diff --git a/src/tutorials/java/fr/cs/examples/DirectLocation.java b/src/tutorials/java/fr/cs/examples/DirectLocation.java
new file mode 100644
index 0000000000000000000000000000000000000000..b7bc78bdc327e2c57ae2bf4e56ce66b70aaaae0d
--- /dev/null
+++ b/src/tutorials/java/fr/cs/examples/DirectLocation.java
@@ -0,0 +1,177 @@
+/* Copyright 2013-2015 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 fr.cs.examples;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import org.apache.commons.math3.geometry.euclidean.threed.Rotation;
+import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
+import org.apache.commons.math3.util.FastMath;
+import org.orekit.bodies.GeodeticPoint;
+import org.orekit.data.DataProvidersManager;
+import org.orekit.data.DirectoryCrawler;
+import org.orekit.errors.OrekitException;
+import org.orekit.frames.Frame;
+import org.orekit.frames.FramesFactory;
+import org.orekit.frames.Transform;
+import org.orekit.rugged.api.AlgorithmId;
+import org.orekit.rugged.api.BodyRotatingFrameId;
+import org.orekit.rugged.api.EllipsoidId;
+import org.orekit.rugged.api.InertialFrameId;
+import org.orekit.rugged.api.Rugged;
+import org.orekit.rugged.api.RuggedBuilder;
+import org.orekit.rugged.errors.RuggedException;
+import org.orekit.rugged.linesensor.LineSensor;
+import org.orekit.rugged.linesensor.LinearLineDatation;
+import org.orekit.rugged.los.LOSBuilder;
+import org.orekit.rugged.los.FixedRotation;
+import org.orekit.rugged.los.TimeDependentLOS;
+import org.orekit.rugged.utils.ParameterType;
+import org.orekit.time.AbsoluteDate;
+import org.orekit.time.TimeScale;
+import org.orekit.time.TimeScalesFactory;
+import org.orekit.utils.AngularDerivativesFilter;
+import org.orekit.utils.CartesianDerivativesFilter;
+import org.orekit.utils.IERSConventions;
+import org.orekit.utils.PVCoordinates;
+import org.orekit.utils.TimeStampedAngularCoordinates;
+import org.orekit.utils.TimeStampedPVCoordinates;
+
+public class DirectLocation {
+
+    public static void main(String[] args) {
+
+        try {
+
+            // Initialize Orekit, assuming an orekit-data folder is in user home directory
+            File home       = new File(System.getProperty("user.home"));
+            File orekitData = new File(home, "orekit-data");
+            DataProvidersManager.getInstance().addProvider(new DirectoryCrawler(orekitData));
+
+            // The raw viewing direction of pixel i with respect to the instrument is defined by the vector:
+            List<Vector3D> rawDirs = new ArrayList<Vector3D>();
+            for (int i = 0; i < 2000; i++) {
+                //20° field of view, 2000 pixels
+                rawDirs.add(new Vector3D(0d, i*FastMath.toRadians(20)/2000d, 1d));
+            }
+
+            // The instrument is oriented 10° off nadir around the X-axis, we need to rotate the viewing
+            // direction to obtain the line of sight in the satellite frame
+            LOSBuilder losBuilder = new LOSBuilder(rawDirs);
+            losBuilder.addTransform(new FixedRotation(ParameterType.FIXED, Vector3D.PLUS_I, FastMath.toRadians(10)));
+
+            TimeDependentLOS lineOfSight = losBuilder.build();
+
+            // We use Orekit for handling time and dates, and Rugged for defining the datation model:
+            TimeScale gps = TimeScalesFactory.getGPS();
+            AbsoluteDate absDate = new AbsoluteDate("2009-12-11T16:59:30.0", gps);
+            LinearLineDatation lineDatation = new LinearLineDatation(absDate, 1d, 20); 
+
+            // With the LOS and the datation now defined , we can initialize a line sensor object in Rugged:
+            LineSensor lineSensor = new LineSensor("mySensor", lineDatation, Vector3D.ZERO, lineOfSight);
+
+            // In our application, we simply need to know the name of the frames we are working with. Positions and
+            // velocities are given in the ITRF terrestrial frame, while the quaternions are given in EME2000
+            // inertial frame.  
