Recompute the flux average Orekit is given

tests/orekit_comparison.rs

@@ -357,7 +357,7 @@ fn test_msis_drag_agrees_with_orekit() {
         position / effect * 100.0
     );
     assert!(
-        position < 1.0e-3 * effect,
+        position < 1.0e-5 * effect,
         "worst disagreement {position:.3e} m is {:.4}% of the {effect:.0} m drag moves it",
         position / effect * 100.0
     );