Exemplo n.º 1
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  @Test(expected = OrekitException.class)
  public void testOutsideValidityTransform() throws Exception {
    final GeoMagneticField model1 = GeoMagneticFieldFactory.getIGRF(2005);
    final GeoMagneticField model2 = GeoMagneticFieldFactory.getIGRF(2010);

    // the interpolation transformation is only allowed between 2005 and 2010
    model1.transformModel(model2, 2012);
  }
Exemplo n.º 2
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  @Test
  public void testInterpolationYYY5() throws OrekitException {
    double decimalYear = GeoMagneticField.getDecimalYear(1, 1, 2005);
    GeoMagneticField field = GeoMagneticFieldFactory.getIGRF(decimalYear);
    GeoMagneticElements e = field.calculateField(1.2, 0.7, -2.5);
    Assert.assertEquals(-6.0032, e.getDeclination(), 1.0e-4);

    decimalYear = GeoMagneticField.getDecimalYear(2, 1, 2005);
    field = GeoMagneticFieldFactory.getIGRF(decimalYear);
    e = field.calculateField(1.2, 0.7, -2.5);
    Assert.assertEquals(-6.0029, e.getDeclination(), 1.0e-4);
  }
Exemplo n.º 3
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  @Test
  public void testInterpolationAtEndOfEpoch() throws OrekitException {
    double decimalYear = GeoMagneticField.getDecimalYear(31, 12, 2009);
    GeoMagneticField field1 = GeoMagneticFieldFactory.getIGRF(decimalYear);
    GeoMagneticField field2 = GeoMagneticFieldFactory.getIGRF(2010.0);

    Assert.assertNotEquals(field1.getEpoch(), field2.getEpoch());

    GeoMagneticElements e1 = field1.calculateField(0, 0, 0);
    Assert.assertEquals(-6.1068, e1.getDeclination(), 1.0e-4);

    GeoMagneticElements e2 = field2.calculateField(0, 0, 0);
    Assert.assertEquals(-6.1064, e2.getDeclination(), 1.0e-4);
  }
Exemplo n.º 4
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  @Test
  public void testIGRF() throws Exception {
    // test values from sample coordinate file
    // provided as part of the geomag 7.0 distribution available at
    // http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
    // modification: the julian day calculation of geomag is slightly different
    // to the one from the WMM code, we use the WMM convention thus the outputs
    // have been adapted.
    runSampleFile(FieldModel.IGRF, "sample_coords.txt", "sample_out_IGRF12.txt");

    final double eps = 1e-1;
    final double degreeEps = 1e-2;
    for (int i = 0; i < igrfTestValues.length; i++) {
      final GeoMagneticField model = GeoMagneticFieldFactory.getIGRF(igrfTestValues[i][0]);
      final GeoMagneticElements result =
          model.calculateField(igrfTestValues[i][2], igrfTestValues[i][3], igrfTestValues[i][1]);

      final Vector3D b = result.getFieldVector();

      // X
      Assert.assertEquals(igrfTestValues[i][4], b.getX(), eps);
      // Y
      Assert.assertEquals(igrfTestValues[i][5], b.getY(), eps);
      // Z
      Assert.assertEquals(igrfTestValues[i][6], b.getZ(), eps);
      // H
      Assert.assertEquals(igrfTestValues[i][7], result.getHorizontalIntensity(), eps);
      // F
      Assert.assertEquals(igrfTestValues[i][8], result.getTotalIntensity(), eps);
      // inclination
      Assert.assertEquals(igrfTestValues[i][9], result.getInclination(), degreeEps);
      // declination
      Assert.assertEquals(igrfTestValues[i][10], result.getDeclination(), degreeEps);
    }
  }
Exemplo n.º 5
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  @Test(expected = OrekitException.class)
  public void testUnsupportedTransform() throws Exception {
    final GeoMagneticField model = GeoMagneticFieldFactory.getIGRF(1910);

    // the IGRF model of 1910 does not have secular variation, thus time transformation is not
    // supported
    model.transformModel(1950);
  }
Exemplo n.º 6
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  @Test
  public void testInterpolationAtEndOfValidity() throws OrekitException {
    double decimalYear = GeoMagneticField.getDecimalYear(1, 1, 2020);
    GeoMagneticField field = GeoMagneticFieldFactory.getIGRF(decimalYear);

    GeoMagneticElements e = field.calculateField(0, 0, 0);
    Assert.assertEquals(-4.7446, e.getDeclination(), 1.0e-4);
  }
Exemplo n.º 7
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 @Test(expected = OrekitException.class)
 public void testTransformationOutsideValidityPeriod() throws OrekitException {
   double decimalYear = GeoMagneticField.getDecimalYear(10, 1, 2020);
   @SuppressWarnings("unused")
   GeoMagneticField field = GeoMagneticFieldFactory.getIGRF(decimalYear);
 }