Corpus ID: 18990068

Genesis of the 1000-Foot Arecibo Dish

  title={Genesis of the 1000-Foot Arecibo Dish},
  author={MARSHALL H. Cohen},
  journal={Journal of Astronomical History and Heritage},
The giant radar/radio astronomy dish near Arecibo, Puerto Rico, was conceived by William E. Gordon in early 1958 as a back-scattering radar system to measure the density and temperature of the Earth’s ionosphere up to a few thousand kilometers. Gordon calculated the required size of the antenna by using the Thomson cross-section for scattering by the electrons, and assuming that the elementary scattered waves would be incoherent. During the summer and autumn of 1958 Gordon led a study group… Expand

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