async Task DisplaySatellite()
{
while (true)
{
closest = await SatelliteCalculations.FindClosestSatellite(userCoords.latitude, userCoords.longitude, userCoords.altitude);
SatelliteName = closest.name;
SatelliteDistance = closest.distance.ToString() + " km";
System.Threading.Thread.Sleep(100);
}
}
public MainPage()
{
InitializeComponent();
BindingContext = this;
//GetMediaAsync();
closest = new Satellite("Oi, you need to click the button", 69);
if (SatelliteCalculations.UpdateTLEData())
{
IsFindVisible = true;
}
UserLatitude = userCoords.latitude;
UserLongitude = userCoords.longitude;
UserAltitude = userCoords.altitude;
}
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();
}
