Examples with GeodeticPoint org.orekit.bodies.GeodeticPoint used on opensource projects

Example 6 with GeodeticPoint

use of org.orekit.bodies.GeodeticPoint in project Orekit by CS-SI.

the class HarrisPriesterTest method testParameterN.

@Test
public void testParameterN() throws OrekitException {
    final HarrisPriester hp = new HarrisPriester(sun, earth);
    // Position at 500 km height
    final GeodeticPoint point = new GeodeticPoint(0, 0, 500000.);
    final Vector3D pos = earth.transform(point);
    // COMPUTE DENSITY KG/M3 RHO
    final double rho4 = hp.getDensity(date, pos, earthFrame);
    final HarrisPriester hp2 = new HarrisPriester(sun, earth, 2);
    // COMPUTE DENSITY KG/M3 RHO
    final double rho2 = hp2.getDensity(date, pos, earthFrame);
    final HarrisPriester hp6 = new HarrisPriester(sun, earth, 6);
    // COMPUTE DENSITY KG/M3 RHO
    final double rho6 = hp6.getDensity(date, pos, earthFrame);
    final double c2Psi2 = 0.02163787;
    Assert.assertEquals(c2Psi2, (rho6 - rho2) / (rho4 - rho2) - 1., 1.e-8);
}

Example 7 with GeodeticPoint

use of org.orekit.bodies.GeodeticPoint in project Orekit by CS-SI.

the class HarrisPriesterTest method testOutOfRange.

@Test(expected = OrekitException.class)
public void testOutOfRange() throws OrekitException {
    final HarrisPriester hp = new HarrisPriester(sun, earth);
    // Position at 50 km height
    final GeodeticPoint point = new GeodeticPoint(0, 0, 50000.);
    final Vector3D pos = earth.transform(point);
    // COMPUTE DENSITY KG/M3 RHO
    hp.getDensity(date, pos, earthFrame);
}

Example 8 with GeodeticPoint

use of org.orekit.bodies.GeodeticPoint in project Orekit by CS-SI.

the class HarrisPriesterTest method testMaxAlt.

@Test
public void testMaxAlt() throws OrekitException {
    final HarrisPriester hp = new HarrisPriester(sun, earth);
    // Position at 1500 km height
    final GeodeticPoint point = new GeodeticPoint(0, 0, 1500000.);
    final Vector3D pos = earth.transform(point);
    // COMPUTE DENSITY KG/M3 RHO
    final double rho = hp.getDensity(date, pos, earthFrame);
    Assert.assertEquals(0.0, rho, 0.0);
}

Example 9 with GeodeticPoint

use of org.orekit.bodies.GeodeticPoint in project Orekit by CS-SI.

the class NRLMSISE00Test method testDensity.

@Test
public void testDensity() throws OrekitException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
    // Build the input params provider
    final InputParams ip = new InputParams();
    // Get Sun
    final PVCoordinatesProvider sun = CelestialBodyFactory.getSun();
    // Get Earth body shape
    final Frame itrf = FramesFactory.getITRF(IERSConventions.IERS_2010, true);
    final OneAxisEllipsoid earth = new OneAxisEllipsoid(Constants.WGS84_EARTH_EQUATORIAL_RADIUS, Constants.WGS84_EARTH_FLATTENING, itrf);
    // Build the model
    final NRLMSISE00 atm = new NRLMSISE00(ip, sun, earth).withSwitch(9, -1);
    // Build the date
    final AbsoluteDate date = new AbsoluteDate(new DateComponents(2003, 172), new TimeComponents(29000.), TimeScalesFactory.getUT1(IERSConventions.IERS_2010, true));
    // Build the position
    final double alt = 400.;
    final double lat = 60.;
    final double lon = -70.;
    final GeodeticPoint point = new GeodeticPoint(FastMath.toRadians(lat), FastMath.toRadians(lon), alt * 1000.);
    final Vector3D pos = earth.transform(point);
    // Run
    final double rho = atm.getDensity(date, pos, itrf);
    final double lst = 29000. / 3600. - 70. / 15.;
    final double[] ap = { 4., 100., 100., 100., 100., 100., 100. };
    Class<?> outputClass = getOutputClass();
    Constructor<?> cons = outputClass.getDeclaredConstructor(NRLMSISE00.class, Integer.TYPE, Double.TYPE, Double.TYPE, Double.TYPE, Double.TYPE, Double.TYPE, Double.TYPE, double[].class);
    cons.setAccessible(true);
    Method gtd7d = outputClass.getDeclaredMethod("gtd7d", Double.TYPE);
    gtd7d.setAccessible(true);
    Method getDensity = outputClass.getDeclaredMethod("getDensity", Integer.TYPE);
    getDensity.setAccessible(true);
    final Object out = createOutput(atm, 172, 29000., 60., -70, lst, 150., 150., ap);
    gtd7d.invoke(out, 400.0);
    Assert.assertEquals(rho, ((Double) getDensity.invoke(out, 5)).doubleValue(), rho * 1.e-3);
}

Example 10 with GeodeticPoint

use of org.orekit.bodies.GeodeticPoint in project Orekit by CS-SI.

the class GroundStationTest method testEstimateStationPosition.

