Commit 344d5cb7 authored by Luc Maisonobe's avatar Luc Maisonobe

Parsed orbital state time history.

parent b7e055b4
/* Copyright 2002-2019 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (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.
*/
package org.orekit.files.ccsds;
/** Orbit element set type used in CCSDS {@link OCMFile Orbit Comprehensive Messages}.
* @see <a href="https://sanaregistry.org/r/orbital_elements">SANA registry for orbital elements</a>
* @author Luc Maisonobe
* @since 10.1
*/
public enum CCSDSElementsType {
/** Spherical 6-element set (α,δ,β,A,r,v). */
ADBARV("Spherical 6-element set (α,δ,β,A,r,v)",
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG,
CCSDSUnit.DEG, CCSDSUnit.KM, CCSDSUnit.KM),
/** Cartesian 3-element position (X, Y, Z). */
CARTP("Cartesian 3-element position (X, Y, Z)",
CCSDSUnit.KM, CCSDSUnit.KM, CCSDSUnit.KM),
/** Cartesian 6-element position and velocity (X, Y, Z, XD, YD, ZD). */
CARTPV(" Cartesian 6-element position and velocity (X, Y, Z, XD, YD, ZD)",
CCSDSUnit.KM, CCSDSUnit.KM, CCSDSUnit.KM,
CCSDSUnit.KM_S, CCSDSUnit.KM_S, CCSDSUnit.KM_S),
/** Cartesian 9-element position, velocity and acceleration (X, Y, Z, XD, YD, ZD, XDD, YDD, ZDD). */
CARTPVA("Cartesian 9-element position, velocity and acceleration (X, Y, Z, XD, YD, ZD, XDD, YDD, ZDD)",
CCSDSUnit.KM, CCSDSUnit.KM, CCSDSUnit.KM,
CCSDSUnit.KM_S, CCSDSUnit.KM_S, CCSDSUnit.KM_S,
CCSDSUnit.KM_S2, CCSDSUnit.KM_S2, CCSDSUnit.KM_S2),
/** Delaunay elements (L, G, H, l, g, h). */
DELAUNAY("Delaunay elements (L, G, H, l, g, h)",
CCSDSUnit.KM2_S, CCSDSUnit.KM2_S, CCSDSUnit.KM2_S,
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG),
/** Modified Delaunay elements (Lm, Gm, Hm, lm, gm, hm). */
DELAUNAYMOD("Delaunay elements (Lm, Gm, Hm, lm, gm, hm)",
CCSDSUnit.SQKM, CCSDSUnit.SQKM, CCSDSUnit.SQKM,
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG),
/** 12 elements eigenvalue/eigenvectors (EigMaj, EigMed, EigMin, EigVecMaj, EigVecMed, EigVecMin). */
EIGVAL3EIGVEC3("12 elements eigenvalue/eigenvectors (EigMaj, EigMed, EigMin, EigVecMaj, EigVecMed, EigVecMin)",
CCSDSUnit.KM, CCSDSUnit.KM, CCSDSUnit.KM,
CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS),
/** Equinoctial elements (a, af, ag, L=M+ω+frΩ, χ, ψ, fr). */
EQUINOCTIAL(" Equinoctial elements (a, af, ag, L=M+ω+frΩ, χ, ψ, fr)",
CCSDSUnit.KM, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DEG, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DIMENSIONLESS),
/** Modified equinoctial elements (p=a(1−e²), af, ag, L'=υ+ω+frΩ, χ, ψ, fr). */
EQUINOCTIALMOD("Modified equinoctial elements (p=a(1−e²), af, ag, L'=υ+ω+frΩ, χ, ψ, fr)",
CCSDSUnit.KM, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DEG, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DIMENSIONLESS),
/** Geodetic elements (λ, ΦGD, β, A, h, vre). */
GEODETIC("Geodetic elements (λ, ΦGD, β, A, h, vre)",
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG,
CCSDSUnit.DEG, CCSDSUnit.KM, CCSDSUnit.KM_S),
/** Keplerian 6-elemnt classical set (a, e, i, Ω, ω, ν). */
KEPLERIAN("Keplerian 6-elemnt classical set (a, e, i, Ω, ω, ν)",
CCSDSUnit.KM, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DEG,
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG),
/** Keplerian 6-elemnt classical set (a, e, i, Ω, ω, M). */
KEPLERIANMEAN("Keplerian 6-elemnt classical set (a, e, i, Ω, ω, M)",
CCSDSUnit.KM, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DEG,
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG),
/** Modified spherical 6-element set (λ, δ, β, A, r, v). */
LDMARV(" Modified spherical 6-element set (λ, δ, β, A, r, v)",
CCSDSUnit.DEG, CCSDSUnit.DEG, CCSDSUnit.DEG,
CCSDSUnit.DEG, CCSDSUnit.KM, CCSDSUnit.KM_S),
/** Geosynchronous on-station tailored set (a, ex, ey, ix, iy, λ). */
ONSTATION("Geosynchronous on-station tailored set (a, ex, ey, ix, iy, λ)",
