param>
/// <param name="OutputPosition">Output alignment.</param>
/// <param name="empty">Dummy argument.</param>
static void MultiImageMedianFilter(double[][,] Inputs, double[,] Output, SchedCore.ImageSegmentPosition[] InputPositions, SchedCore.ImageSegmentPosition OutputPosition, object empty)
{
PixelPoint[] InputAlignments = InputPositions.Select((x) => x.Alignment).ToArray();
PixelPoint OutputAlignment = OutputPosition.Alignment;
IWCSProjection[] InputImagesTransforms = InputPositions.Select((x) => x.WCS).ToArray();
IWCSProjection OutputImageTransform = OutputPosition.WCS;
int OW = Output.GetLength(1);
int OH = Output.GetLength(0);
int i, j, k, c;
double[] MedValues = new double[Inputs.Length];
PixelPoint pxp = new PixelPoint();
for (i = 0; i < OH; i++)
{
for (j = 0; j < OW; j++)
{
pxp.X = j + OutputAlignment.X; pxp.Y = i + OutputAlignment.Y;
EquatorialPoint eqp = OutputImageTransform.GetEquatorialPoint(pxp);
c = 0;
for (k = 0; k < Inputs.Length; k++)
{
PixelPoint pyp = InputImagesTransforms[k].GetPixelPoint(eqp);
pyp.X = Math.Round(pyp.X - InputAlignments[k].X); pyp.Y = Math.Round(pyp.Y - InputAlignments[k].Y);
if (pyp.X < 0 || pyp.X >= Inputs[k].GetLength(1))
{
continue;
}
if (pyp.Y < 0 || pyp.Y >= Inputs[k].GetLength(0))
{
continue;
}
double dex = Inputs[k][(int)pyp.Y, (int)pyp.X];
MedValues[c] = dex;
c++;
}
if (c == 0)
{
continue;
}
Array.Sort(MedValues);
if (c % 2 == 1)
{
Output[i, j] = MedValues[c / 2];
}
else
{
Output[i, j] = MedValues[c / 2 - 1];
}
}
}
}
public override ProjectionPoint GetProjectionPoint(EquatorialPoint Point)
{
double CC = Sin(Point.Dec) * Sin(Dec) + Cos(Point.Dec) * Cos(Dec) * Cos(Point.RA - RA);
double Xn = Cos(Point.Dec) * Sin(Point.RA - RA) / CC;
double Yn = (Cos(Dec) * Sin(Point.Dec) - Sin(Dec) * Cos(Point.Dec) * Cos(Point.RA - RA)) / CC;
return(new ProjectionPoint()
{
X = Xn, Y = Yn
});
}
/// <summary>
/// Returns the spherical distance between 2 points on the sphere.
/// </summary>
public static double GetDistance(EquatorialPoint A, EquatorialPoint B)
{
double DeltaPhi = A.Dec - B.Dec;
double DeltaLambda = A.RA - B.RA;
double HvPhi = Sin(DeltaPhi / 2);
double HvLbd = Sin(DeltaLambda / 2);
double HaverRoot = HvPhi * HvPhi + Cos(A.Dec) * Cos(B.Dec) * HvLbd * HvLbd;
double Distance = 2 * Asin(Sqrt(HaverRoot));
return(Distance);
}
/// <summary>Attempts to find a tracklet given 2 image detections (from separate images).</summary>
void AnalyzePair(ImageDetection a, ImageDetection b)
{
/* Figure out line vector */
double SepSec = (b.Time.Time - a.Time.Time).TotalSeconds;
LinearRegression.LinearRegressionParameters RAT = LinearRegression.ComputeLinearRegression(new double[] { 0, SepSec },
new double[] { a.Barycenter.EP.RA, b.Barycenter.EP.RA });
LinearRegression.LinearRegressionParameters DecT = LinearRegression.ComputeLinearRegression(new double[] { 0, SepSec },
new double[] { a.Barycenter.EP.Dec, b.Barycenter.EP.Dec });
/* Search for objects */
List <ImageDetection[]> Dects = new List <ImageDetection[]>();
foreach (DateTime dt in ObsTimes)
{
/* Compute estimated position */
TimeSpan tsp = dt - a.Time.Time;
double tspSeconds = tsp.TotalSeconds;
EquatorialPoint eqp = new EquatorialPoint()
{
RA = RAT.Intercept + RAT.Slope * tspSeconds, Dec = DecT.Intercept + DecT.Slope * tspSeconds
};
/* Limit is given by a triangle with the maximum residuals */
