@Test
public void testOnlyPre1972Data() throws OrekitException {
Utils.setDataRoot("USNO");
TimeScalesFactory.addUTCTAIOffsetsLoader(
new TAIUTCDatFilesLoader("tai-utc-only-pre-1972-data.dat"));
// linear models between 1961 and 1972
checkOffset(1961, 1, 2, -(1.422818 + 1 * 0.001296)); // MJD 37300 + 1
checkOffset(1961, 8, 2, -(1.372818 + 213 * 0.001296)); // MJD 37300 + 213
checkOffset(1962, 1, 2, -(1.845858 + 1 * 0.0011232)); // MJD 37665 + 1
checkOffset(1963, 11, 2, -(1.945858 + 670 * 0.0011232)); // MJD 37665 + 670
checkOffset(1964, 1, 2, -(3.240130 - 365 * 0.001296)); // MJD 38761 - 365
checkOffset(1964, 4, 2, -(3.340130 - 274 * 0.001296)); // MJD 38761 - 274
checkOffset(1964, 9, 2, -(3.440130 - 121 * 0.001296)); // MJD 38761 - 121
checkOffset(1965, 1, 2, -(3.540130 + 1 * 0.001296)); // MJD 38761 + 1
checkOffset(1965, 3, 2, -(3.640130 + 60 * 0.001296)); // MJD 38761 + 60
checkOffset(1965, 7, 2, -(3.740130 + 182 * 0.001296)); // MJD 38761 + 182
checkOffset(1965, 9, 2, -(3.840130 + 244 * 0.001296)); // MJD 38761 + 244
checkOffset(1966, 1, 2, -(4.313170 + 1 * 0.002592)); // MJD 39126 + 1
checkOffset(1968, 2, 2, -(4.213170 + 762 * 0.002592)); // MJD 39126 + 762
// last linear drift is not stopped as we miss the first constant offset in 1972
checkOffset(1972, 3, 5, -(4.213170 + 2255 * 0.002592)); // MJD 39126 + 2255
checkOffset(1972, 7, 14, -(4.213170 + 2386 * 0.002592)); // MJD 39126 + 2386
checkOffset(1979, 12, 31, -(4.213170 + 5112 * 0.002592)); // MJD 39126 + 5112
checkOffset(1980, 1, 22, -(4.213170 + 5134 * 0.002592)); // MJD 39126 + 5134
checkOffset(2006, 7, 7, -(4.213170 + 14797 * 0.002592)); // MJD 39126 + 14797
checkOffset(2010, 7, 7, -(4.213170 + 16258 * 0.002592)); // MJD 39126 + 16258
checkOffset(2012, 7, 7, -(4.213170 + 16989 * 0.002592)); // MJD 39126 + 16989
checkOffset(2015, 7, 7, -(4.213170 + 18084 * 0.002592)); // MJD 39126 + 18084
}
@Test
public void testModifiedLinearData() throws OrekitException {
Utils.setDataRoot("USNO");
TimeScalesFactory.addUTCTAIOffsetsLoader(
new TAIUTCDatFilesLoader("tai-utc-modified-linear.dat"));
// linear models between 1961 and 1972
checkOffset(1961, 1, 2, -(1.4000000 + 1 * 0.001000)); // MJD 37300 + 1
checkOffset(1961, 8, 2, -(1.5000000 + 213 * 0.001100)); // MJD 37300 + 213
checkOffset(1962, 1, 2, -(1.6000000 + 1 * 0.001200)); // MJD 37665 + 1
checkOffset(1963, 11, 2, -(1.7000000 + 670 * 0.001300)); // MJD 37665 + 670
checkOffset(1964, 1, 2, -(1.8000000 - 365 * 0.001400)); // MJD 38761 - 365
checkOffset(1964, 4, 2, -(1.9000000 - 274 * 0.001500)); // MJD 38761 - 274
checkOffset(1964, 9, 2, -(2.0000000 - 121 * 0.001600)); // MJD 38761 - 121
checkOffset(1965, 1, 2, -(2.1000000 + 1 * 0.001700)); // MJD 38761 + 1
checkOffset(1965, 3, 2, -(2.2000000 + 60 * 0.001800)); // MJD 38761 + 60
checkOffset(1965, 7, 2, -(2.3000000 + 182 * 0.001900)); // MJD 38761 + 182
checkOffset(1965, 9, 2, -(2.4000000 + 244 * 0.002000)); // MJD 38761 + 244
checkOffset(1966, 1, 2, -(2.5000000 + 1 * 0.002100)); // MJD 39126 + 1
checkOffset(1968, 2, 2, -(2.6000000 + 762 * 0.002200)); // MJD 39126 + 762
// last linear drift is not stopped as we miss the first constant offset in 1972
checkOffset(1972, 3, 5, -(2.6000000 + 2255 * 0.002200)); // MJD 39126 + 2255
checkOffset(1972, 7, 14, -(2.6000000 + 2386 * 0.002200)); // MJD 39126 + 2386
checkOffset(1979, 12, 31, -(2.6000000 + 5112 * 0.002200)); // MJD 39126 + 5112
checkOffset(1980, 1, 22, -(2.6000000 + 5134 * 0.002200)); // MJD 39126 + 5134
checkOffset(2006, 7, 7, -(2.6000000 + 14797 * 0.002200)); // MJD 39126 + 14797
checkOffset(2010, 7, 7, -(2.6000000 + 16258 * 0.002200)); // MJD 39126 + 16258
checkOffset(2012, 7, 7, -(2.6000000 + 16989 * 0.002200)); // MJD 39126 + 16989
checkOffset(2015, 7, 7, -(2.6000000 + 18084 * 0.002200)); // MJD 39126 + 18084
}
/**
* load orekit data and gravity field.
