public void get_InitStateJx(IAgOrbitStateClassical keplerState)
{
keplerState.SizeShapeType = AgEClassicalSizeShape.eSizeShapeSemimajorAxis;
IAgClassicalSizeShapeSemimajorAxis Orbitsize = keplerState.SizeShape as IAgClassicalSizeShapeSemimajorAxis;
keplerState.LocationType = AgEClassicalLocation.eLocationTrueAnomaly;
IAgClassicalLocationTrueAnomaly OrbitLocation = keplerState.Location as IAgClassicalLocationTrueAnomaly;
IAgClassicalOrientation OrbitOrientation = keplerState.Orientation as IAgClassicalOrientation;
OrbitOrientation.AscNodeType = AgEOrientationAscNode.eAscNodeRAAN;
IAgOrientationAscNodeRAAN OrbitAsc = keplerState.Orientation.AscNode as IAgOrientationAscNodeRAAN;
SemiMajorAxis = Orbitsize.SemiMajorAxis;
Eccentricity = Orbitsize.Eccentricity;
Inclination = OrbitOrientation.Inclination;
ArgOfPerigee = OrbitOrientation.ArgOfPerigee;
RAAN = OrbitAsc.Value;
TrueAnomaly = OrbitLocation.Value;
//Console.WriteLine(Orbitsize.SemiMajorAxis);
//IAgQuantity a = OrbitOrientation as IAgQuantity;
//Console.WriteLine(OrbitOrientation.Inclination);
}
/* This code takes a set of Cartesian coordinates in a fixed frame and converts them into Keplerian orbital elements in an inertial frame
* without using a satellite object (using conversion utility within STK Engine). The Keplerian elements you would like to return can be specified
* by changing the enum values near the top of the Main function.
*/
static void Main(string[] args)
{
AgSTKXApplication app = new AgSTKXApplication();
app.NoGraphics = true;
AgStkObjectRoot root = new AgStkObjectRoot();
// Here are some preliminary variables for the classical coordinate elements you would like to obtain
SizeShapeTypes SizeShapeType = SizeShapeTypes.Altitude;
AscNodeTypes AscNodeType = AscNodeTypes.RAAN;
LocationTypes LocationType = LocationTypes.ArgumentOfLatitude;
// Here we create a new AgOrbitState object
IAgConversionUtility ConversionUtility = root.ConversionUtility;
IAgOrbitState cartesianOrbit = ConversionUtility.NewOrbitStateOnEarth();
// Here is how you display and change the epoch
Console.WriteLine("Epoch:");
cartesianOrbit.Epoch = "1 Jun 2003 17:00:00.000";
Console.WriteLine(cartesianOrbit.Epoch);
// Here we assign whatever Cartesian coordinates we would like to in a fixed frame
cartesianOrbit.AssignCartesian(AgECoordinateSystem.eCoordinateSystemFixed, 5598.42, -14988.6, 4.80738, 3.408, 1.27376, 2.60903);
// Now we convert the orbit to a classical orbit state
IAgOrbitStateClassical classicalOrbit = cartesianOrbit.ConvertTo(AgEOrbitStateType.eOrbitStateClassical) as IAgOrbitStateClassical;
Console.WriteLine(classicalOrbit.CoordinateSystemType);
// Prints out the first two classical orbit elements
switch (SizeShapeType)
{
case SizeShapeTypes.Altitude:
classicalOrbit.SizeShapeType = AgEClassicalSizeShape.eSizeShapeAltitude;
IAgClassicalSizeShapeAltitude sizeShapeAltitude = classicalOrbit.SizeShape as IAgClassicalSizeShapeAltitude;
Console.WriteLine("Apogee Altitude:");
Console.WriteLine(sizeShapeAltitude.ApogeeAltitude);
Console.WriteLine("Perigee Altitude:");
Console.WriteLine(sizeShapeAltitude.PerigeeAltitude);
break;
case SizeShapeTypes.MeanMotion:
classicalOrbit.SizeShapeType = AgEClassicalSizeShape.eSizeShapeMeanMotion;
IAgClassicalSizeShapeMeanMotion sizeShapeMeanMotion = classicalOrbit.SizeShape as IAgClassicalSizeShapeMeanMotion;
Console.WriteLine("Mean Motion:");
Console.WriteLine(sizeShapeMeanMotion.MeanMotion);
Console.WriteLine("Eccentricity:");
Console.WriteLine(sizeShapeMeanMotion.Eccentricity);
break;
case SizeShapeTypes.Period:
classicalOrbit.SizeShapeType = AgEClassicalSizeShape.eSizeShapePeriod;
IAgClassicalSizeShapePeriod sizeShapePeriod = classicalOrbit.SizeShape as IAgClassicalSizeShapePeriod;
Console.WriteLine("Period:");