List <ImageDetection> ImDL = FindSourcesAround(a, b, dt, eqp, SearchExtraSmall);
if (ImDL.Count == 0)
{
ImDL = FindSourcesAround(a, b, dt, eqp, SearchExtraBig);
}
Dects.Add(ImDL.ToArray());
}
/* If it can be found on at least 3 images, consider it a detection */
int i, c = 0;
for (i = 0; i < Dects.Count; i++)
{
if (Dects[i].Length != 0)
{
c++;
}
}
if (c >= 3)
{
CandidatePairings.Add(Dects.ToArray());
foreach (ImageDetection[] mdl in Dects)
{
foreach (ImageDetection m in mdl)
{
m.FetchOrCreate <PairingProperties>().IsPaired = true;
}
}
}
}
public override EquatorialPoint[] GetEquatorialPoints(ProjectionPoint[] Points)
{
EquatorialPoint[] EqP = new EquatorialPoint[Points.Length];
for (int i = 0; i < Points.Length; i++)
{
double X = Points[i].X;
double Y = Points[i].Y;
double Rho = Sqrt(X * X + Y * Y + ADDC);
double C = Atan(Rho);
EqP[i].RA = RA + Atan2(X, Cos(Dec) - Y * Sin(Dec));
EqP[i].Dec = Asin((Y * Cos(Dec) + Sin(Dec)) * Cos(C));
}
return(EqP);
}
/// <summary>
/// Generates the great circle through the 2 given points.
/// </summary>
/// <param name="A">The positive direction of the great circle.</param>
/// <param name="B">The origin of the great circle.</param>
public GreatLine(EquatorialPoint A, EquatorialPoint B)
{
double sA = Cos(A.Dec), sB = Cos(B.Dec);
this.A = new Vector3D()
{
X = sA * Cos(A.RA), Y = sA * Sin(A.RA), Z = Sin(A.Dec)
};
this.B = new Vector3D()
{
X = sB * Cos(B.RA), Y = sB * Sin(B.RA), Z = Sin(B.Dec)
};
AlphaAngle = GetDistance(A, B);
}
/// <summary>
/// Calibrate the zero point of the specified image.
/// </summary>
/// <returns>The Zero Point magnitude.</returns>
/// <param name="Img">Image to calibrate.</param>
/// <param name="Args">Calibration parameters.</param>
/// <returns>The Zero Point magnitude.</returns>
public static double CalibrateImage(Image Img, CalibrationArgs Args)
{
DotDetector StarDetector = new DotDetector()
{
HighThresholdMultiplier = Args.StarHighThreshold,
LowThresholdMultiplier = Args.StarLowThreshold,
MinPix = 15,
NonrepresentativeThreshold = Args.NonRepThreshold
};
StarDetector.Parameters.Xstep = 0;
StarDetector.Parameters.Ystep = 200;
var StList = StarDetector.DetectRaw(Img);
var LocalStars = StList.Where((x) => x.Flux > Args.MinFlux & x.Flux < Args.MaxFlux).Where((x) => !x.PixelValues.Any((y) => y > Args.ClippingPoint)).
Select((x) => new Star()
{
EqCenter = Img.Transform.GetEquatorialPoint(x.Barycenter), Flux = x.Flux, PixCenter = x.Barycenter
}).ToList();
PixelPoint PixC = new PixelPoint()
{
X = Img.Width / 2, Y = Img.Height / 2
};
PixelPoint DiagF = new PixelPoint()
{
X = Img.Width, Y = Img.Height
};
double Diag = Img.Transform.GetEquatorialPoint(new PixelPoint()
{
X = 0, Y = 0
}) ^ Img.Transform.GetEquatorialPoint(DiagF);
EquatorialPoint EqCenter = Img.Transform.GetEquatorialPoint(PixC);
List <StarInfo> RemoteStars = GetVizieRObjects(EqCenter, Diag / 2, Args.MaxVizierMag);
for (int i = 0; i < RemoteStars.Count; i++)
{
for (int j = i + 1; j < RemoteStars.Count; j++)
{
if ((RemoteStars[i].Coordinate ^ RemoteStars[j].Coordinate) < Arc1Sec * Args.PositionError * DoubleStarRatio)
{
RemoteStars.RemoveAt(j); RemoteStars.RemoveAt(i); i--; break;
}
}
}
return(Calibrate(RemoteStars, LocalStars, Args.PositionError));
}
/// <summary>
/// Computes the second minimum value of multiple images.
