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Orbiting Solar Observatory, OSO-4,5,6

The X-ray telescope consisted of a single thin NaI(Tl) scintillation crystal plus phototube assembly enclosed in a CsI(Tl) anti-coincidence shield. - 1967

Space Missions

18 October 1967

  • X-ray instruments were flown on OSO-4
  • an X-ray spectroheliograph was flown on OSO-5 
  • a Lyman-alpha spectrometer was flown on OSO-6.