Console.WriteLine(sizeShapePeriod.Period);
Console.WriteLine("Eccentricity:");
Console.WriteLine(sizeShapePeriod.Eccentricity);
break;
case SizeShapeTypes.Radius:
classicalOrbit.SizeShapeType = AgEClassicalSizeShape.eSizeShapeRadius;
IAgClassicalSizeShapeRadius sizeShapeRadius = classicalOrbit.SizeShape as IAgClassicalSizeShapeRadius;
Console.WriteLine("Apogee Radius:");
Console.WriteLine(sizeShapeRadius.ApogeeRadius);
Console.WriteLine("Perigee Radius:");
Console.WriteLine(sizeShapeRadius.PerigeeRadius);
break;
case SizeShapeTypes.SemimajorAxis:
classicalOrbit.SizeShapeType = AgEClassicalSizeShape.eSizeShapeSemimajorAxis;
IAgClassicalSizeShapeSemimajorAxis sizeShapeSemimajorAxis = classicalOrbit.SizeShape as IAgClassicalSizeShapeSemimajorAxis;
Console.WriteLine("Semimajor Axis:");
Console.WriteLine(sizeShapeSemimajorAxis.SemiMajorAxis);
Console.WriteLine("Eccentricity:");
Console.WriteLine(sizeShapeSemimajorAxis.Eccentricity);
break;
}
// Prints the inclination and argument of perigee
IAgClassicalOrientation orientation = classicalOrbit.Orientation;
Console.WriteLine("Inclination:");
Console.WriteLine(orientation.Inclination);
Console.WriteLine("Argument of Perigee:");
Console.WriteLine(orientation.ArgOfPerigee);
// This section prints the ascending node value
Console.WriteLine("Ascending Node:");
switch (AscNodeType)
{
case AscNodeTypes.RAAN:
orientation.AscNodeType = AgEOrientationAscNode.eAscNodeRAAN;
IAgOrientationAscNodeRAAN ascNodeRAAN = orientation.AscNode as IAgOrientationAscNodeRAAN;
Console.WriteLine(ascNodeRAAN.Value);
break;
case AscNodeTypes.LAN:
orientation.AscNodeType = AgEOrientationAscNode.eAscNodeLAN;
IAgOrientationAscNodeLAN ascNodeLAN = orientation.AscNode as IAgOrientationAscNodeLAN;
Console.WriteLine(ascNodeLAN.Value);
break;
}
// This section prints the location of the satellite along the orbit in terms of whatever you would like
Console.WriteLine("Location:");
switch (LocationType)
{
case LocationTypes.ArgumentOfLatitude:
classicalOrbit.LocationType = AgEClassicalLocation.eLocationArgumentOfLatitude;
IAgClassicalLocationArgumentOfLatitude locationArgumentOfLatitude = classicalOrbit.Location as IAgClassicalLocationArgumentOfLatitude;
Console.WriteLine(locationArgumentOfLatitude.Value);
break;
case LocationTypes.EccentricAnomaly:
classicalOrbit.LocationType = AgEClassicalLocation.eLocationEccentricAnomaly;
IAgClassicalLocationEccentricAnomaly locationSpecificEccentricAnomaly = classicalOrbit.Location as IAgClassicalLocationEccentricAnomaly;
Console.WriteLine(locationSpecificEccentricAnomaly.Value);
break;
case LocationTypes.MeanAnomaly:
classicalOrbit.LocationType = AgEClassicalLocation.eLocationMeanAnomaly;
IAgClassicalLocationMeanAnomaly locationSpecificMeanAnomaly = classicalOrbit.Location as IAgClassicalLocationMeanAnomaly;
Console.WriteLine(locationSpecificMeanAnomaly.Value);
break;
case LocationTypes.TimePastAN:
classicalOrbit.LocationType = AgEClassicalLocation.eLocationTimePastAN;
IAgClassicalLocationTimePastAN locationSpecificTimePastAN = classicalOrbit.Location as IAgClassicalLocationTimePastAN;
Console.WriteLine(locationSpecificTimePastAN.Value);
break;
case LocationTypes.TimePastPerigee:
classicalOrbit.LocationType = AgEClassicalLocation.eLocationTimePastPerigee;
IAgClassicalLocationTimePastPerigee locationSpecificTimePastPerigee = classicalOrbit.Location as IAgClassicalLocationTimePastPerigee;
Console.WriteLine(locationSpecificTimePastPerigee.Value);
break;
case LocationTypes.TrueAnomaly:
classicalOrbit.LocationType = AgEClassicalLocation.eLocationTrueAnomaly;
IAgClassicalLocationTrueAnomaly locationTrueAnomaly = classicalOrbit.Location as IAgClassicalLocationTrueAnomaly;
Console.WriteLine(locationTrueAnomaly.Value);
break;
}
Console.ReadLine();
}
