public void DrawLocation(Graphics g, CoordinateCalculator cCalc)
{
Sgp4Data position = SatFunctions.getSatPositionAtTime(Tle, new EpochTime(TimeKeeper.Now()), Sgp4.wgsConstant.WGS_84);
var point = SatFunctions.calcSatSubPoint(new EpochTime(TimeKeeper.Now()), position, Sgp4.wgsConstant.WGS_84);
var mappedPoint = cCalc.MapPoint(new PointF((float)point.getLongitude(), (float)point.getLatitude()));
mappedPoint = new PointF((float)Math.Round(mappedPoint.X), (float)Math.Round(mappedPoint.Y));
g.DrawImage(Properties.Resources.satellite, mappedPoint.X - 25, mappedPoint.Y - 25, 50, 50);
var font = new Font("Times New Roman", 18, FontStyle.Bold, GraphicsUnit.Pixel);
g.DrawString(Name, font, new SolidBrush(Color.OrangeRed), mappedPoint.X, mappedPoint.Y + 15);
}
/*****************************************************************************
* @function name : calECIDateAndVelocity
* @author : Kaguya
* @date : 2020/12/3 12:38
* @inparam :
* @outparam :
* @last change :
* @usage : 基于one_sgp4项目，计算航天器基于ECI坐标系下的位置和速度
*****************************************************************************/
public void calECIDateAndVelocity()
{
Tle tleISS = ParserTLE.parseTle(first, second, "ISS 1");
DateTime t = new DateTime(data[0], data[1], data[2], data[3], data[4], data[5]);
EpochTime startTime = new EpochTime(t);
Sgp4Data sate = SatFunctions.getSatPositionAtTime(tleISS, startTime, Sgp4.wgsConstant.WGS_84);
One_Sgp4.Point3d position = sate.getPositionData();
ECI = new double[3];
ECI[0] = position.x;
ECI[1] = position.y;
ECI[2] = position.z;
velocity = new double[3];
velocity[0] = sate.getVelocityData().x;
velocity[1] = sate.getVelocityData().y;
velocity[2] = sate.getVelocityData().z;
velocity = getECEF(velocity, data);
}
public void TestSatGroundPosition(int hh, int mm, int ss, int yyyy, int MM, int dd)
{
Tle tleISS = ParserTLE.parseTle(
"1 25544U 98067A 19356.46068278 .00000035 00000-0 86431-5 0 9990",
"2 25544 51.6420 147.9381 0007793 61.6458 55.7201 15.50124783204461",
"ISS 1");
EpochTime testTime = new EpochTime(hh, mm, ss, yyyy, MM, dd);
Sgp4Data data = SatFunctions.getSatPositionAtTime(tleISS, testTime, Sgp4.wgsConstant.WGS_84);
Assert.IsNotNull(data);
Coordinate ground = SatFunctions.calcSatSubPoint(testTime, data, Sgp4.wgsConstant.WGS_84);
Assert.Greater(ground.getHeight(), 0);
Assert.LessOrEqual(ground.getLongitude(), 180.0);
Assert.Greater(ground.getLongitude(), -180.0);
Assert.LessOrEqual(ground.getLatitude(), 90.0);
Assert.Greater(ground.getLatitude(), -90.0);
}
public static async Task <Satellite> FindClosestSatellite(double userLat, double userLong, double userHeight)
{
List <Tle> tleList = ParserTLE.ParseFile(pathToTLEData);
Vector3 difference = new Vector3(0, 0, 0);
Satellite closest = new Satellite("Temporary Satellite. If you see this, you done messed up", double.MaxValue);
List <Satellite> satellites = new List <Satellite>();
One_Sgp4.Coordinate observer = new Coordinate(userLat, userLong, userHeight);
for (int i = 0; i < tleList.Count; i++)
{
//Create Time points
EpochTime startTime = new EpochTime(DateTime.UtcNow);
EpochTime stopTime = new EpochTime(DateTime.UtcNow.AddHours(1));
One_Sgp4.Sgp4 sgp4Propagator = new Sgp4(tleList[i], Sgp4.wgsConstant.WGS_84);
try
{
sgp4Propagator.runSgp4Cal(startTime, stopTime, 0.5);
}
catch
{
Console.WriteLine("Something went wrong with " + tleList[i].getName());
}
List <One_Sgp4.Sgp4Data> resultDataList = new List <Sgp4Data>();
//Return Results containing satellite Position x,y,z (ECI-Coordinates in Km) and Velocity x_d, y_d, z_d (ECI-Coordinates km/s)
resultDataList = sgp4Propagator.getResults();
try
{
double localSiderealTime = startTime.getLocalSiderealTime(observer.getLongitude());
Sgp4Data grrPoint = One_Sgp4.SatFunctions.getSatPositionAtTime(tleList[0], startTime, Sgp4.wgsConstant.WGS_84);
One_Sgp4.Point3d sphCoordsSat = One_Sgp4.SatFunctions.calcSphericalCoordinate(observer, startTime, resultDataList[0]);
double distance = sphCoordsSat.x;
Satellite satellite = new Satellite(tleList[i].getName(), distance);
satellites.Add(satellite);
if (distance < closest.distance)
{
closest = satellite;
}
}
catch
{
//Something went wrong with a satellite, skipped
}
}