CCSDSUnit.KM, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS,
CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DIMENSIONLESS, CCSDSUnit.DEG),
/** Canonical counterpart of equinoctial 6-element set (λM=M+ω+Ω, gp, hp, Lp, Gp, Hp). */
POINCARE("Canonical counterpart of equinoctial 6-element set (λM=M+ω+Ω, gp, hp, Lp, Gp, Hp)",
CCSDSUnit.DEG, CCSDSUnit.KM_SQS, CCSDSUnit.KM_SQS,
CCSDSUnit.KM2_S, CCSDSUnit.KM_SQS, CCSDSUnit.KM_SQS);
/** Description. */
private final String description;
/** Elements units. */
private final CCSDSUnit[] units;
/** Simple constructor.
* @param description description
* @param units elements units
*/
CCSDSElementsType(final String description, final CCSDSUnit... units) {
this.description = description;
this.units = units.clone();
}
/** Get the elements units.
* @return elements units
*/
public CCSDSUnit[] getUnits() {
return units.clone();
}
/** {@inheritDoc} */
@Override
public String toString() {
return description;
}
}
/* Copyright 2002-2019 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (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.
*/
package org.orekit.files.ccsds;
/** Basis of orbit state time history data {@link OCMFile Orbit Comprehensive Messages}.
* @author Luc Maisonobe
* @since 10.1
*/
public enum CCSDSOrbitBasis {
/** Predicted. */
PREDICTED("Predicted"),
/** Estimated from orbit determination. */
DETERMINED_OD("Estimated from orbit determination"),
/** Estimated from telemetry. */
DETERMINED_TLM("Estimated from telemetry"),
/** Hypothetical. */
HYPOTHETICAL("Hypothetical");
/** Description. */
private final String description;
/** Simple constructor.
* @param description description
*/
CCSDSOrbitBasis(final String description) {
this.description = description;
}
/** {@inheritDoc} */
@Override
public String toString() {
return description;
}
}
/* Copyright 2002-2019 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (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.
*/
package org.orekit.files.ccsds;
import org.hipparchus.util.FastMath;
/** CCSDS/SANA units (km, km/s, degrees...).
* @author Luc Maisonobe
* @since 10.1
*/
public enum CCSDSUnit {
/** Kilometers. */
KM() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * 1000.0;
}
},
/** Kilometers per seconds. */
KM_S() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * 1000.0;
}
},
/** Kilometers per squared seconds. */
KM_S2() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * 1000.0;
}
},
/** Square kilometers. */
KM2() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * 1000000.0;
}
},
/** Square kilometers per second. */
KM2_S() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * 1000000.0;
}
},
/** Kilometers square roots. */
SQKM() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * FastMath.sqrt(1000.0);
}
},
/** Kilometers per seconds square roots. */
KM_SQS() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value * 1000.0;
}
},
/** Degrees. */
DEG() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return FastMath.toRadians(value);
}
},
/** Dimensionless values. */
DIMENSIONLESS() {
/** {@inheritDoc} */
@Override
public double toSI(final double value) {
return value;
}
};
/** Convert a value from CCSDS/SANA units to SI units.
* @param value value in CCSDS/SANA units
* @return value in SI units
*/
public abstract double toSI(double value);
}
......@@ -192,4 +192,17 @@ public enum CcsdsTimeScale {
return false;
}
/** Parse a value from a key=value entry.
* @param value value to parse
* @return CCSDS time system corresponding to the value
*/
public static CcsdsTimeScale parse(final String value) {
for (final CcsdsTimeScale scale : values()) {
if (scale.name().equals(value)) {
return scale;
}
}
throw new OrekitException(OrekitMessages.CCSDS_TIME_SYSTEM_NOT_IMPLEMENTED, value);
}
}
......@@ -151,6 +151,14 @@ class KeyValue {
this.fileName = fileName;
}
/** Get the line where the keyword was found.
