Project Churchy
In 1948 Skyhook balloons were used to show that in addition to protons and electrons, cosmic rays also include high energy atomic nuclei that are stripped of their electrons. Thirteen stratospheric plastic Skyhook balloons were launched in September 1953 as part of Project Churchy, an Office of Naval Research funded cosmic ray expedition at the geomagnetic equator. Project Churchy was conducted at the Galápagos because high-energy cosmic-ray particles can only be collected at the geomagnetic equator without accompanying low-energy particles found at higher latitudes. Balloons carrying scientific instruments rose to between 90,000 feet (27,000 m) and 105,000 feet (32,000 m) and encountered temperatures as low as -80°C (-112°F). Aircraft from Patrol Squadron (VP) 45 ‘Pelicans’ took off an hour after the launch of each balloon and visually tracked the balloon until it released its cargo and deflated. The instruments were observed until splashdown, and marked for destroyers to retrieve.
Read more about this topic: Skyhook Balloon
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