/// </summary>
/// <param name="Inputs">Input data.</param>
/// <param name="Output">Output data.</param>
/// <param name="InputPositions">Input alignments.</param>
/// <param name="OutputPosition">Output alignment.</param>
/// <param name="empty">Dummy argument.</param>
static void SeMinFilter(double[][,] Inputs, double[,] Output, SchedCore.ImageSegmentPosition[] InputPositions, SchedCore.ImageSegmentPosition OutputPosition, object empty)
{
PixelPoint[] InputAlignments = InputPositions.Select((x) => x.Alignment).ToArray();
PixelPoint OutputAlignment = OutputPosition.Alignment;
IWCSProjection[] InputImagesTransforms = InputPositions.Select((x) => x.WCS).ToArray();
IWCSProjection OutputImageTransform = OutputPosition.WCS;
int OW = Output.GetLength(1);
int OH = Output.GetLength(0);
int i, j, k;
PixelPoint pxp = new PixelPoint();
for (i = 0; i < OH; i++)
{
for (j = 0; j < OW; j++)
{
double Min = double.MaxValue, Min2 = double.MaxValue;
pxp.X = j + OutputAlignment.X; pxp.Y = i + OutputAlignment.Y;
EquatorialPoint eqp = OutputImageTransform.GetEquatorialPoint(pxp);
for (k = 0; k < Inputs.Length; k++)
{
PixelPoint pyp = InputImagesTransforms[k].GetPixelPoint(eqp);
pyp.X = Math.Round(pyp.X - InputAlignments[k].X); pyp.Y = Math.Round(pyp.Y - InputAlignments[k].Y);
if (pyp.X < 0 || pyp.X >= Inputs[k].GetLength(1))
{
continue;
}
if (pyp.Y < 0 || pyp.Y >= Inputs[k].GetLength(0))
{
continue;
}
double dex = Inputs[k][(int)pyp.Y, (int)pyp.X];
if (dex < Min)
{
Min2 = Min; Min = dex; continue;
}
if (dex < Min2)
{
Min2 = dex;
}
}
Output[i, j] = Min2;
}
}
}
public static List <SkybotObject> GetObjects(EquatorialPoint Location, double Radius, DateTime Time)
{
/* Prepares the query */
string url = GenerateSCSUrl(Location, Radius, Time);
string result = string.Empty;
/* Tries querying the SkyBoT server, returining nothing if it fails. */
try
{
result = (new WebClient()).DownloadString(url);
}
catch
{
return(new List <SkybotObject>());
}
/* Parsing Skybot output: specific selection of vot:TABLEDATA and namespace cleanup */
int sel1 = result.IndexOf("<vot:TABLEDATA>", StringComparison.InvariantCulture);
if (sel1 == -1)
{
return(new List <SkybotObject>());
}
string data = result.Substring(sel1);
int sel2 = data.IndexOf("</vot:TABLEDATA>", StringComparison.InvariantCulture);
data = data.Substring(0, sel2 + 16);
data = data.Replace("vot:", "");
/* Parsing xml output */
XDocument xdoc = XDocument.Parse(data);
List <SkybotObject> objs = new List <SkybotObject>();
XElement key = xdoc.Elements().ToArray()[0];
foreach (XElement xe in key.Elements())
{
var z = xe.Elements().ToArray();
string permdes = z[0].Value;
string name = z[1].Value;
string ra = z[2].Value;
string dec = z[3].Value;
string cls = z[4].Value;
int? pd = int.TryParse(permdes, out int pdi) ? (int?)pdi : null;
SkybotObject oj = new SkybotObject(name, ra + " " + dec, Time, pd, cls, 0, 0);
objs.Add(oj);
}
return(objs);
}
/// <summary>
/// Attempts to recover a detection on a given image, comparing with the entire set of exposures.
