Read the top part of NRLGenData.f
   To use NRL data, in  Cosmos/cosmos/condc.h, 
ATMOSPHERE 
   must be set to 3  and the library must be updated.
To do so,  if Zcondc.h is ready,
1)  go to Cosmos/Tracking/Atmosphere
2)  touch cstandatmos0.f
3)  make clean; make
This is ok for using NRLGenData.f (make clean
make here) but for entire cosmos, it is better to
4)  remove all in Cosmos/cosmos/lib/$ARCH/*
5)  and remake the entire library.


