It was operated by the Institute for Cosmic Ray Research, University of Tokyo at the Akeno Observatory.
The results from AGASA were used to calculate the energy spectrum and anisotropy of cosmic rays.
The results helped to confirm the existence of ultra-high energy cosmic rays (>5×1019 eV), such as the so-called "Oh-My-God" particle that was observed by the Fly's Eye experiment run by the University of Utah.
The Telescope Array, a merger of the AGASA and High Resolution Fly's Eye (HiRes) groups, and the Pierre Auger Observatory have improved on the results from AGASA by building larger, hybrid detectors and collecting greater quantities of more precise data.
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