/// </summary>
/// <returns><c>true</c>, if detection was recovered, <c>false</c> otherwise.</returns>
/// <param name="DetPos">Position of the detection to recover.</param>
/// <param name="Img">Image on which to recover.</param>
/// <param name="Radius">Maximum radius of the detection.</param>
/// <param name="InputImages">Input images.</param>
/// <param name="Recovered">Recovered detection.</param>
public bool RecoverDetection(Position DetPos, Image Img, double Radius, IEnumerable <Image> InputImages, out ImageDetection Recovered)
{
Recovered = null;
DotDetector.DotDetection dd = Recover(DetPos.PP, Radius, Img);
if (dd.Pixels.Count < MinPix)
{
return(false);
}
int NoiseCnt = 0;
int FixedCnt = 0;
foreach (Image img in InputImages)
{
/* Noise scanner -- same position in pixel coordinates */
DotDetector.DotDetection detN = Recover(dd.Barycenter, Radius, img);
PixelPoint npp = img.Transform.GetPixelPoint(Img.Transform.GetEquatorialPoint(dd.Barycenter));
/* Star scanner -- same position in equatorial coordinates */
DotDetector.DotDetection detF = Recover(npp, Radius, img);
if (detN.Pixels.Count > NoisePixelThreshold * dd.Pixels.Count)
{
NoiseCnt++;
}
if (detF.Flux > StarFluxThreshold * dd.Flux)
{
EquatorialPoint org = DetPos.EP;
EquatorialPoint nw = img.Transform.GetEquatorialPoint(detF.Barycenter);
if ((org ^ nw) < MinMoveArcSec)
{
FixedCnt++;
}
}
}
if (NoiseCnt > CrossMatchRemove)
{
return(false);
}
if (FixedCnt > CrossMatchRemove)
{
return(false);
}
Recovered = StandardDetectionFactory.CreateDetection(Img, dd.Pixels, dd.PixelValues);
return(true);
}
/// <summary>
/// Parses a MPC string into an EquatorialPoint.
/// </summary>
/// <param name="Point">MPC-style coordinate string.</param>
/// <returns>EquatorialPoint with specified coordinates.</returns>
public static EquatorialPoint ParseFromMPCString(string Point)
{
EquatorialPoint eqp = new EquatorialPoint();
string[] Components = Point.Split(' ', ':');
if (Components.Length != 6)
{
throw new FormatException();
}
eqp.RA = Math.PI * ((double.Parse(Components[2]) / 60 + double.Parse(Components[1])) / 60 + double.Parse(Components[0])) / 12;
if (Components[3][0] != '-')
{
eqp.Dec = Math.PI * ((double.Parse(Components[5]) / 60 + double.Parse(Components[4])) / 60 + double.Parse(Components[3])) / 180;
}
else
{
eqp.Dec = Math.PI * (double.Parse(Components[3]) - (double.Parse(Components[5]) / 60 + double.Parse(Components[4])) / 60) / 180;
}
return(eqp);
}
/// <summary>
/// Masks the input image with a given mask. Masked pixels are set to -1 standard deviation.
/// </summary>
/// <param name="Input">Input image data.</param>
/// <param name="Output">Output image data.</param>
/// <param name="InputPosition">Input data position.</param>
/// <param name="OutputPosition">Output data position.</param>
/// <param name="Properties">Mask data.</param>
static void MaskImage(double[,] Input, double[,] Output, ImageSegmentPosition InputPosition, ImageSegmentPosition OutputPosition, MaskProperties Properties)
{
int Width = Output.GetLength(1);
int Height = Output.GetLength(0);
int i, j;
PixelPoint pxp = new PixelPoint();
for (i = 0; i < Height; i++)
{
for (j = 0; j < Width; j++)
{
pxp.X = j + OutputPosition.Alignment.X; pxp.Y = i + OutputPosition.Alignment.Y;
EquatorialPoint ep = OutputPosition.WCS.GetEquatorialPoint(pxp);
PixelPoint mpt = Properties.MaskTransform.GetPixelPoint(ep);
mpt.X = Math.Round(mpt.X); mpt.Y = Math.Round(mpt.Y);
if (mpt.X < 0 || mpt.X >= Properties.MaskData[0].Length)
{
continue;
}
if (mpt.Y < 0 || mpt.Y >= Properties.MaskData.Length)
{
continue;
}
PixelPoint ipt = InputPosition.WCS.GetPixelPoint(ep);
ipt.X = Math.Round(ipt.X - InputPosition.Alignment.X); ipt.Y = Math.Round(ipt.Y - InputPosition.Alignment.Y);
if (Properties.MaskData[(int)mpt.Y][(int)mpt.X])
{
Output[i, j] = -Properties.StDev;
}
else
{
Output[i, j] = Input[(int)ipt.Y, (int)ipt.X] - Properties.Mean;
}
}
}
}
/// <summary>
/// Provides great circle navigation.
