The year 1946 saw a remarkable feat by the US Army as they bounced radar signals off the Moon, demonstrating that radio waves can traverse the ionosphere. This innovative test, called Project Diana, utilized modified radar equipment from WWII. The successful detection of lunar echoes not only confirmed this capability but also served as a catalyst for the evolution of radar astronomy and the broader realm of space exploration.
In 1946, the US Army’s Project Diana successfully bounced a radar signal off the Moon and detected its faint echo 2.5 seconds later, marking a breakthrough in radar astronomy and space communication. (AI-generated image)
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