The Air Force's Cambridge Research Center, Weapons Laboratory, and Aerospace Corporation designed the scientific and engineering experiment package of fourteen instruments. They included the "Phantom" tissue-equivalent ion chamber (comprising gas-filled tubes simulating the heart, kidneys and lung tissue topped with a Plexiglass cover simulating skin), as well as a Cerenkov counter, a charged particle flux counter, a Faraday Cup electrometer, a magnetic spectrometer, an omnidirectional spectrometer, a scintillation spectrometer, and a plasma wave detector.
