Morning guys!
That could very well be the ATAFCS, although from what I know (not very much) that terrain's not right for Edwards. The pylons are definitely not HMMS racks, even if they were the triple racks we've seen on that G model with the LST in the nose.
If I could see the buzz numbers on the Apaches behind, I might be able to get an idea of which articles they were and what they did during the test program. That might give us a clue as to what the Cobra was doing there.
Considering the Cobra was used for a lot of Apache test stuff, the ATAFCS explanation does make a lot of sense. However, from what I can see on the two Apaches, they are close to the production configuration, which means that TADS/PNVS were installed already and were definitely superior in performance to ATAFCS. Certainly produces some interesting questions!
Jon