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Commit 1a0e9a8b authored by Petrus Hyvönen's avatar Petrus Hyvönen
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Added FixedPointTleGenerationAlgTest

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test/FixedPointTleGenerationAlgorithmTest.py 0 → 100644
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"""
original copyright:
/* Copyright 2002-2024 CS GROUP
* Licensed to CS GROUP (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Python version translated from Java by Petrus Hyvönen and copilot, 2024
"""
import unittest
import jpype
from orekit_jpype import initVM
initVM()
from orekit_jpype.pyhelpers import setup_orekit_curdir
setup_orekit_curdir("resources")
# all orekit imports needs to come after the JVM is initialized
from org.hipparchus import CalculusFieldElement, Field
from org.hipparchus.analysis.differentiation import DSFactory, DerivativeStructure
from org.hipparchus.util import Binary64Field, FastMath
from org.orekit.frames import Frame, FramesFactory
from org.orekit.orbits import CartesianOrbit, FieldCartesianOrbit
from org.orekit.propagation import FieldPropagator, FieldSpacecraftState, Propagator, SpacecraftState
from org.orekit.propagation.analytical.tle import FieldTLE, FieldTLEPropagator, TLE, TLEPropagator
from org.orekit.time import AbsoluteDate
from org.orekit.utils import TimeStampedFieldPVCoordinates, TimeStampedPVCoordinates
from org.orekit.propagation.analytical.tle.generation import FixedPointTleGenerationAlgorithm
import math
import unittest
class FixedPointTleGenerationAlgorithmTest(unittest.TestCase):
def setUp(self):
self.geoTLE = 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")
self.leoTLE = 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")
def testOneMoreRevolution(self):
propagator = TLEPropagator.selectExtrapolator(self.leoTLE)
initRevolutionNumber = self.leoTLE.getRevolutionNumberAtEpoch()
dt = 2 * math.pi / self.leoTLE.getMeanMotion()
target = self.leoTLE.getDate().shiftedBy(dt)
endState = propagator.propagate(target)
endLEOTLE = FixedPointTleGenerationAlgorithm().generate(endState, self.leoTLE)
endRevolutionNumber = endLEOTLE.getRevolutionNumberAtEpoch()
self.assertEqual(initRevolutionNumber + 1, endRevolutionNumber)
def testOneLessRevolution(self):
propagator = TLEPropagator.selectExtrapolator(self.leoTLE)
initRevolutionNumber = self.leoTLE.getRevolutionNumberAtEpoch()
dt = -2 * math.pi / self.leoTLE.getMeanMotion()
target = self.leoTLE.getDate().shiftedBy(dt)
endState = propagator.propagate(target)
endLEOTLE = FixedPointTleGenerationAlgorithm().generate(endState, self.leoTLE)
endRevolutionNumber = endLEOTLE.getRevolutionNumberAtEpoch()
self.assertEqual(initRevolutionNumber - 1, endRevolutionNumber)
def testIssue781(self):
factory = DSFactory(6, 3)
line1 = "1 05709U 71116A 21105.62692147 .00000088 00000-0 00000-0 0 9999"
line2 = "2 05709 10.8207 310.3659 0014139 71.9531 277.0561 0.99618926100056"
self.assertTrue(TLE.isFormatOK(line1, line2))
fieldTLE = FieldTLE(factory.getDerivativeField(), line1, line2)
tlePropagator = FieldTLEPropagator.selectExtrapolator(fieldTLE, fieldTLE.getParameters(factory.getDerivativeField()))
fieldTLE1 = FixedPointTleGenerationAlgorithm().generate(tlePropagator.getInitialState(), fieldTLE)
self.assertEqual(line2, fieldTLE1.getLine2())
def testIssue802(self):
tleISS = TLE("1 25544U 98067A 21035.14486477 .00001026 00000-0 26816-4 0 9998",
"2 25544 51.6455 280.7636 0002243 335.6496 186.1723 15.48938788267977")
propagator = TLEPropagator.selectExtrapolator(tleISS)
state = propagator.propagate(tleISS.getDate())
eme2000 = FramesFactory.getEME2000()
pv = state.getPVCoordinates(eme2000)