+            Frame eme2000 = FramesFactory.getEME2000();
+            boolean simpleEOP = true; // we don't want to compute tiny tidal effects at millimeter level
+            Frame itrf = FramesFactory.getITRF(IERSConventions.IERS_2010, simpleEOP);
+
+            ArrayList<TimeStampedAngularCoordinates> satelliteQList = new ArrayList<TimeStampedAngularCoordinates>();
+            ArrayList<TimeStampedPVCoordinates> satellitePVList = new ArrayList<TimeStampedPVCoordinates>();
+
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:58:42.592937", -0.340236d, 0.333952d, -0.844012d, -0.245684d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:59:06.592937", -0.354773d, 0.329336d, -0.837871d, -0.252281d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:59:30.592937", -0.369237d, 0.324612d, -0.831445d, -0.258824d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:59:54.592937", -0.3836d, 0.319792d, -0.824743d, -0.265299d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:00:18.592937", -0.397834d, 0.314883d, -0.817777d, -0.271695d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:00:42.592937", -0.411912d, 0.309895d, -0.810561d, -0.278001d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:01:06.592937", -0.42581d, 0.304838d, -0.803111d, -0.284206d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:01:30.592937", -0.439505d, 0.299722d, -0.795442d, -0.290301d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:01:54.592937", -0.452976d, 0.294556d, -0.787571d, -0.296279d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:02:18.592937", -0.466207d, 0.28935d, -0.779516d, -0.302131d);
+
+
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:58:42.592937", -726361.466d, -5411878.485d, 4637549.599d, -2068.995d, -4500.601d, -5576.736d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:59:04.192937", -779538.267d, -5506500.533d, 4515934.894d, -2058.308d, -4369.521d, -5683.906d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:59:25.792937", -832615.368d, -5598184.195d, 4392036.13d, -2046.169d, -4236.279d, -5788.201d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:59:47.392937", -885556.748d, -5686883.696d, 4265915.971d, -2032.579d, -4100.944d, -5889.568d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:00:08.992937", -938326.32d, -5772554.875d, 4137638.207d, -2017.537d, -3963.59d, -5987.957d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:00:30.592937", -990887.942d, -5855155.21d, 4007267.717d, -2001.046d, -3824.291d, -6083.317d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:00:52.192937", -1043205.448d, -5934643.836d, 3874870.441d, -1983.107d, -3683.122d, -6175.6d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:01:13.792937", -1095242.669d, -6010981.571d, 3740513.34d, -1963.723d, -3540.157d, -6264.76d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:01:35.392937", -1146963.457d, -6084130.93d, 3604264.372d, -1942.899d, -3395.473d, -6350.751d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:01:56.992937", -1198331.706d, -6154056.146d, 3466192.446d, -1920.64d, -3249.148d, -6433.531d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:02:18.592937", -1249311.381d, -6220723.191d, 3326367.397d, -1896.952d, -3101.26d, -6513.056d);
+
+            Rugged rugged = new RuggedBuilder().
+                    setAlgorithm(AlgorithmId.IGNORE_DEM_USE_ELLIPSOID). 
+                    setEllipsoid(EllipsoidId.WGS84, BodyRotatingFrameId.ITRF).
+                    setTimeSpan(absDate, absDate.shiftedBy(60.0), 0.01, 5 / lineSensor.getRate(0)). 
+                    setTrajectory(InertialFrameId.EME2000,
+                                  satellitePVList, 4, CartesianDerivativesFilter.USE_P,
+                                  satelliteQList,  4,  AngularDerivativesFilter.USE_R).
+                                  addLineSensor(lineSensor).
+                                  build();
+
+            Vector3D position = lineSensor.getPosition(); // This returns a zero vector since we set the relative position of the sensor w.r.T the satellite to 0.
