Fred J. McCall wrote::
Not necessarily, Pat. There are lots and lots of different factors
involved and different simulations may be better in different areas,
so that sometimes one simulation works better and sometimes another
does.

So there may be no 'best' one and cherry picking from each one to make
a 'best' one is not a simple task.



Well, one obvious way to check would to have each of the programs
predict exactly where a satellite will end up given its input data
before it is launched, then compare that to what actually happens after
it is launched.
Do that for several launches, and you should be able to figure out which
program gives the best data.
If they are each predicting some aspect of its orbit better than the
others...then it's time to write a new program that incorporates the
best aspects of each of the competing programs and standardize on it.

Pat