An engineer formerly working at the National Radio Astronomy Observatory (http://www.gb.nrao.edu/nrqz/) lists its radiation emissions controls: http://cryptome.org/2013/07/radiated-emissions-control.htm Among them is the banning of vehicles which use spark plugs, thus diesel-fueled are required. Which suggests a question about radiation emissions at NSA Utah Data Center's 32 large generators. Since nearly all government and commercial data centers have generator back-ups, how are emissions from generators controlled? NRAO also "banned digital cameras down range after they proved quite noisy." Are noisy digital camera emissions more privacy threatening than phone signals? Is NSA harvesting those emissions?