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@@ -44,3 +44,7 @@ dump a specific TLE
 The TLE is searched by printing the first tle matching the given name. So by
 searching for `SIRIUSSAT` from the `stations` category, the TLE of the first
 match (`SIRIUSSAT-1`) will be returned, not `SIRIUSSAT-2`. 
+
+## Links
+
+Convert Keppler Orbital Elements to Cartesian State Vectors: https://downloads.rene-schwarz.com/download/M001-Keplerian_Orbit_Elements_to_Cartesian_State_Vectors.pdf