Using NRLMSISE-00 with numerical propagator

Hi @dl00718,

I think you will get a large error by doing so.
See this former answer from Luc for more insights on why “instantaneous position given by a TLE propagator cannot be used as an initial orbit for another propagator, regardless of the model you use”.

You need to first convert the TLEpropagator to a NumericalPropagator, and then use this converted propagator to propagate until re-entry.
See this post or this tutorial for converting a propagator…