page_title: SOLRAD 4
hierarchical_section_title: SOLRAD 4
caption_attribution_description: 330-PSA-23-62 (USN 711005): Composite I Payload Configuration. Satellites in the outlined nosecone of a Thor-Able Star Rocket are, clockwise from top, Solar Radiation IV, Injun II, Drumlike Surcal I, Army Corps of Engineers Ranging and Calibration Satellite, and Lofti II. Remaining attached to the second stage of the rocket, Surcal will convert the empty rocket body into a useful satellite. Photograph released January 24, 1962. (9/29/2015).
context_page_description: SOLRAD 4 was a solar X-ray, ultraviolet, and electronic surveillance satellite. Developed by the United States Navy's Naval Research Laboratory, it was the fourth in both the SOLRAD and the GRAB programs.
  The satellite was to be orbited along with ionospheric study satellite Lofti 2, the United States Army's range calibration satellite Secor, Navy surveillance calibration satellite Surcal, and the University of Iowa's Van Allen Belts-studying Injun 2 satellite. This unprecedented five-in-one mission, called "Composite 1" and "Buckshot", ended in failure on January 24, 1962 after its Thor DM-21 Ablestar 's second stage failed to deliver the payloads to orbit.
context_section_description: SOLRAD (SOLar RADiation) 4 was a solar X-ray, ultraviolet, and electronic surveillance satellite.  Developed by the United States Navy's Naval Research Laboratory, it was the fourth in both the SOLRAD and the GRAB (Galactic Radiation and Background) programs. 
  The satellite was to be orbited along with ionospheric study satellite Lofti 2, the United States Army's range calibration satellite Secor, Navy surveillance calibration satellite Surcal, and the University of Iowa's Van Allen Belts-studying Injun 2 satellite.  This unprecedented five-in-one mission, called "Composite 1" and "Buckshot", ended in failure on January 24, 1962 after its Thor DM-21 Ablestar 's second stage failed to deliver the payloads to orbit.
caption: Composite 1 mission, SOLRAD 4 on top
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