+            AbsoluteDate firstLineDate = lineSensor.getDate(0);
+            Vector3D los = lineSensor.getLos(firstLineDate, 0);
+            GeodeticPoint upLeftPoint = rugged.directLocation(firstLineDate, position, los);
+            System.out.format(Locale.US, "upper left point: φ = %8.3f °, λ = %8.3f °, h = %8.3f m%n",
+                              FastMath.toDegrees(upLeftPoint.getLatitude()),
+                              FastMath.toDegrees(upLeftPoint.getLongitude()),
+                              upLeftPoint.getAltitude());
+
+        } catch (OrekitException oe) {
+            System.err.println(oe.getLocalizedMessage());
+            System.exit(1);
+        } catch (RuggedException re) {
+            System.err.println(re.getLocalizedMessage());
+            System.exit(1);
+        }
+
+    }
+
+    private static void addSatellitePV(TimeScale gps, Frame eme2000, Frame itrf,
+                                  ArrayList<TimeStampedPVCoordinates> satellitePVList,
+                                  String absDate,
+                                  double px, double py, double pz, double vx, double vy, double vz)
+        throws OrekitException {
+        AbsoluteDate ephemerisDate = new AbsoluteDate(absDate, gps);
+        Vector3D position = new Vector3D(px, py, pz);
+        Vector3D velocity = new Vector3D(vx, vy, vz);
+        PVCoordinates pvITRF = new PVCoordinates(position, velocity);
+        Transform transform = itrf.getTransformTo(eme2000, ephemerisDate);
+        Vector3D pEME2000 = transform.transformPosition(pvITRF.getPosition());
+        Vector3D vEME2000 = transform.transformVector(pvITRF.getVelocity());
+        satellitePVList.add(new TimeStampedPVCoordinates(ephemerisDate, pEME2000, vEME2000, Vector3D.ZERO));
+    }
+
+    private static void addSatelliteQ(TimeScale gps, ArrayList<TimeStampedAngularCoordinates> satelliteQList, String absDate,
+                                      double q0, double q1, double q2, double q3) {
+        AbsoluteDate attitudeDate = new AbsoluteDate(absDate, gps);
+        Rotation rotation = new Rotation(q0, q1, q2, q3, true);
+        TimeStampedAngularCoordinates pair =
+                new TimeStampedAngularCoordinates(attitudeDate, rotation, Vector3D.ZERO, Vector3D.ZERO);
+        satelliteQList.add(pair);
+    }
+
+}
diff --git a/src/tutorials/java/fr/cs/examples/DirectLocationWithDEM.java b/src/tutorials/java/fr/cs/examples/DirectLocationWithDEM.java
new file mode 100644
index 0000000000000000000000000000000000000000..b25015d11a1deb6289ca82a744fc1b6d3c19acd9
--- /dev/null
+++ b/src/tutorials/java/fr/cs/examples/DirectLocationWithDEM.java
@@ -0,0 +1,226 @@
+/* Copyright 2013-2015 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 fr.cs.examples;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import org.apache.commons.math3.geometry.euclidean.threed.Rotation;
+import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
+import org.apache.commons.math3.util.FastMath;
+import org.orekit.bodies.GeodeticPoint;
+import org.orekit.data.DataProvidersManager;
+import org.orekit.data.DirectoryCrawler;
+import org.orekit.errors.OrekitException;
+import org.orekit.frames.Frame;
+import org.orekit.frames.FramesFactory;
+import org.orekit.frames.Transform;
+import org.orekit.rugged.api.AlgorithmId;
+import org.orekit.rugged.api.BodyRotatingFrameId;
+import org.orekit.rugged.api.EllipsoidId;
+import org.orekit.rugged.api.InertialFrameId;
+import org.orekit.rugged.api.Rugged;
+import org.orekit.rugged.api.RuggedBuilder;
+import org.orekit.rugged.errors.RuggedException;
+import org.orekit.rugged.linesensor.LineSensor;
+import org.orekit.rugged.linesensor.LinearLineDatation;
+import org.orekit.rugged.los.LOSBuilder;
+import org.orekit.rugged.los.FixedRotation;
+import org.orekit.rugged.los.TimeDependentLOS;
+import org.orekit.rugged.raster.TileUpdater;
+import org.orekit.rugged.raster.UpdatableTile;
+import org.orekit.rugged.utils.ParameterType;
+import org.orekit.time.AbsoluteDate;
+import org.orekit.time.TimeScale;
+import org.orekit.time.TimeScalesFactory;
+import org.orekit.utils.AngularDerivativesFilter;
+import org.orekit.utils.CartesianDerivativesFilter;
+import org.orekit.utils.Constants;
+import org.orekit.utils.IERSConventions;
+import org.orekit.utils.PVCoordinates;
+import org.orekit.utils.TimeStampedAngularCoordinates;
+import org.orekit.utils.TimeStampedPVCoordinates;
+
+public class DirectLocationWithDEM {
+
+    public static void main(String[] args) {
+
+        try {
+
+            // Initialize Orekit, assuming an orekit-data folder is in user home directory
+            File home       = new File(System.getProperty("user.home"));
+            File orekitData = new File(home, "orekit-data");
+            DataProvidersManager.getInstance().addProvider(new DirectoryCrawler(orekitData));
+
+            // The raw viewing direction of pixel i with respect to the instrument is defined by the vector:
+            List<Vector3D> rawDirs = new ArrayList<Vector3D>();
+            for (int i = 0; i < 2000; i++) {
+                //20° field of view, 2000 pixels
+                rawDirs.add(new Vector3D(0d, i*FastMath.toRadians(20)/2000d, 1d));
+            }
+
+            // The instrument is oriented 10° off nadir around the X-axis, we need to rotate the viewing
+            // direction to obtain the line of sight in the satellite frame
+            LOSBuilder losBuilder = new LOSBuilder(rawDirs);
+            losBuilder.addTransform(new FixedRotation(ParameterType.FIXED, Vector3D.PLUS_I, FastMath.toRadians(10)));
+
+            TimeDependentLOS lineOfSight = losBuilder.build();
+
+            // We use Orekit for handling time and dates, and Rugged for defining the datation model:
+            TimeScale gps = TimeScalesFactory.getGPS();
+            AbsoluteDate absDate = new AbsoluteDate("2009-12-11T16:59:30.0", gps);
+            LinearLineDatation lineDatation = new LinearLineDatation(absDate, 1d, 20); 
+
+            // With the LOS and the datation now defined , we can initialize a line sensor object in Rugged:
+            LineSensor lineSensor = new LineSensor("mySensor", lineDatation, Vector3D.ZERO, lineOfSight);
+
+            // In our application, we simply need to know the name of the frames we are working with. Positions and
+            // velocities are given in the ITRF terrestrial frame, while the quaternions are given in EME2000
+            // inertial frame.  
