diff --git a/src/main/java/org/orekit/rugged/api/Rugged.java b/src/main/java/org/orekit/rugged/api/Rugged.java
index b5db08fbd9394dc1fed17a5e2e830fcead761b10..a9dde86e29692bd30696ed8665cb52a3c015fea8 100644
--- a/src/main/java/org/orekit/rugged/api/Rugged.java
+++ b/src/main/java/org/orekit/rugged/api/Rugged.java
@@ -55,6 +55,7 @@ import org.orekit.rugged.linesensor.LineSensor;
 import org.orekit.rugged.linesensor.SensorMeanPlaneCrossing;
 import org.orekit.rugged.linesensor.SensorPixel;
 import org.orekit.rugged.linesensor.SensorPixelCrossing;
+import org.orekit.rugged.refraction.AtmosphericRefraction;
 import org.orekit.rugged.utils.DSGenerator;
 import org.orekit.rugged.utils.ExtendedEllipsoid;
 import org.orekit.rugged.utils.NormalizedGeodeticPoint;
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8
index df6ea08cb90fbdfffca7b6a68038bc700b6a9370..9f978f98367def25fb9a5f38cac2d0e63d0f5ec5 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8
@@ -72,7 +72,7 @@ TILE_ALREADY_DEFINED = <MISSING TRANSLATION>
 
 # unknown tile {0}, line {1}, file {2}: {3}
 UNKNOWN_TILE = <MISSING TRANSLATION>
- 
+
 # no parameters have been selected for estimation
 NO_PARAMETERS_SELECTED = <MISSING TRANSLATION>