@Test
public void testEstimateStationPosition() throws OrekitException, IOException, ClassNotFoundException {
    Context context = EstimationTestUtils.eccentricContext("regular-data:potential:tides");
    final NumericalPropagatorBuilder propagatorBuilder = context.createBuilder(OrbitType.KEPLERIAN, PositionAngle.TRUE, true, 1.0e-6, 60.0, 0.001);
    // create perfect range measurements
    final Propagator propagator = EstimationTestUtils.createPropagator(context.initialOrbit, propagatorBuilder);
    final List<ObservedMeasurement<?>> measurements = EstimationTestUtils.createMeasurements(propagator, new RangeMeasurementCreator(context), 1.0, 3.0, 300.0);
    // move one station
    final RandomGenerator random = new Well19937a(0x4adbecfc743bda60l);
    final TopocentricFrame base = context.stations.get(0).getBaseFrame();
    final BodyShape parent = base.getParentShape();
    final Vector3D baseOrigin = parent.transform(base.getPoint());
    final Vector3D deltaTopo = new Vector3D(2 * random.nextDouble() - 1, 2 * random.nextDouble() - 1, 2 * random.nextDouble() - 1);
    final Transform topoToParent = base.getTransformTo(parent.getBodyFrame(), (AbsoluteDate) null);
    final Vector3D deltaParent = topoToParent.transformVector(deltaTopo);
    final String movedSuffix = "-moved";
    final GroundStation moved = new GroundStation(new TopocentricFrame(parent, parent.transform(baseOrigin.subtract(deltaParent), parent.getBodyFrame(), null), base.getName() + movedSuffix), context.ut1.getEOPHistory(), context.stations.get(0).getDisplacements());
    // create orbit estimator
    final BatchLSEstimator estimator = new BatchLSEstimator(new LevenbergMarquardtOptimizer(), propagatorBuilder);
    for (final ObservedMeasurement<?> measurement : measurements) {
        final Range range = (Range) measurement;
        final String name = range.getStation().getBaseFrame().getName() + movedSuffix;
        if (moved.getBaseFrame().getName().equals(name)) {
            estimator.addMeasurement(new Range(moved, range.getDate(), range.getObservedValue()[0], range.getTheoreticalStandardDeviation()[0], range.getBaseWeight()[0]));
        } else {
            estimator.addMeasurement(range);
        }
    }
    estimator.setParametersConvergenceThreshold(1.0e-3);
    estimator.setMaxIterations(100);
    estimator.setMaxEvaluations(200);
    // we want to estimate station offsets
    moved.getEastOffsetDriver().setSelected(true);
    moved.getNorthOffsetDriver().setSelected(true);
    moved.getZenithOffsetDriver().setSelected(true);
    EstimationTestUtils.checkFit(context, estimator, 2, 3, 0.0, 5.6e-7, 0.0, 1.4e-6, 0.0, 4.8e-7, 0.0, 2.6e-10);
    Assert.assertEquals(deltaTopo.getX(), moved.getEastOffsetDriver().getValue(), 4.5e-7);
    Assert.assertEquals(deltaTopo.getY(), moved.getNorthOffsetDriver().getValue(), 6.2e-7);
    Assert.assertEquals(deltaTopo.getZ(), moved.getZenithOffsetDriver().getValue(), 2.6e-7);
    GeodeticPoint result = moved.getOffsetGeodeticPoint(null);
    GeodeticPoint reference = context.stations.get(0).getBaseFrame().getPoint();
    Assert.assertEquals(reference.getLatitude(), result.getLatitude(), 1.4e-14);
    Assert.assertEquals(reference.getLongitude(), result.getLongitude(), 2.9e-14);
    Assert.assertEquals(reference.getAltitude(), result.getAltitude(), 2.6e-7);
    RealMatrix normalizedCovariances = estimator.getOptimum().getCovariances(1.0e-10);
    RealMatrix physicalCovariances = estimator.getPhysicalCovariances(1.0e-10);
    Assert.assertEquals(9, normalizedCovariances.getRowDimension());
    Assert.assertEquals(9, normalizedCovariances.getColumnDimension());
    Assert.assertEquals(9, physicalCovariances.getRowDimension());
    Assert.assertEquals(9, physicalCovariances.getColumnDimension());
    Assert.assertEquals(0.55431, physicalCovariances.getEntry(6, 6), 1.0e-5);
    Assert.assertEquals(0.22694, physicalCovariances.getEntry(7, 7), 1.0e-5);
    Assert.assertEquals(0.13106, physicalCovariances.getEntry(8, 8), 1.0e-5);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(bos);
    oos.writeObject(moved.getEstimatedEarthFrame().getTransformProvider());
    Assert.assertTrue(bos.size() > 155000);
    Assert.assertTrue(bos.size() < 160000);
    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    ObjectInputStream ois = new ObjectInputStream(bis);
    EstimatedEarthFrameProvider deserialized = (EstimatedEarthFrameProvider) ois.readObject();
    Assert.assertEquals(moved.getPrimeMeridianOffsetDriver().getValue(), deserialized.getPrimeMeridianOffsetDriver().getValue(), 1.0e-15);
    Assert.assertEquals(moved.getPrimeMeridianDriftDriver().getValue(), deserialized.getPrimeMeridianDriftDriver().getValue(), 1.0e-15);
    Assert.assertEquals(moved.getPolarOffsetXDriver().getValue(), deserialized.getPolarOffsetXDriver().getValue(), 1.0e-15);
    Assert.assertEquals(moved.getPolarDriftXDriver().getValue(), deserialized.getPolarDriftXDriver().getValue(), 1.0e-15);
    Assert.assertEquals(moved.getPolarOffsetYDriver().getValue(), deserialized.getPolarOffsetYDriver().getValue(), 1.0e-15);
    Assert.assertEquals(moved.getPolarDriftYDriver().getValue(), deserialized.getPolarDriftYDriver().getValue(), 1.0e-15);
}