closest.distance = Math.Round(closest.distance, 2);
return(closest);
//Console.WriteLine("Done: " + satellites.Count + " satellites successfully analyzed from " + tleList.Count + " in the dataset.");
//Console.WriteLine("The closest active satellite is " + closest.name.Trim() + " which is " + Math.Round(closest.distance, 2).ToString() + " kilometres away from you. Time: " + DateTime.Now.ToString("HH:mm:ss"));
//Console.WriteLine();
}
static void Main(string[] args)
{
//Parse three line element
Tle tleISS = ParserTLE.parseTle(
"1 25544U 98067A 19097.23063721 -.00000469 00000-0 00000+0 0 9999",
"2 25544 51.6449 353.9503 0002279 151.1697 290.4275 15.52495932164239",
"ISS 1");
//Parse tle from file
if (System.IO.File.Exists("tleData.txt"))
{
List <Tle> tleList = ParserTLE.ParseFile("tleData.txt");
}
//Get TLE from Space-Track.org
//list of satellites by their NORAD ID
string[] noradIDs = { "8709", "43572" };
try
{
One_Sgp4.SpaceTrack.GetSpaceTrack(noradIDs, "USERNAME", "PASSWORD");
}
catch { Console.Out.WriteLine("Error could not retrive TLE's from Space-Track, Login credentials might be wrong"); }
//Create Time points
EpochTime startTime = new EpochTime(DateTime.UtcNow);
EpochTime anotherTime = new EpochTime(2018, 100.5); //(Year 2017, 100 day at 12:00 HH)
EpochTime stopTime = new EpochTime(DateTime.UtcNow.AddHours(1));
//Add 15 Seconds to EpochTime
anotherTime.addTick(15);
//Add 20 Min to EpochTime
anotherTime.addMinutes(15);
//Add 1 hour to EpochTime
anotherTime.addHours(1);
//Add 2 Days to EpochTime
anotherTime.addDays(2);
Console.Out.WriteLine(anotherTime.ToString());
//Calculate Satellite Position and Speed
One_Sgp4.Sgp4 sgp4Propagator = new Sgp4(tleISS, Sgp4.wgsConstant.WGS_84);
//set calculation parameters StartTime, EndTime and caclulation steps in minutes
sgp4Propagator.runSgp4Cal(startTime, stopTime, 1 / 30.0); // 1/60 => caclulate sat points every 2 seconds
List <One_Sgp4.Sgp4Data> resultDataList = new List <Sgp4Data>();
//Return Results containing satellite Position x,y,z (ECI-Coordinates in Km) and Velocity x_d, y_d, z_d (ECI-Coordinates km/s)
resultDataList = sgp4Propagator.getRestults();
//Coordinate of an observer on Ground lat, long, height(in meters)
One_Sgp4.Coordinate observer = new Coordinate(35.554595, 18.888574, 0);
//Convert to ECI coordinate system
One_Sgp4.Point3d eci = observer.toECI(startTime.getLocalSiderealTime());
//Get Local SiderealTime for Observer
double localSiderealTime = startTime.getLocalSiderealTime(observer.getLongitude());
//TESTING MIR
//TEST ECI
EpochTime T_eciTime = new EpochTime(09, 00, 00, 1995, 10, 1);
//Test GMST
if (T_eciTime.getLocalSiderealTime() == 2.524218)
{
}
Coordinate T_eciCoo = new Coordinate(40, -75);
var t_eci = T_eciCoo.toECI(T_eciTime.getLocalSiderealTime());
//Coordinate equals x' = 1703.295 km, y' = 4586.650 km, z' = 4077.984 km.
EpochTime t_time = new EpochTime(12, 46, 0, 1995, 11, 18);
Coordinate t_cord = new Coordinate(45.0, -93);
Sgp4Data mirPos = new Sgp4Data();
mirPos.setX(-4400.594);
mirPos.setY(1932.870);
mirPos.setZ(4760.712);
var lookAngels = SatFunctions.calcSphericalCoordinate(t_cord, t_time, mirPos);
var onGround = SatFunctions.calcSatSubPoint(t_time, mirPos, Sgp4.wgsConstant.WGS_72);
var r = t_cord.toECI(t_time.getLocalSiderealTime());
//Calculate if Satellite is Visible for a certain Observer on ground at certain timePoint
bool satelliteIsVisible = One_Sgp4.SatFunctions.isSatVisible(observer, 0.0, startTime, resultDataList[0]);
//Calculate Sperical Coordinates from an Observer to Satellite
//returns 3D-Point with range(km), azimuth(radians), elevation(radians) to the Satellite
One_Sgp4.Point3d spherical = One_Sgp4.SatFunctions.calcSphericalCoordinate(observer, startTime, resultDataList[0]);
//Calculate the Next 5 Passes over a point
//for a location, Satellite, StartTime, Accuracy in Seconds = 15sec, MaxNumber of Days = 5 Days, Wgs constant = WGS_84
//Returns pass with Location, StartTime of Pass, EndTime Of Pass, Max Elevation in Degrees
List <Pass> passes = One_Sgp4.SatFunctions.CalculatePasses(observer, tleISS, new EpochTime(DateTime.UtcNow), 15, 5, Sgp4.wgsConstant.WGS_84);
foreach (var p in passes)
{
Console.Out.WriteLine(p.ToString());
}
}
