@Test
public void testMiss() throws OrekitException {
final CircularOrbit circ =
new CircularOrbit(
7178000.0,
0.5e-4,
-0.5e-4,
FastMath.toRadians(0.),
FastMath.toRadians(270.),
FastMath.toRadians(5.300),
PositionAngle.MEAN,
FramesFactory.getEME2000(),
date,
mu);
final LofOffset upsideDown =
new LofOffset(circ.getFrame(), LOFType.VVLH, RotationOrder.XYX, FastMath.PI, 0, 0);
final LofOffsetPointing pointing =
new LofOffsetPointing(earthSpheric, upsideDown, Vector3D.PLUS_K);
try {
pointing.getTargetPV(circ, date, circ.getFrame());
Assert.fail("an exception should have been thrown");
} catch (OrekitException oe) {
Assert.assertEquals(
OrekitMessages.ATTITUDE_POINTING_LAW_DOES_NOT_POINT_TO_GROUND, oe.getSpecifier());
}
}
/** Test if both constructors are equivalent */
@Test
public void testLof() throws OrekitException {
// Satellite position
final CircularOrbit circ =
new CircularOrbit(
7178000.0,
0.5e-4,
-0.5e-4,
FastMath.toRadians(0.),
FastMath.toRadians(270.),
FastMath.toRadians(5.300),
PositionAngle.MEAN,
FramesFactory.getEME2000(),
date,
mu);
// Create lof aligned law
// ************************
final LofOffset lofLaw = new LofOffset(circ.getFrame(), LOFType.VVLH);
final LofOffsetPointing lofPointing =
new LofOffsetPointing(earthSpheric, lofLaw, Vector3D.PLUS_K);
final Rotation lofRot = lofPointing.getAttitude(circ, date, circ.getFrame()).getRotation();
// Compare to body center pointing law
// *************************************
final BodyCenterPointing centerLaw = new BodyCenterPointing(earthSpheric.getBodyFrame());
final Rotation centerRot = centerLaw.getAttitude(circ, date, circ.getFrame()).getRotation();
final double angleBodyCenter = centerRot.applyInverseTo(lofRot).getAngle();
Assert.assertEquals(0., angleBodyCenter, Utils.epsilonAngle);
// Compare to nadir pointing law
// *******************************
final NadirPointing nadirLaw = new NadirPointing(earthSpheric);
final Rotation nadirRot = nadirLaw.getAttitude(circ, date, circ.getFrame()).getRotation();
final double angleNadir = nadirRot.applyInverseTo(lofRot).getAngle();
Assert.assertEquals(0., angleNadir, Utils.epsilonAngle);
}
