@Test
public void testTLEFormat() throws OrekitException {
String line1 = "1 27421U 02021A 02124.48976499 -.00021470 00000-0 -89879-2 0 20";
String line2 = "2 27421 98.7490 199.5121 0001333 133.9522 226.1918 14.26113993 62";
Assert.assertTrue(TLE.isFormatOK(line1, line2));
TLE tle = new TLE(line1, line2);
Assert.assertEquals(27421, tle.getSatelliteNumber(), 0);
Assert.assertEquals(2002, tle.getLaunchYear());
Assert.assertEquals(21, tle.getLaunchNumber());
Assert.assertEquals("A", tle.getLaunchPiece());
Assert.assertEquals(-0.0089879, tle.getBStar(), 0);
Assert.assertEquals(0, tle.getEphemerisType());
Assert.assertEquals(98.749, FastMath.toDegrees(tle.getI()), 1e-10);
Assert.assertEquals(199.5121, FastMath.toDegrees(tle.getRaan()), 1e-10);
Assert.assertEquals(0.0001333, tle.getE(), 1e-10);
Assert.assertEquals(133.9522, FastMath.toDegrees(tle.getPerigeeArgument()), 1e-10);
Assert.assertEquals(226.1918, FastMath.toDegrees(tle.getMeanAnomaly()), 1e-10);
Assert.assertEquals(
14.26113993, tle.getMeanMotion() * Constants.JULIAN_DAY / (2 * FastMath.PI), 0);
Assert.assertEquals(tle.getRevolutionNumberAtEpoch(), 6, 0);
Assert.assertEquals(tle.getElementNumber(), 2, 0);
line1 = "1 27421U 02021A 02124.48976499 -.00021470 00000-0 -89879-2 0 20";
line2 = "2 27421 98.7490 199.5121 0001333 133.9522 226.1918 14*26113993 62";
Assert.assertFalse(TLE.isFormatOK(line1, line2));
line1 = "1 27421 02021A 02124.48976499 -.00021470 00000-0 -89879-2 0 20";
line2 = "2 27421 98.7490 199.5121 0001333 133.9522 226.1918 14.26113993 62";
Assert.assertFalse(TLE.isFormatOK(line1, line2));
line1 = "1 27421U 02021A 02124.48976499 -.00021470 00000-0 -89879-2 0 20";
line2 = "2 27421 98.7490 199.5121 0001333 133.9522 226.1918 10006113993 62";
Assert.assertFalse(TLE.isFormatOK(line1, line2));
line1 = "1 27421U 02021A 02124.48976499 -.00021470 00000-0 -89879 2 0 20";
line2 = "2 27421 98.7490 199.5121 0001333 133.9522 226.1918 14.26113993 62";
Assert.assertFalse(TLE.isFormatOK(line1, line2));
}
private void run(final File input, final File output, final String separator)
throws IOException, IllegalArgumentException, OrekitException {
// read input parameters
KeyValueFileParser<ParameterKey> parser =
new KeyValueFileParser<ParameterKey>(ParameterKey.class);
parser.parseInput(input.getAbsolutePath(), new FileInputStream(input));
double minElevation = parser.getAngle(ParameterKey.MIN_ELEVATION);
double radius =
Constants.WGS84_EARTH_EQUATORIAL_RADIUS
+ parser.getDouble(ParameterKey.SPACECRAFT_ALTITUDE);
int points = parser.getInt(ParameterKey.POINTS_NUMBER);
// station properties
double latitude = parser.getAngle(ParameterKey.STATION_LATITUDE);
double longitude = parser.getAngle(ParameterKey.STATION_LONGITUDE);
double altitude = parser.getDouble(ParameterKey.STATION_ALTITUDE);
String name = parser.getString(ParameterKey.STATION_NAME);
// compute visibility circle
List<GeodeticPoint> circle =
computeCircle(latitude, longitude, altitude, name, minElevation, radius, points);
// create a 2 columns csv file representing the visibility circle
// in the user home directory, with latitude in column 1 and longitude in column 2
DecimalFormat format = new DecimalFormat("#00.00000", new DecimalFormatSymbols(Locale.US));
PrintStream csvFile = new PrintStream(output);
for (GeodeticPoint p : circle) {
csvFile.println(
