Dear Orekit Team,
my name is Javier Montemayor, I am an intern at Fraunhofer Institute for High-Speed Dynamics. I am currently interested in using the Orekit library for a project that we’re working on. However, the tutorials seem to skip some essential code and I am finding myself with some difficulties trying to get it working. I am doing the propagation tutorial, but I get an exception on the line where it calls TimeScalesFactory.getUTC();
I would really appreciate some help as in what is required to get the library running without (unexpected) issues.
I’ve copied the code I used at the end of this email (I have some console indicators to detect where the error happened).
Sincerely,
Javier Montemayor
import org.orekit.frames.*;
import org.orekit.time.*;
import org.orekit.orbits.*;
public class Test {
public static void main(String args[]) {
try {
System.out.println("Setting up inertial frame...");
Frame inertialFrame = FramesFactory.getEME2000();
System.out.println("
Setting up initial state..."); TimeScale utc = TimeScalesFactory.getUTC(); // Throws exception
System.out.println("UTC done.");
AbsoluteDate initialDate = new AbsoluteDate(2004, 01, 01, 23, 30, 00.000, utc);
System.out.println("Initial date done.");
double mu = 3.986004415e+14;
double a = 24396159; // semi major axis in meters
double e = 0.72831215; // eccentricity
double i = Math.toRadians(7); // inclination
double omega = Math.toRadians(180); // perigee argument
double raan = Math.toRadians(261); // right ascension of ascending node
double lM = 0; // mean anomaly
System.out.println("
Setting up orbit..."); Orbit initialOrbit = new KeplerianOrbit(a, e, i, omega, raan, lM, PositionAngle.MEAN,
inertialFrame, initialDate, mu);
System.out.println("
Done."); } catch (Exception e) {
System.out.println("Error.");
}
}
}