TLE to cartesian conversion fix

Author: Sceki

kessler/util.py

@@ -89,7 +89,8 @@ def from_cartesian_to_tle_elements(state):
     inclination         = kepl_el[2]
     argument_of_perigee = kepl_el[4]
     raan                = kepl_el[3]
-    mean_anomaly        = kepl_el[5] - kepl_el[1]*np.sin(kepl_el[5])+np.pi
+    mean_anomaly = kepl_el[5] - kepl_el[1]*np.sin(kepl_el[5])
+    mean_anomaly        = mean_anomaly%(2*np.pi)
     return mean_motion, eccentricity, inclination, argument_of_perigee, raan, mean_anomaly