format.format(FastMath.toDegrees(p.getLatitude()))
+ ","
+ format.format(FastMath.toDegrees(p.getLongitude())));
}
csvFile.close();
}
@Test
public void testFrance() throws OrekitException {
final BodyShape earth =
new OneAxisEllipsoid(
Constants.WGS84_EARTH_EQUATORIAL_RADIUS,
Constants.WGS84_EARTH_FLATTENING,
FramesFactory.getITRF(IERSConventions.IERS_2010, true));
GeographicZoneDetector d =
new GeographicZoneDetector(20.0, 1.e-3, earth, buildFrance(), FastMath.toRadians(0.5))
.withHandler(new ContinueOnEvent<GeographicZoneDetector>());
Assert.assertEquals(20.0, d.getMaxCheckInterval(), 1.0e-15);
Assert.assertEquals(1.0e-3, d.getThreshold(), 1.0e-15);
Assert.assertEquals(0.5, FastMath.toDegrees(d.getMargin()), 1.0e-15);
Assert.assertEquals(AbstractDetector.DEFAULT_MAX_ITER, d.getMaxIterationCount());
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);
final Orbit orbit =
new EquinoctialOrbit(
new PVCoordinates(position, velocity),
FramesFactory.getEME2000(),
date,
Constants.EIGEN5C_EARTH_MU);
Propagator propagator =
new EcksteinHechlerPropagator(
orbit,
Constants.EIGEN5C_EARTH_EQUATORIAL_RADIUS,
Constants.EIGEN5C_EARTH_MU,
Constants.EIGEN5C_EARTH_C20,
Constants.EIGEN5C_EARTH_C30,
Constants.EIGEN5C_EARTH_C40,
Constants.EIGEN5C_EARTH_C50,
Constants.EIGEN5C_EARTH_C60);
EventsLogger logger = new EventsLogger();
propagator.addEventDetector(logger.monitorDetector(d));
propagator.propagate(date.shiftedBy(10 * Constants.JULIAN_DAY));
Assert.assertEquals(26, logger.getLoggedEvents().size());
}
@Test
public void testSerialization()
throws IOException, ClassNotFoundException, NoSuchFieldException, IllegalAccessException,
OrekitException {
final double r = Constants.WGS84_EARTH_EQUATORIAL_RADIUS;
final BodyShape earth =
new OneAxisEllipsoid(
r,
Constants.WGS84_EARTH_FLATTENING,
FramesFactory.getITRF(IERSConventions.IERS_2010, true));
GeographicZoneDetector d =
new GeographicZoneDetector(20.0, 1.e-3, earth, buildFrance(), FastMath.toRadians(0.5))
.withMargin(FastMath.toRadians(0.75))
.withHandler(new ContinueOnEvent<GeographicZoneDetector>());
Assert.assertEquals(r, ((OneAxisEllipsoid) d.getBody()).getEquatorialRadius(), 1.0e-12);
Assert.assertEquals(0.75, FastMath.toDegrees(d.getMargin()), 1.0e-12);
Assert.assertEquals(5.6807e11, d.getZone().getSize() * r * r, 1.0e9);
Assert.assertEquals(4.0289e6, d.getZone().getBoundarySize() * r, 1.0e3);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(d);
Assert.assertTrue(bos.size() > 2100);
Assert.assertTrue(bos.size() < 2200);
ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
ObjectInputStream ois = new ObjectInputStream(bis);
GeographicZoneDetector deserialized = (GeographicZoneDetector) ois.readObject();
Assert.assertEquals(d.getZone().getSize(), deserialized.getZone().getSize(), 1.0e-3);
Assert.assertEquals(
d.getZone().getBoundarySize(), deserialized.getZone().getBoundarySize(), 1.0e-3);
Assert.assertEquals(d.getZone().getTolerance(), deserialized.getZone().getTolerance(), 1.0e-15);
Assert.assertEquals(d.getMaxCheckInterval(), deserialized.getMaxCheckInterval(), 1.0e-15);
Assert.assertEquals(d.getThreshold(), deserialized.getThreshold(), 1.0e-15);
Assert.assertEquals(d.getMaxIterationCount(), deserialized.getMaxIterationCount());
Assert.assertTrue(
new RegionFactory<Sphere2D>().difference(d.getZone(), deserialized.getZone()).isEmpty());
}
