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A comment on Designing a Home Radio Telescope for 21 Cm Emission.

Re:Designing a Home Radio Telescope for 21 Cm Emission by mhh__ on Monday November 04, 2024 @02:55PM (#42045426)
The german Wurzberg radar system (https://en.wikipedia.org/wiki/W%C3%BCrzburg_radar) was used after the war to help discover the hydrogen line.
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