*
* @throws Exception on error.
*/
@BeforeClass
public static void setUpBefore() throws Exception {
Utils.setDataRoot("earth:geoid:regular-data");
GravityFieldFactory.clearPotentialCoefficientsReaders();
GravityFieldFactory.addPotentialCoefficientsReader(new EGMFormatReader("egm96", false));
potential = GravityFieldFactory.getConstantNormalizedProvider(maxDegree, maxOrder);
}
@Test
public void testRegularFile() throws OrekitException {
Utils.setDataRoot("USNO");
// we arbitrary put UTC == TAI before 1961-01-01
checkOffset(1950, 1, 1, 0);
// linear models between 1961 and 1972
checkOffset(1961, 1, 2, -(1.422818 + 1 * 0.001296)); // MJD 37300 + 1
checkOffset(1961, 8, 2, -(1.372818 + 213 * 0.001296)); // MJD 37300 + 213
checkOffset(1962, 1, 2, -(1.845858 + 1 * 0.0011232)); // MJD 37665 + 1
checkOffset(1963, 11, 2, -(1.945858 + 670 * 0.0011232)); // MJD 37665 + 670
checkOffset(1964, 1, 2, -(3.240130 - 365 * 0.001296)); // MJD 38761 - 365
checkOffset(1964, 4, 2, -(3.340130 - 274 * 0.001296)); // MJD 38761 - 274
checkOffset(1964, 9, 2, -(3.440130 - 121 * 0.001296)); // MJD 38761 - 121
checkOffset(1965, 1, 2, -(3.540130 + 1 * 0.001296)); // MJD 38761 + 1
checkOffset(1965, 3, 2, -(3.640130 + 60 * 0.001296)); // MJD 38761 + 60
checkOffset(1965, 7, 2, -(3.740130 + 182 * 0.001296)); // MJD 38761 + 182
checkOffset(1965, 9, 2, -(3.840130 + 244 * 0.001296)); // MJD 38761 + 244
checkOffset(1966, 1, 2, -(4.313170 + 1 * 0.002592)); // MJD 39126 + 1
checkOffset(1968, 2, 2, -(4.213170 + 762 * 0.002592)); // MJD 39126 + 762
// since 1972-01-01, offsets are only whole seconds
checkOffset(1972, 3, 5, -10);
checkOffset(1972, 7, 14, -11);
checkOffset(1979, 12, 31, -18);
checkOffset(1980, 1, 22, -19);
checkOffset(2006, 7, 7, -33);
checkOffset(2010, 7, 7, -34);
checkOffset(2012, 7, 7, -35);
checkOffset(2015, 7, 7, -36);
}
@Deprecated
@Test
public void testDeprecatedAPI() throws OrekitException {
Utils.setDataRoot("USNO");
TimeScalesFactory.addUTCTAILoader(
new UTCTAILoader() {
@Override
public boolean stillAcceptsData() {
return false;
}
@Override
public void loadData(InputStream input, String name) {}
@Override
public SortedMap<DateComponents, Integer> loadTimeSteps() {
SortedMap<DateComponents, Integer> map = new TreeMap<DateComponents, Integer>();
map.put(new DateComponents(1972, 1, 1), 10);
map.put(new DateComponents(1972, 7, 1), 11);
return map;
}
@Override
public String getSupportedNames() {
return "non-existant-name";
}
});
checkOffset(1972, 1, 2, -10.0);
checkOffset(1972, 6, 30, -10.0);
checkOffset(1972, 7, 2, -11.0);
checkOffset(3000, 1, 1, -11.0);
}
private void checkException(String name, OrekitMessages message) {
Utils.setDataRoot("USNO");
TimeScalesFactory.addUTCTAIOffsetsLoader(new TAIUTCDatFilesLoader(name));
try {
TimeScalesFactory.getUTC();
Assert.fail("an exception should have been thrown");
} catch (OrekitException oe) {
Assert.assertEquals(message, oe.getSpecifier());
}
}
@Before
