I've written up my findings (almost 100 aircraft, 17 front companies) and how I reached them at https://storify.com/jjwiseman/tracking-fbi-aerial-surveillan...
Hi John, Had you heard about the discovery of the plane last year in Sacramento? Here [1] is the story where they figured out the "JENNA" call sign. Here is the story that started it all. [2] [1] http://www.news10.net/story/news/local/arden-lariviera/2014/... [2] http://www.news10.net/story/news/local/sacramento/2014/03/18...
I found one link that claimed he found an FAA or DOJ publication that had at one time mentioned the JENNA callsign, but was then edited to remove the reference.