diff --git a/src/asterx1_gps.h b/src/asterx1_gps.h
index 77701d61ce6872a7246ee158b901ab1ca7feb073..0f2d769f3e41744c5d5fece93f37e099f5460835 100644
--- a/src/asterx1_gps.h
+++ b/src/asterx1_gps.h
@@ -73,7 +73,7 @@ struct asterx1DeviceConfig {
 
 //physical constants
 const double EARTH_RADIUS = 6378137.0;
-const double EARTH_EXCENTRICITY = 0.081819190842622; 
+const double EARTH_EXCENTRICITY = 0.0818191908426220; 
 
 //Device protocol constants (SBF protocol)
 const unsigned short int PVTCartesian_ID = 4006;