/// </summary>
/// <param name="A">Endpoint.</param>
/// <param name="B">Startpoint.</param>
/// <param name="Distance">Distance to navigate.</param>
/// <returns>The point Distance away from B on the great circle defined by A and B.</returns>
public static EquatorialPoint GetGreatCircleWaypoint(EquatorialPoint A, EquatorialPoint B, double Distance)
{
double sA = Cos(A.Dec), sB = Cos(B.Dec);
Vector3D vA = new Vector3D()
{
X = sA * Cos(A.RA), Y = sA * Sin(A.RA), Z = Sin(A.Dec)
};
Vector3D vB = new Vector3D()
{
X = sB * Cos(B.RA), Y = sB * Sin(B.RA), Z = Sin(B.Dec)
};
double Alpha = GetDistance(A, B);
double mA = -Sin(Distance) / Sin(Alpha);
double mB = Sin(Distance + Alpha) / Sin(Alpha);
Vector3D vCs = mA * vA + mB * vB;
double RA = Atan2(vCs.Y, vCs.X);
double Dec = Atan2(vCs.Z, Sqrt(vCs.X * vCs.X + vCs.Y * vCs.Y));
return(new EquatorialPoint()
{
RA = RA, Dec = Dec
});
}
/// <summary>Creates the property.</summary>
public SkyBotImageData(Image Image) : base(Image)
{
PixelPoint CPP = new PixelPoint()
{
X = Image.Width / 2, Y = Image.Height / 2
};
PixelPoint Corner1 = new PixelPoint()
{
X = 0, Y = 0
};
PixelPoint Corner2 = new PixelPoint()
{
X = Image.Width, Y = Image.Height
};
ImageCenter = Image.Transform.GetEquatorialPoint(CPP);
Radius = Image.Transform.GetEquatorialPoint(Corner1) ^ Image.Transform.GetEquatorialPoint(Corner2);
Radius *= 0.55;
ShotTime = Image.GetProperty <ObservationTime>().Time;
Exposure = Image.GetProperty <ObservationTime>().Exposure;
AssociatedImage = Image;
}
public List <string> QueryWhyNot(EquatorialPoint Point, double ArcSecLook)
{
ArcSecLook *= Math.PI / 180 / 3600;
List <string> r = new List <string>();
foreach (var kvp in RemovalPoints)
{
if ((kvp.Key ^ Point) < ArcSecLook)
{
r.Add(kvp.Value);
}
}
if (r.Count == 0)
{
foreach (var d in AllDetections)
{
if ((d.Barycenter ^ Point) < ArcSecLook)
{
r.Add("Post-filtering (recovery)");
}
}
}
return(r);
}
static EquatorialPoint ComputeBoundingDisk(IEnumerable <Tracklet> Tracklets, out double Radius)
{
double RAmin = 100, RAmax = -100, DecMin = 100, DecMax = -100;
foreach (Tracklet tk in Tracklets)
{
foreach (ImageDetection imd in tk.Detections)
{
EquatorialPoint q = imd.Barycenter.EP;
if (q.RA < RAmin)
{
RAmin = q.RA;
}
if (q.RA > RAmax)
{
RAmax = q.RA;
}
if (q.Dec < DecMin)
{
DecMin = q.RA;
}
if (q.Dec > DecMax)
{
DecMax = q.RA;
}
}
}
double CenterRA = (RAmax + RAmin) / 2, CenterDec = (DecMax + DecMin) / 2;
double DeltRA2 = (RAmax - RAmin) / 2, DeltDec2 = (DecMax - DecMin) / 2;
Radius = RadiusMultiplier * Math.Sqrt(CenterRA * CenterRA + CenterDec * CenterDec);
return(new EquatorialPoint()
{
RA = CenterRA, Dec = CenterDec
});
}
public PixelPoint GetPixelPoint(EquatorialPoint Point)
{
return(LinearTransform.GetPixelPoint(ProjectionTransform.GetProjectionPoint(Point)));
}
public abstract ProjectionPoint GetProjectionPoint(EquatorialPoint Point);