orbit = CartesianOrbit(pv, eme2000, state.getMu())
rebuilt = FixedPointTleGenerationAlgorithm().generate(SpacecraftState(orbit), tleISS)
self.assertEqual(tleISS.getLine1(), rebuilt.getLine1())
self.assertEqual(tleISS.getLine2(), rebuilt.getLine2())
def testIssue802Field(self):
self.doTestIssue802Field(Binary64Field.getInstance())
def doTestIssue802Field(self, field):
tleISS = FieldTLE(field, "1 25544U 98067A 21035.14486477 .00001026 00000-0 26816-4 0 9998",
"2 25544 51.6455 280.7636 0002243 335.6496 186.1723 15.48938788267977")
propagator = FieldTLEPropagator.selectExtrapolator(tleISS, tleISS.getParameters(field))
fieldTLE1 = FixedPointTleGenerationAlgorithm().generate(propagator.getInitialState(), tleISS)
self.assertEqual(tleISS.getLine1(), fieldTLE1.getLine1())
self.assertEqual(tleISS.getLine2(), fieldTLE1.getLine2())
def testIssue864(self):
tleISS = TLE("1 25544U 98067A 21035.14486477 .00001026 00000-0 26816-4 0 9998",
"2 25544 51.6455 280.7636 0002243 335.6496 186.1723 15.48938788267977")
propagator = TLEPropagator.selectExtrapolator(tleISS)
state = propagator.propagate(tleISS.getDate())
tleISS.getParametersDrivers().forEach(lambda driver: driver.setSelected(True))
rebuilt = FixedPointTleGenerationAlgorithm().generate(state, tleISS)
rebuilt.getParametersDrivers().forEach(lambda driver: self.assertTrue(driver.isSelected()))
def testIssue859(self):
tle = TLE("1 33153U 08034A 21327.46310733 -.00000207 00000+0 00000+0 0 9990",
"2 33153 0.0042 20.7353 0003042 213.9370 323.2156 1.00270917 48929")
p = TLEPropagator.selectExtrapolator(tle)
algorithm = FixedPointTleGenerationAlgorithm(FixedPointTleGenerationAlgorithm.EPSILON_DEFAULT, 400, 0.5)
converted = algorithm.generate(p.getInitialState(), tle)
self.assertEqual(tle.getLine2(), converted.getLine2())
self.assertEqual(tle.getBStar(), converted.getBStar())
self.assertEqual(0., converted.getDate().durationFrom(tle.getDate()))
self.assertEqual(tle.getSatelliteNumber(), converted.getSatelliteNumber())
self.assertEqual(tle.getClassification(), converted.getClassification())
self.assertEqual(tle.getLaunchYear(), converted.getLaunchYear())
self.assertEqual(tle.getLaunchNumber(), converted.getLaunchNumber())
self.assertEqual(tle.getLaunchPiece(), converted.getLaunchPiece())
self.assertEqual(tle.getElementNumber(), converted.getElementNumber())
self.assertEqual(tle.getRevolutionNumberAtEpoch(), converted.getRevolutionNumberAtEpoch())
def testIssue859Field(self):
self.dotestIssue859Field(Binary64Field.getInstance())
def dotestIssue859Field(self, field):
tle = FieldTLE(field, "1 33153U 08034A 21327.46310733 -.00000207 00000+0 00000+0 0 9990",
"2 33153 0.0042 20.7353 0003042 213.9370 323.2156 1.00270917 48929")
p = FieldTLEPropagator.selectExtrapolator(tle, tle.getParameters(field, tle.getDate()))
algorithm = FixedPointTleGenerationAlgorithm(FixedPointTleGenerationAlgorithm.EPSILON_DEFAULT, 400, 0.5)
converted = algorithm.generate(p.getInitialState(), tle)
self.assertEqual(tle.getLine2(), converted.getLine2())
self.assertEqual(tle.getBStar(), converted.getBStar())
self.assertEqual(0., converted.getDate().durationFrom(tle.getDate()).getReal())
self.assertEqual(tle.getSatelliteNumber(), converted.getSatelliteNumber())
self.assertEqual(tle.getClassification(), converted.getClassification())
self.assertEqual(tle.getLaunchYear(), converted.getLaunchYear())
self.assertEqual(tle.getLaunchNumber(), converted.getLaunchNumber())
self.assertEqual(tle.getLaunchPiece(), converted.getLaunchPiece())
self.assertEqual(tle.getElementNumber(), converted.getElementNumber())
self.assertEqual(tle.getRevolutionNumberAtEpoch(), converted.getRevolutionNumberAtEpoch())
def testConversionLeo(self):
self.checkConversion(self.leoTLE, 5.2e-9)
def testConversionGeo(self):
