diff --git a/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/GroundMeasurementGenerator.java b/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/GroundMeasurementGenerator.java
index de9e085f1174ed6ed47ffc9420acb4d4c6316d85..06192a0257beea23ebfb13664c8ca14d5f020d93 100644
--- a/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/GroundMeasurementGenerator.java
+++ b/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/GroundMeasurementGenerator.java
@@ -139,7 +139,7 @@ public class GroundMeasurementGenerator implements Measurable {
         final double meanGenerator[] =  {latErrorMean, lonErrorMean, mean[2]};
         final double stdGenerator[] = {latErrorStd, lonErrorStd, std[2]};
 
-        // TODO GP commentaire sur la seed du generator ???
+        // seed has been fixed for tests purpose
         final GaussianRandomGenerator rng = new GaussianRandomGenerator(new Well19937a(0xefac03d9be4d24b9l));
         final UncorrelatedRandomVectorGenerator rvg = new UncorrelatedRandomVectorGenerator(meanGenerator, stdGenerator, rng);
 
@@ -174,9 +174,6 @@ public class GroundMeasurementGenerator implements Measurable {
      * @throws RuggedException
      */
     private Vector3D estimateLatLongError() throws RuggedException {
-
-        // TODO GP add explanation
-
         final int pix = sensor.getNbPixels() / 2;
         final int line = (int) FastMath.floor(pix); // assumption : same number of line and pixels;
 
@@ -188,10 +185,6 @@ public class GroundMeasurementGenerator implements Measurable {
 
         final double latErr = FastMath.abs(gp_pix0.getLatitude() - gp_pix1.getLatitude());
         final double lonErr = FastMath.abs(gp_pix0.getLongitude() - gp_pix1.getLongitude());
-
-//        final double distanceX =  DistanceTools.computeDistanceInMeter(gp_pix0.getLongitude(), gp_pix0.getLatitude(), gp_pix1.getLongitude(), gp_pix0.getLatitude());
-//        final double distanceY =  DistanceTools.computeDistanceInMeter(gp_pix0.getLongitude(), gp_pix0.getLatitude(), gp_pix0.getLongitude(), gp_pix1.getLatitude());
-
         return new Vector3D(latErr, lonErr, 0.0);
     }
 }
diff --git a/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/InterMeasurementGenerator.java b/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/InterMeasurementGenerator.java
index 4e1864d728192ed60bbb89c8891b9d8ef598b680..fbe74b5069aa46d11c5023256812f8830cb16666 100644
--- a/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/InterMeasurementGenerator.java
+++ b/src/tutorials/java/fr/cs/examples/refiningPleiades/generators/InterMeasurementGenerator.java
@@ -63,9 +63,6 @@ public class InterMeasurementGenerator implements Measurable {
     /** Number of measurements */
     private int measurementCount;
 
-    // TODO GP pas utilise ...
-    //   private String sensorNameA;
-
     /** Sensor name B */
     private String sensorNameB;
 
@@ -259,11 +256,11 @@ public class InterMeasurementGenerator implements Measurable {
         final double meanB[] = { mean[1], mean[1] };
         final double stdB[]  = { std[1], std[1] };
 
-        // TODO GP explanation about seed ???
+        // seed has been fixed for tests purpose
         final GaussianRandomGenerator rngA = new GaussianRandomGenerator(new Well19937a(0xefac03d9be4d24b9l));
         final UncorrelatedRandomVectorGenerator rvgA = new UncorrelatedRandomVectorGenerator(meanA, stdA, rngA);
 
-        // TODO GP explanation about seed ???
+        // seed has been fixed for tests purpose
         final GaussianRandomGenerator rngB = new GaussianRandomGenerator(new Well19937a(0xdf1c03d9be0b34b9l));
         final UncorrelatedRandomVectorGenerator rvgB = new UncorrelatedRandomVectorGenerator(meanB, stdB, rngB);
 
@@ -290,7 +287,7 @@ public class InterMeasurementGenerator implements Measurable {
                                                                      sensorB.getLOS(dateB, pixelB));
                     final double GEOdistance = DistanceTools.computeDistanceInMeter(gpA.getLongitude(), gpA.getLatitude(),
                                                                                     gpB.getLongitude(), gpB.getLatitude());
-                    // TODO GP explanation about computation here
+                    // create the inter mapping if distance is below outlier value
                     if (GEOdistance < outlier) {
 
                         final double[] vecRandomA = rvgA.nextVector();
diff --git a/src/tutorials/java/fr/cs/examples/refiningPleiades/metrics/LocalisationMetrics.java b/src/tutorials/java/fr/cs/examples/refiningPleiades/metrics/LocalisationMetrics.java
index 50f866989839c387df03833e1e62852b88802c08..9071e5ac698e82ebe0b21e5bfe12e5828ce57fcf 100644
--- a/src/tutorials/java/fr/cs/examples/refiningPleiades/metrics/LocalisationMetrics.java
+++ b/src/tutorials/java/fr/cs/examples/refiningPleiades/metrics/LocalisationMetrics.java
@@ -33,7 +33,6 @@ import org.orekit.rugged.utils.SpacecraftToObservedBody;
 import org.orekit.time.AbsoluteDate;
 
 /**
- * TODO GP migrer sous tutorials
  * Class for testing geometric performances in absolute location.
  * Metrics are computed for two scenarios: ground points and liaison points.
  * @see SensorToSensorMapping
diff --git a/src/tutorials/java/fr/cs/examples/refiningPleiades/models/OrbitModel.java b/src/tutorials/java/fr/cs/examples/refiningPleiades/models/OrbitModel.java
index 43f960a1f950170cbccc9520bea774e38a6e40d8..036391e6064795f239b562518a34c10516e7cf30 100644
--- a/src/tutorials/java/fr/cs/examples/refiningPleiades/models/OrbitModel.java
+++ b/src/tutorials/java/fr/cs/examples/refiningPleiades/models/OrbitModel.java
@@ -60,8 +60,10 @@ import org.orekit.utils.TimeStampedPVCoordinates;
 import org.orekit.utils.AngularDerivativesFilter;
 
 /**
- * TODO GP add comments for tuto
  * Orbit Model class to generate positions-velocities and attitude quaternions.
+ * <p>
+ * the aim of this class is to simulate the orbit model of an LEO satellite
+ * </p>
  * @author Jonathan Guinet
  * @author Guylaine Prat
  * @since 2.0 */
diff --git a/src/tutorials/java/fr/cs/examples/refiningPleiades/models/PleiadesViewingModel.java b/src/tutorials/java/fr/cs/examples/refiningPleiades/models/PleiadesViewingModel.java
index 8bc89c5f8a18e4f6237e22cf6b0d2016229e93f4..bb17aa3a40184aa317664b8d8441719c00a6c4b1 100644
--- a/src/tutorials/java/fr/cs/examples/refiningPleiades/models/PleiadesViewingModel.java
+++ b/src/tutorials/java/fr/cs/examples/refiningPleiades/models/PleiadesViewingModel.java
@@ -40,8 +40,8 @@ import org.orekit.rugged.errors.RuggedException;
 import org.orekit.errors.OrekitException;
 
 /**
- * TODO GP add comments for tuto
  * Pleiades viewing model class definition.
+ * the aim of this class is to simulate PHR sensor.
  * @author Jonathan Guinet
  * @author Lucie Labat-Allee
  * @since 2.0