* @return line where the keyword was found
* @since 10.1
*/
public String getLine() {
return line;
}
/** Keyword corresponding to the parsed key.
* @return keyword corresponding to the parsed key
* (null if not recognized)
......
......@@ -307,6 +307,60 @@ public enum Keyword {
* @since 10.0
*/
ORB_STOP,
/** Orbit identification number.
* @since 10.0
*/
ORB_ID,
/** Identification number of previous orbit.
* @since 10.0
*/
ORB_PREV_ID,
/** Identification number of next orbit.
* @since 10.0
*/
ORB_NEXT_ID,
/** Basis of this orbit state time history data.
* @see CCSDSOrbitBasis
* @since 10.0
*/
ORB_BASIS,
/** Identification number of the orbit determination or simulation upon which this orbit is based.
* @since 10.0
*/
ORB_BASIS_ID,
/** Type of averaging (Osculating, mean Brouwer, other...).
* @since 10.0
*/
ORB_AVERAGING,
/** Reference epoch for all relative times in the orbit state block.
* @since 10.0
*/
ORB_EPOCH_TZERO,
/** Time system for {@link #ORB_EPOCH_TZERO}.
* @since 10.0
*/
ORB_TIME_SYSTEM,
/** Reference frame of the orbit.
* @since 10.0
*/
ORB_REF_FRAME,
/** Epoch of the {@link #ORB_REF_FRAME orbit reference frame}.
* @since 10.0
*/
ORB_FRAME_EPOCH,
/** Orbit element set type.
* @see CCSDSElementsType
* @since 10.0
*/
ORB_TYPE,
/** Number of elements (excluding time) contain in the element set.
* @since 10.0
*/
ORB_N,
/** Definition of orbit elements.
* @since 10.0
*/
ORB_ELEMENTS,
/** Start of object physical characteristics data section.
* @since 10.0
*/
......
......@@ -335,13 +335,7 @@ public abstract class ODMParser {
return true;
case TIME_SYSTEM:
if (!CcsdsTimeScale.contains(keyValue.getValue())) {
throw new OrekitException(
OrekitMessages.CCSDS_TIME_SYSTEM_NOT_IMPLEMENTED,
keyValue.getValue());
}
final CcsdsTimeScale timeSystem =
CcsdsTimeScale.valueOf(keyValue.getValue());
final CcsdsTimeScale timeSystem = CcsdsTimeScale.parse(keyValue.getValue());
metaData.setTimeSystem(timeSystem);
if (metaData.getFrameEpochString() != null) {
metaData.setFrameEpoch(parseDate(metaData.getFrameEpochString(), timeSystem));
......
......@@ -395,12 +395,7 @@ public class TDMParser extends DefaultHandler {
switch (keyValue.getKeyword()) {
case TIME_SYSTEM:
// Read the time system and ensure that it is supported by Orekit
if (!CcsdsTimeScale.contains(keyValue.getValue())) {
throw new OrekitException(OrekitMessages.CCSDS_TIME_SYSTEM_NOT_IMPLEMENTED,
keyValue.getValue());
}
final CcsdsTimeScale timeSystem =
CcsdsTimeScale.valueOf(keyValue.getValue());
final CcsdsTimeScale timeSystem = CcsdsTimeScale.parse(keyValue.getValue());
metaData.setTimeSystem(timeSystem);
// Convert start/stop time to AbsoluteDate if they have been read already
......
......@@ -17,9 +17,11 @@
package org.orekit.files.ccsds;
import java.net.URISyntaxException;
import java.util.List;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.orekit.Utils;
import org.orekit.errors.OrekitException;
......@@ -102,7 +104,9 @@ public class OCMParserTest {
@Test
public void testParseOCM1() {
final String ex = "/ccsds/OCMExample1.txt";
final OCMFile file = new OCMParser().parse(getClass().getResourceAsStream(ex),
final OCMFile file = new OCMParser().
withConventions(IERSConventions.IERS_2010).