+            Frame eme2000 = FramesFactory.getEME2000();
+            boolean simpleEOP = true; // we don't want to compute tiny tidal effects at millimeter level
+            Frame itrf = FramesFactory.getITRF(IERSConventions.IERS_2010, simpleEOP);
+
+            ArrayList<TimeStampedAngularCoordinates> satelliteQList = new ArrayList<TimeStampedAngularCoordinates>();
+            ArrayList<TimeStampedPVCoordinates> satellitePVList = new ArrayList<TimeStampedPVCoordinates>();
+
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:58:42.592937", -0.340236d, 0.333952d, -0.844012d, -0.245684d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:59:06.592937", -0.354773d, 0.329336d, -0.837871d, -0.252281d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:59:30.592937", -0.369237d, 0.324612d, -0.831445d, -0.258824d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T16:59:54.592937", -0.3836d, 0.319792d, -0.824743d, -0.265299d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:00:18.592937", -0.397834d, 0.314883d, -0.817777d, -0.271695d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:00:42.592937", -0.411912d, 0.309895d, -0.810561d, -0.278001d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:01:06.592937", -0.42581d, 0.304838d, -0.803111d, -0.284206d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:01:30.592937", -0.439505d, 0.299722d, -0.795442d, -0.290301d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:01:54.592937", -0.452976d, 0.294556d, -0.787571d, -0.296279d);
+            addSatelliteQ(gps, satelliteQList, "2009-12-11T17:02:18.592937", -0.466207d, 0.28935d, -0.779516d, -0.302131d);
+
+
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:58:42.592937", -726361.466d, -5411878.485d, 4637549.599d, -2068.995d, -4500.601d, -5576.736d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:59:04.192937", -779538.267d, -5506500.533d, 4515934.894d, -2058.308d, -4369.521d, -5683.906d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:59:25.792937", -832615.368d, -5598184.195d, 4392036.13d, -2046.169d, -4236.279d, -5788.201d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T16:59:47.392937", -885556.748d, -5686883.696d, 4265915.971d, -2032.579d, -4100.944d, -5889.568d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:00:08.992937", -938326.32d, -5772554.875d, 4137638.207d, -2017.537d, -3963.59d, -5987.957d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:00:30.592937", -990887.942d, -5855155.21d, 4007267.717d, -2001.046d, -3824.291d, -6083.317d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:00:52.192937", -1043205.448d, -5934643.836d, 3874870.441d, -1983.107d, -3683.122d, -6175.6d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:01:13.792937", -1095242.669d, -6010981.571d, 3740513.34d, -1963.723d, -3540.157d, -6264.76d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:01:35.392937", -1146963.457d, -6084130.93d, 3604264.372d, -1942.899d, -3395.473d, -6350.751d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:01:56.992937", -1198331.706d, -6154056.146d, 3466192.446d, -1920.64d, -3249.148d, -6433.531d);
+            addSatellitePV(gps, eme2000, itrf, satellitePVList, "2009-12-11T17:02:18.592937", -1249311.381d, -6220723.191d, 3326367.397d, -1896.952d, -3101.26d, -6513.056d);
+
+            Rugged rugged = new RuggedBuilder().
+                    setAlgorithm(AlgorithmId.DUVENHAGE).
+                    setDigitalElevationModel(new VolcanicConeElevationUpdater(new GeodeticPoint(FastMath.toRadians(37.58),
+                                                                                                FastMath.toRadians(-96.95),
+                                                                                                2463.0),
+                                                                              FastMath.toRadians(30.0), 16.0,
+                                                                              FastMath.toRadians(1.0), 1201),
+
+                                             8).
