diff --git a/src/main/java/org/orekit/rugged/los/FixedLOS.java b/src/main/java/org/orekit/rugged/los/FixedLOS.java
index e3f15d0f97709498c646d98df21bc2a464c1c38b..ef969099d5a2a3ef85b7a98e1dc87ca64078cf40 100644
--- a/src/main/java/org/orekit/rugged/los/FixedLOS.java
+++ b/src/main/java/org/orekit/rugged/los/FixedLOS.java
@@ -17,7 +17,6 @@
 package org.orekit.rugged.los;
 
 import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
-import org.orekit.rugged.linesensor.LineSensor;
 import org.orekit.time.AbsoluteDate;
 
 /** Line-of-sight which does not depends on time.
diff --git a/src/main/java/org/orekit/rugged/los/FixedRotation.java b/src/main/java/org/orekit/rugged/los/FixedRotation.java
index 56368109a0901a640f1ff4393ed1b70c83a1aa0b..8489e3ba1215abcfb97ed3015926ca7b8d7ef1c4 100644
--- a/src/main/java/org/orekit/rugged/los/FixedRotation.java
+++ b/src/main/java/org/orekit/rugged/los/FixedRotation.java
@@ -27,7 +27,7 @@ import org.orekit.time.AbsoluteDate;
 public class FixedRotation implements LOSTransform {
 
     /** Underlying rotation. */
-    final Rotation rotation;
+    private final Rotation rotation;
 
     /** Simple constructor.
      * @param rotation rotation to apply
@@ -38,8 +38,8 @@ public class FixedRotation implements LOSTransform {
 
     /** {@inheritDoc} */
     @Override
-    public Vector3D transformLOS(int i, Vector3D los, AbsoluteDate date) {
+    public Vector3D transformLOS(final int i, final Vector3D los, final AbsoluteDate date) {
         return rotation.applyTo(los);
     }
-    
-}
\ No newline at end of file
+
+}
diff --git a/src/main/java/org/orekit/rugged/los/LOSBuilder.java b/src/main/java/org/orekit/rugged/los/LOSBuilder.java
index 67ed4f38fe44e66872254095717fc1d37211a311..581ffb8bc1fc839f420150999caac66f6c1eb2b1 100644
--- a/src/main/java/org/orekit/rugged/los/LOSBuilder.java
+++ b/src/main/java/org/orekit/rugged/los/LOSBuilder.java
@@ -36,7 +36,7 @@ import org.orekit.time.AbsoluteDate;
 public class LOSBuilder {
 
     /** Raw fixed ine-of-sights. */
-    public final List<Vector3D> rawLOS;
+    private final List<Vector3D> rawLOS;
 
     /** Transforms to be applied. */
     private final List<LOSTransform> transforms;
@@ -54,7 +54,6 @@ public class LOSBuilder {
      */
     public void addTransform(final LOSTransform transform) {
         transforms.add(transform);
-        
     }
 
     /** Build a list of transformed lines-of-sight.
@@ -106,7 +105,6 @@ public class LOSBuilder {
             }
             return los.normalize();
         }
-        
     }
 
 }
diff --git a/src/main/java/org/orekit/rugged/los/LOSTransform.java b/src/main/java/org/orekit/rugged/los/LOSTransform.java
index a628e82a26ad7764bf70eec02fc4f17efacdb1d1..a6f10ccf633d4f960840106a62e6be9ba2aa240f 100644
--- a/src/main/java/org/orekit/rugged/los/LOSTransform.java
+++ b/src/main/java/org/orekit/rugged/los/LOSTransform.java
@@ -31,4 +31,4 @@ interface LOSTransform {
      * @return transformed line-of-sight
      */
     Vector3D transformLOS(int i, Vector3D los, AbsoluteDate date);
-}
\ No newline at end of file
+}
diff --git a/src/main/java/org/orekit/rugged/los/PolynomialRotation.java b/src/main/java/org/orekit/rugged/los/PolynomialRotation.java
index 4447af9bfc00d27404e0bbc8bc7722624136c5d0..cc97a47fa235d3ff3dc7dd9ca79f87f01a387d3c 100644
--- a/src/main/java/org/orekit/rugged/los/PolynomialRotation.java
+++ b/src/main/java/org/orekit/rugged/los/PolynomialRotation.java
@@ -28,13 +28,13 @@ import org.orekit.time.AbsoluteDate;
 public class PolynomialRotation implements LOSTransform {
 
     /** Rotation axis. */
-    final Vector3D axis;
+    private final Vector3D axis;
 
     /** Rotation angle polynomial. */
-    final PolynomialFunction angle;
+    private final PolynomialFunction angle;
 
     /** Reference date for polynomial evaluation. */
-    final AbsoluteDate referenceDate;
+    private final AbsoluteDate referenceDate;
 
     /** Simple constructor.
      * @param axis rotation axis
@@ -52,8 +52,8 @@ public class PolynomialRotation implements LOSTransform {
 
     /** {@inheritDoc} */
     @Override
-    public Vector3D transformLOS(int i, Vector3D los, AbsoluteDate date) {
+    public Vector3D transformLOS(final int i, final Vector3D los, final AbsoluteDate date) {
         return new Rotation(axis, angle.value(date.durationFrom(referenceDate))).applyTo(los);
     }
-    
-}
\ No newline at end of file
+
+}
diff --git a/src/main/java/org/orekit/rugged/los/TimeDependentLOS.java b/src/main/java/org/orekit/rugged/los/TimeDependentLOS.java
index 6e44fefc3837ad3493067ff067236ab45b9c8d3e..9effc6b0c70568fbbc08c0300216c827b6429cd8 100644
--- a/src/main/java/org/orekit/rugged/los/TimeDependentLOS.java
+++ b/src/main/java/org/orekit/rugged/los/TimeDependentLOS.java
@@ -17,7 +17,6 @@
 package org.orekit.rugged.los;
 
 import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;
-import org.orekit.rugged.linesensor.LineSensor;
 import org.orekit.time.AbsoluteDate;
 
 /** Interface representing a line-of-sight which depends on time.