CelestialBodyFrame.java
/* Copyright 2002-2023 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.
*/
package org.orekit.files.ccsds.definitions;
import java.util.regex.Pattern;
import org.orekit.bodies.CelestialBodyFactory;
import org.orekit.data.DataContext;
import org.orekit.errors.OrekitException;
import org.orekit.errors.OrekitInternalError;
import org.orekit.errors.OrekitMessages;
import org.orekit.frames.Frame;
import org.orekit.frames.ITRFVersion;
import org.orekit.frames.VersionedITRF;
import org.orekit.utils.IERSConventions;
/** Frames used in CCSDS Orbit Data Messages.
* @author Steven Ports
* @since 6.1
*/
public enum CelestialBodyFrame {
/** Earth Mean Equator and Equinox of J2000. */
EME2000 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return dataContext.getFrames().getEME2000();
}
},
/** Earth Mean Equator and Equinox of J2000. */
J2000 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return dataContext.getFrames().getEME2000();
}
},
/** Geocentric Celestial Reference Frame. */
GCRF {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return dataContext.getFrames().getGCRF();
}
},
/** Greenwich Rotating Coordinates. */
GRC {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRFEquinox(conventions, simpleEOP);
}
},
/** Greenwich True Of Date.
* @since 11.0
*/
GTOD {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getGTOD(conventions, simpleEOP);
}
},
/** International Celestial Reference Frame. */
ICRF {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return dataContext.getFrames().getICRF();
}
},
/** Latest International Terrestrial Reference Frame. */
ITRF {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return ITRF2020.getFrame(conventions, simpleEOP, dataContext);
}
},
/** International Terrestrial Reference Frame 2020. */
ITRF2020 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_2020, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 2014. */
ITRF2014 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_2014, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 2008. */
ITRF2008 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_2008, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 2005. */
ITRF2005 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_2005, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 2000. */
ITRF2000 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_2000, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1997. */
ITRF1997 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1997, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1996. */
ITRF1996 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1996, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1994. */
ITRF1994 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1994, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1993. */
ITRF1993 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1993, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1992. */
ITRF1992 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1992, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1991. */
ITRF1991 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1991, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1990. */
ITRF1990 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1990, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1989. */
ITRF1989 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1989, conventions, simpleEOP);
}
},
/** International Terrestrial Reference Frame 1988. */
ITRF1988 {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getITRF(ITRFVersion.ITRF_1988, conventions, simpleEOP);
}
},
/** Mars Centered Inertial. */
MCI {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return dataContext.getCelestialBodies().getMars().getInertiallyOrientedFrame();
}
},
/** True of Date, Rotating. */
TDR {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getGTOD(conventions, simpleEOP);
}
},
/**
* True Equator Mean Equinox.
* TEME may be used only for OMMs based on NORAD
* Two Line Element sets, and in no other circumstances.
*/
TEME {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
return dataContext.getFrames().getTEME();
}
},
/** True of Date. */
TOD {
/** {@inheritDoc} */
@Override
public Frame getFrame(final IERSConventions conventions,
final boolean simpleEOP,
final DataContext dataContext) {
if (conventions == null) {
throw new OrekitException(OrekitMessages.CCSDS_UNKNOWN_CONVENTIONS);
}
return dataContext.getFrames().getTOD(conventions, simpleEOP);
}
};
/** Pattern for dash. */
private static final Pattern DASH = Pattern.compile("-");
/** Suffix of the name of the inertial frame attached to a planet. */
private static final String INERTIAL_FRAME_SUFFIX = "/inertial";
/** Substring common to all ITRF frames. */
private static final String ITRF_SUBSTRING = "ITRF";
/**
* Get the frame corresponding to the CCSDS constant.
* @param conventions IERS conventions to use
* @param simpleEOP if true, tidal effects are ignored when interpolating EOP
* @param dataContext to use when creating the frame.
* @return frame corresponding to the CCSDS constant
* @since 10.1
*/
public abstract Frame getFrame(IERSConventions conventions, boolean simpleEOP, DataContext dataContext);
/**
* Get the name of celestial body frame.
* @return the name of celestial body frame
* @since 11.1
*/
public String getName() {
return name();
}
/** Parse a CCSDS frame.
* @param frameName name of the frame, as the value of a CCSDS key=value line
* @return CCSDS frame corresponding to the name
*/
public static CelestialBodyFrame parse(final String frameName) {
String canonicalized = DASH.matcher(frameName).replaceAll("");
if (canonicalized.startsWith(ITRF_SUBSTRING) && canonicalized.length() > 4) {
final int year = Integer.parseInt(canonicalized.substring(4));
if (year > 87 && year < 100) {
// convert two-digits specifications like ITRF97 into ITRF1997
canonicalized = ITRF_SUBSTRING + (year + 1900);
}
}
return CelestialBodyFrame.valueOf(canonicalized);
}
/**
* Map an Orekit frame to a CCSDS frame.
*
* <p> The goal of this method is to perform the opposite mapping of {@link
* #getFrame(IERSConventions, boolean, DataContext)}.
*
* @param frame a reference frame.
* @return the CCSDSFrame corresponding to the Orekit frame
*/
public static CelestialBodyFrame map(final Frame frame) {
// Try to determine the CCSDS name from Annex A by examining the Orekit name.
final String name = frame.getName();
try {
// should handle J2000, GCRF, TEME, and some frames created by OEMParser.
return CelestialBodyFrame.valueOf(name);
} catch (IllegalArgumentException iae) {
if (frame instanceof ModifiedFrame) {
return ((ModifiedFrame) frame).getRefFrame();
} else if ((CelestialBodyFactory.MARS + INERTIAL_FRAME_SUFFIX).equals(name)) {
return MCI;
} else if ((CelestialBodyFactory.SOLAR_SYSTEM_BARYCENTER + INERTIAL_FRAME_SUFFIX).equals(name)) {
return ICRF;
} else if (name.contains("GTOD")) {
return GTOD;
} else if (name.contains("TOD")) { // check after GTOD
return TOD;
} else if (name.contains("Equinox") && name.contains(ITRF_SUBSTRING)) {
return GRC;
} else if (frame instanceof VersionedITRF) {
try {
final ITRFVersion itrfVersion = ((VersionedITRF) frame).getITRFVersion();
return CelestialBodyFrame.valueOf(itrfVersion.name().replace("_", ""));
} catch (IllegalArgumentException iae2) {
// this should never happen
throw new OrekitInternalError(iae2);
}
} else if (name.contains("CIO") && name.contains(ITRF_SUBSTRING)) {
return ITRF2014;
}
throw new OrekitException(iae, OrekitMessages.CCSDS_INVALID_FRAME, name);
}
}
/**
* Guesses names from ODM Table 5-3 and Annex A.
*
* <p> The goal of this method is to perform the opposite mapping of {@link
* #getFrame(IERSConventions, boolean, DataContext)}.
*
* @param frame a reference frame.
* @return the string to use in the OEM file to identify {@code frame}.
*/
public static String guessFrame(final Frame frame) {
try {
return map(frame).name();
} catch (OrekitException oe) {
// we were unable to find a match
return frame.getName();
}
}
}