self.checkConversion(self.geoTLE, 9.2e-8)
def checkConversion(self, tle, threshold):
propagator = TLEPropagator.selectExtrapolator(tle)
converted = FixedPointTleGenerationAlgorithm().generate(propagator.getInitialState(), tle)
self.assertEqual(tle.getSatelliteNumber(), converted.getSatelliteNumber())
self.assertEqual(tle.getClassification(), converted.getClassification())
self.assertEqual(tle.getLaunchYear(), converted.getLaunchYear())
self.assertEqual(tle.getLaunchNumber(), converted.getLaunchNumber())
self.assertEqual(tle.getLaunchPiece(), converted.getLaunchPiece())
self.assertEqual(tle.getElementNumber(), converted.getElementNumber())
self.assertEqual(tle.getRevolutionNumberAtEpoch(), converted.getRevolutionNumberAtEpoch())
self.assertAlmostEqual(tle.getMeanMotion(), converted.getMeanMotion(), delta=threshold * tle.getMeanMotion())
self.assertAlmostEqual(tle.getE(), converted.getE(), delta=threshold * tle.getE())
self.assertAlmostEqual(tle.getI(), converted.getI(), delta=threshold * tle.getI())
self.assertAlmostEqual(tle.getPerigeeArgument(), converted.getPerigeeArgument(), delta=threshold * tle.getPerigeeArgument())
self.assertAlmostEqual(tle.getRaan(), converted.getRaan(), delta=threshold * tle.getRaan())
self.assertAlmostEqual(tle.getMeanAnomaly(), converted.getMeanAnomaly(), delta=threshold * tle.getMeanAnomaly())
self.assertAlmostEqual(tle.getBStar(), converted.getBStar(), delta=threshold * tle.getBStar())
def testConversionLeoField(self):
self.doTestConversionLeoField(Binary64Field.getInstance())
def doTestConversionLeoField(self, field):
leoTLE = FieldTLE(field, "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")
self.checkConversion_field(leoTLE, field, 5.2e-9)
def testConversionGeoField(self):
self.doConversionGeoField(Binary64Field.getInstance())
def doConversionGeoField(self, field):
geoTLE = FieldTLE(field, "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")
self.checkConversion_field(geoTLE, field, 9.2e-8)
def checkConversion_field(self, tle, field, threshold):
propagator = FieldTLEPropagator.selectExtrapolator(tle, tle.getParameters(field, tle.getDate()))
converted = FixedPointTleGenerationAlgorithm().generate(propagator.getInitialState(), tle)
self.assertEqual(tle.getSatelliteNumber(), converted.getSatelliteNumber())
self.assertEqual(tle.getClassification(), converted.getClassification())
self.assertEqual(tle.getLaunchYear(), converted.getLaunchYear())
self.assertEqual(tle.getLaunchNumber(), converted.getLaunchNumber())
self.assertEqual(tle.getLaunchPiece(), converted.getLaunchPiece())
self.assertEqual(tle.getElementNumber(), converted.getElementNumber())
self.assertEqual(tle.getRevolutionNumberAtEpoch(), converted.getRevolutionNumberAtEpoch())
self.assertAlmostEqual(tle.getMeanMotion().getReal(), converted.getMeanMotion().getReal(), delta=threshold * tle.getMeanMotion().getReal())
self.assertAlmostEqual(tle.getE().getReal(), converted.getE().getReal(), delta=threshold * tle.getE().getReal())
self.assertAlmostEqual(tle.getI().getReal(), converted.getI().getReal(), delta=threshold * tle.getI().getReal())
self.assertAlmostEqual(tle.getPerigeeArgument().getReal(), converted.getPerigeeArgument().getReal(), delta=threshold * tle.getPerigeeArgument().getReal())
self.assertAlmostEqual(tle.getRaan().getReal(), converted.getRaan().getReal(), delta=threshold * tle.getRaan().getReal())
self.assertAlmostEqual(tle.getMeanAnomaly().getReal(), converted.getMeanAnomaly().getReal(), delta=threshold * tle.getMeanAnomaly().getReal())
self.assertAlmostEqual(tle.getBStar(), converted.getBStar(), delta=threshold * tle.getBStar())
if __name__ == '__main__':
unittest.main()
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