parse(getClass().getResourceAsStream(ex),
ex.substring(ex.lastIndexOf('/') + 1));
// check the default values that are not set in this simple file
......@@ -116,22 +120,72 @@ public class OCMParserTest {
Assert.assertEquals(new AbsoluteDate(1998, 11, 06, 9, 23, 57, TimeScalesFactory.getUTC()),
file.getCreationDate());
// OCM is the only message for which ORIGINATOR, OBJECT_NAME, OBJECT_ID,
// OCM is the only message for which OBJECT_NAME, OBJECT_ID,
// CENTER_NAME and REF_FRAME are not mandatory, they are not present in this minimal file
Assert.assertNull(file.getOriginator());
Assert.assertNull(file.getMetaData().getObjectName());
Assert.assertNull(file.getMetaData().getObjectID());
Assert.assertNull(file.getMetaData().getCenterName());
Assert.assertNull(file.getMetaData().getRefFrame());
Assert.assertEquals(new AbsoluteDate(1998, 12, 18, 14, 28, 15.1172, TimeScalesFactory.getUTC()),
file.getMetaData().getDefEpochT0());
Assert.assertEquals("JPL", file.getOriginator());
final AbsoluteDate t0 = new AbsoluteDate(1998, 12, 18, 14, 28, 15.1172, TimeScalesFactory.getUTC());
Assert.assertEquals(t0, file.getMetaData().getDefEpochT0());
Assert.assertEquals(TimeScalesFactory.getUTC(), file.getMetaData().getDefTimeSystem().getTimeScale(null));
// TODO test orbit data
// orbit data
Assert.assertEquals(1, file.getOrbitStateTimeHistories().size());
OCMFile.OrbitStateHistory history = file.getOrbitStateTimeHistories().get(0);
Assert.assertEquals("intervening data records omitted between DT=20.0 and DT=500.0", history.getComment().get(0));
Assert.assertEquals("OSCULATING", history.getOrbAveraging());
Assert.assertEquals("EARTH", history.getCenterName());
Assert.assertEquals(CCSDSFrame.ITRF2000, history.getOrbRefFrame());
Assert.assertEquals(CCSDSElementsType.CARTPV, history.getOrbType());
Assert.assertEquals(0.0, history.getOrbEpochT0().durationFrom(t0), 1.0e-15);
Assert.assertEquals(file.getMetaData().getDefTimeSystem(), history.getOrbTimeSystem());
List<OCMFile.OrbitalState> states = history.getOrbitalStates();
Assert.assertEquals(4, states.size());
Assert.assertEquals(0.0, states.get(0).getDate().durationFrom(t0), 1.0e-15);
Assert.assertEquals(6, states.get(0).getElements().length);
Assert.assertEquals( 2789600.0, states.get(0).getElements()[0], 1.0e-15);
Assert.assertEquals( -280000.0, states.get(0).getElements()[1], 1.0e-15);
Assert.assertEquals(-1746800.0, states.get(0).getElements()[2], 1.0e-15);
Assert.assertEquals( 4730.0, states.get(0).getElements()[3], 1.0e-15);
Assert.assertEquals( -2500.0, states.get(0).getElements()[4], 1.0e-15);
Assert.assertEquals( -1040.0, states.get(0).getElements()[5], 1.0e-15);
Assert.assertEquals(10.0, states.get(1).getDate().durationFrom(t0), 1.0e-15);
Assert.assertEquals(6, states.get(1).getElements().length);
Assert.assertEquals( 2783400.0, states.get(1).getElements()[0], 1.0e-15);
Assert.assertEquals( -308100.0, states.get(1).getElements()[1], 1.0e-15);
Assert.assertEquals(-1877100.0, states.get(1).getElements()[2], 1.0e-15);
Assert.assertEquals( 5190.0, states.get(1).getElements()[3], 1.0e-15);
Assert.assertEquals( -2420.0, states.get(1).getElements()[4], 1.0e-15);
Assert.assertEquals( -2000.0, states.get(1).getElements()[5], 1.0e-15);
Assert.assertEquals(20.0, states.get(2).getDate().durationFrom(t0), 1.0e-15);
Assert.assertEquals(6, states.get(2).getElements().length);