public void setUp() throws OrekitException {
Utils.setDataRoot("regular-data");
geoTLE =
new TLE(
"1 27508U 02040A 12021.25695307 -.00000113 00000-0 10000-3 0 7326",
"2 27508 0.0571 356.7800 0005033 344.4621 218.7816 1.00271798 34501");
leoTLE =
new TLE(
"1 31135U 07013A 11003.00000000 .00000816 00000+0 47577-4 0 11",
"2 31135 2.4656 183.9084 0021119 236.4164 60.4567 15.10546832 15");
}
@Before
public void setUp() throws OrekitException {
Utils.setDataRoot("regular-data:potential/shm-format");
GravityFieldFactory.addPotentialCoefficientsReader(
new SHMFormatReader("^eigen_cg03c_coef$", false));
mu = GravityFieldFactory.getUnnormalizedProvider(0, 0).getMu();
final Vector3D position = new Vector3D(7.0e6, 1.0e6, 4.0e6);
final Vector3D velocity = new Vector3D(-500.0, 8000.0, 1000.0);
initDate = AbsoluteDate.J2000_EPOCH;
final Orbit orbit =
new EquinoctialOrbit(
new PVCoordinates(position, velocity), FramesFactory.getEME2000(), initDate, mu);
initialState = new SpacecraftState(orbit);
double[][] tolerance = NumericalPropagator.tolerances(0.001, orbit, OrbitType.EQUINOCTIAL);
AdaptiveStepsizeIntegrator integrator =
new DormandPrince853Integrator(0.001, 200, tolerance[0], tolerance[1]);
integrator.setInitialStepSize(60);
propagator = new NumericalPropagator(integrator);
propagator.setInitialState(initialState);
}
@Before
public void setUp() throws OrekitException {
Utils.setDataRoot("regular-data");
earth =
new OneAxisEllipsoid(
Constants.WGS84_EARTH_EQUATORIAL_RADIUS,
Constants.WGS84_EARTH_FLATTENING,
FramesFactory.getITRF(IERSConventions.IERS_2010, true));
gp = new GeodeticPoint(FastMath.toRadians(51.0), FastMath.toRadians(66.6), 300.0);
final TimeScale utc = TimeScalesFactory.getUTC();
final Vector3D position = new Vector3D(-6142438.668, 3492467.56, -25767.257);
final Vector3D velocity = new Vector3D(505.848, 942.781, 7435.922);
final AbsoluteDate date = new AbsoluteDate(2003, 9, 16, utc);
orbit =
new EquinoctialOrbit(
new PVCoordinates(position, velocity),
FramesFactory.getEME2000(),
date,
Constants.EIGEN5C_EARTH_MU);
}
@Before
public void setUp() {
try {
Utils.setDataRoot("regular-data");
// Computation date
date =
new AbsoluteDate(
new DateComponents(2008, 04, 07), TimeComponents.H00, TimeScalesFactory.getUTC());
// Body mu
mu = 3.9860047e14;
// Reference frame = ITRF
frameItrf = FramesFactory.getITRF(IERSConventions.IERS_2010, true);
// Elliptic earth shape
earthSpheric = new OneAxisEllipsoid(6378136.460, 0., frameItrf);
} catch (OrekitException oe) {
Assert.fail(oe.getMessage());
}
}
@Before
public void setUp() {
Utils.setDataRoot("regular-data");
}
/** set Orekit data for useful debugging messages from dates. */
@BeforeClass
public static void setUpBefore() {
Utils.setDataRoot("regular-data");
}
@Before
public void setUp() throws OrekitException {
Utils.setDataRoot("regular-data:potential/shm-format");
GravityFieldFactory.addPotentialCoefficientsReader(
new SHMFormatReader("^eigen_cg03c_coef$", false));
}