+                    setEllipsoid(EllipsoidId.WGS84, BodyRotatingFrameId.ITRF).
+                    setTimeSpan(absDate, absDate.shiftedBy(60.0), 0.01, 5 / lineSensor.getRate(0)).
+                    setTrajectory(InertialFrameId.EME2000,
+                                  satellitePVList, 4, CartesianDerivativesFilter.USE_P,
+                                  satelliteQList,  4,  AngularDerivativesFilter.USE_R).
+                                  addLineSensor(lineSensor).
+                                  build();
+
+            Vector3D position = lineSensor.getPosition(); // This returns a zero vector since we set the relative position of the sensor w.r.T the satellite to 0.
+            AbsoluteDate firstLineDate = lineSensor.getDate(0);
+            Vector3D los = lineSensor.getLos(firstLineDate, 0);
+            GeodeticPoint upLeftPoint = rugged.directLocation(firstLineDate, position, los);
+            System.out.format(Locale.US, "upper left point: φ = %8.3f °, λ = %8.3f °, h = %8.3f m%n",
+                              FastMath.toDegrees(upLeftPoint.getLatitude()),
+                              FastMath.toDegrees(upLeftPoint.getLongitude()),
+                              upLeftPoint.getAltitude());
+
+        } catch (OrekitException oe) {
+            System.err.println(oe.getLocalizedMessage());
+            System.exit(1);
+        } catch (RuggedException re) {
+            System.err.println(re.getLocalizedMessage());
+            System.exit(1);
+        }
+
+    }
+
+    private static void addSatellitePV(TimeScale gps, Frame eme2000, Frame itrf,
+                                  ArrayList<TimeStampedPVCoordinates> satellitePVList,
+                                  String absDate,
+                                  double px, double py, double pz, double vx, double vy, double vz)
+        throws OrekitException {
+        AbsoluteDate ephemerisDate = new AbsoluteDate(absDate, gps);
+        Vector3D position = new Vector3D(px, py, pz);
+        Vector3D velocity = new Vector3D(vx, vy, vz);
+        PVCoordinates pvITRF = new PVCoordinates(position, velocity);
+        Transform transform = itrf.getTransformTo(eme2000, ephemerisDate);
+        Vector3D pEME2000 = transform.transformPosition(pvITRF.getPosition());
+        Vector3D vEME2000 = transform.transformVector(pvITRF.getVelocity());
+        satellitePVList.add(new TimeStampedPVCoordinates(ephemerisDate, pEME2000, vEME2000, Vector3D.ZERO));
+    }
+
+    private static void addSatelliteQ(TimeScale gps, ArrayList<TimeStampedAngularCoordinates> satelliteQList, String absDate,
+                                      double q0, double q1, double q2, double q3) {
+        AbsoluteDate attitudeDate = new AbsoluteDate(absDate, gps);
+        Rotation rotation = new Rotation(q0, q1, q2, q3, true);
+        TimeStampedAngularCoordinates pair =
+                new TimeStampedAngularCoordinates(attitudeDate, rotation, Vector3D.ZERO, Vector3D.ZERO);
+        satelliteQList.add(pair);
+    }
+
+    private static class VolcanicConeElevationUpdater implements TileUpdater {
+
+        private GeodeticPoint summit;
+        private double        slope;
+        private double        base;
+        private double        size;
+        private int           n;
+
+        public VolcanicConeElevationUpdater(GeodeticPoint summit, double slope, double base,
+                                            double size, int n) {
+            this.summit = summit;
+            this.slope  = slope;
+            this.base   = base;
+            this.size   = size;
+            this.n      = n;
+        }
+
+        public void updateTile(double latitude, double longitude, UpdatableTile tile)
+            throws RuggedException {
+            double step         = size / (n - 1);
+            double minLatitude  = size * FastMath.floor(latitude  / size);
+            double minLongitude = size * FastMath.floor(longitude / size);
+            double sinSlope     = FastMath.sin(slope);
+            tile.setGeometry(minLatitude, minLongitude, step, step, n, n);
+            for (int i = 0; i < n; ++i) {
+                double cellLatitude = minLatitude + i * step;
+                for (int j = 0; j < n; ++j) {
+                    double cellLongitude = minLongitude + j * step;
+                    double distance       = Constants.WGS84_EARTH_EQUATORIAL_RADIUS *
+                                            FastMath.hypot(cellLatitude  - summit.getLatitude(),
+                                                           cellLongitude - summit.getLongitude());
+                    double altitude = FastMath.max(summit.getAltitude() - distance * sinSlope,
+                                                   base);
+                    tile.setElevation(i, j, altitude);
+                }
+            }
+        }
+
+    }
+}