Assert.assertEquals( 2776000.0, states.get(2).getElements()[0], 1.0e-15);
Assert.assertEquals( -336900.0, states.get(2).getElements()[1], 1.0e-15);
Assert.assertEquals(-2008700.0, states.get(2).getElements()[2], 1.0e-15);
Assert.assertEquals( 5640.0, states.get(2).getElements()[3], 1.0e-15);
Assert.assertEquals( -2340.0, states.get(2).getElements()[4], 1.0e-15);
Assert.assertEquals( -1950.0, states.get(2).getElements()[5], 1.0e-15);
Assert.assertEquals(500.0, states.get(3).getDate().durationFrom(t0), 1.0e-15);
Assert.assertEquals(6, states.get(3).getElements().length);
Assert.assertEquals( 2164375.0, states.get(3).getElements()[0], 1.0e-15);
Assert.assertEquals( 1115811.0, states.get(3).getElements()[1], 1.0e-15);
Assert.assertEquals( -688131.0, states.get(3).getElements()[2], 1.0e-15);
Assert.assertEquals( -3533.28, states.get(3).getElements()[3], 1.0e-15);
Assert.assertEquals( -2884.52, states.get(3).getElements()[4], 1.0e-15);
Assert.assertEquals( 885.35, states.get(3).getElements()[5], 1.0e-15);
}
// temporarily ignore the test as reference frame EFG is not available
@Ignore
@Test
public void testParseOCM2() {
final String ex = "/ccsds/OCMExample2.txt";
......@@ -174,12 +228,14 @@ public class OCMParserTest {
@Test
public void testParseOCM3() {
final String ex = "/ccsds/OCMExample3.txt";
final OCMFile file = new OCMParser().parse(getClass().getResourceAsStream(ex),
final OCMFile file = new OCMParser().
withConventions(IERSConventions.IERS_2010).
parse(getClass().getResourceAsStream(ex),
ex.substring(ex.lastIndexOf('/') + 1));
// Check Header Block;
Assert.assertEquals(3.0, file.getFormatVersion(), 1.0e-10);
Assert.assertNull(file.getMetaDataComment());
Assert.assertEquals(0, file.getMetaDataComment().size());
Assert.assertEquals(new AbsoluteDate(1998, 11, 06, 9, 23, 57, TimeScalesFactory.getUTC()),
file.getCreationDate());
......
CCSDS_OCM_VERS = 3.0
CREATION_DATE = 1998-11-06T09:23:57
META_START
ORIGINATOR = JPL
DEF_EPOCH_TZERO = 1998-12-18T14:28:15.1172
DEF_TIME_SYSTEM = UTC
META_STOP
ORB_START
COMMENT intervening data records omitted between DT=20.0 and DT=500.0
DT=0.0 2789.6 -280.0 -1746.8 4.73 -2.50 -1.04
T=1998-12-18T14:28:25.1172 2783.4 -308.1 -1877.1 5.19 -2.42 -2.00
DT=20.0 2776.0 -336.9 -2008.7 5.64 -2.34 -1.95
COMMENT < intervening data records omitted here >
DT=500.0 2164.375 1115.811 -688.131 -3.53328 -2.88452 0.88535
ORB_STOP
......@@ -2,20 +2,21 @@ CCSDS_OCM_VERS = 3.0
CREATION_DATE = 1998-11-06T09:23:57
META_START
ORIGINATOR = ESOC
DEF_EPOCH_TZERO = 1998-12-18T14:28:15.1172
DEF_TIME_SYSTEM = UTC
META_STOP
ORB_START
COMMENT ORBIT EPHEMERIS INCORPORATING DEPLOYMENTS AND MANEUVERS (BELOW)
COMMENT intervening data records omitted after DT=20.0
ORB_REF_FRAME = TOD
ORB_FRAME_EPOCH = 1998-12-18T14:28:15.1172
ORB_TYPE = CARTPVA
DT=0.000000 2789.6 -280.0 -1746.8 4.73 -2.50 -1.04 0.008 0.001 -0.159
DT=10.000000 2783.4 -308.1 -1877.1 5.19 -2.42 -2.00 0.008 0.001 0.001
DT=20.000000 2776.0 -336.9 -2008.7 5.64 -2.34 -1.95 0.008 0.001 0.159
COMMENT < intervening data records omitted here >
T=1998-12-18T14:36:35.1172 2164.375 1115.811 -688.131 -3.53328 -2.88452 0.88535
T=1998-12-18T14:36:35.1172 2164.375 1115.811 -688.131 -3.53328 -2.88452 0.88535 0.0 0.0 0.0
ORB_STOP
PHYS_START
......
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