RC-135 at ICT January, 2016
"The RC-135U Combat Sent is designed to collect technical intelligence on adversary radar emitter systems. Combat Sent data is collected to develop new or upgraded radar warning receivers, radar jammers, decoys, anti-radiation missiles, and training simulators.
"Distinctly identified by the antennae arrays on the nose, tail, and wing tips, three RC-135C aircraft were converted to RC-135U (63-9792, 64-14847, & 64-14849) in the early 1970s and 63-9792 was converted to Rivet Joint, late 1978, and all aircraft are based at Offutt Air Force Base, Nebraska. Minimum crew requirements are 2 pilots, 2 navigators, 3 systems engineers, 10 electronic warfare officers, and 6 area specialists."
Wikipedia (7 January, 2016) Boeing RC-135. Retrieved 26 January, 2016 from https://en.wikipedia.org/wiki/Boeing_RC-135#RC-135S_Cobra_Ball