Slide 26: Two Roads that Crossed in the Wood - Growth of US Radio Astronomy in the 1950s and 1960s
![[Modified Polaris radiometric receiver]](ewen_50sand60s_slide26.jpg)
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Modified on by Ellen BoutonSlide 26: Two Roads that Crossed in the Wood - Growth of US Radio Astronomy in the 1950s and 1960s
.The modified Polaris radiometric receiver uses reconfigured noise balance circuit, and is the first commercially available radiometer. It was purchased by National Radio Astronomy Observatory for use in Green Bank, West Virginia. Credit: Photo courtesy of Doc Ewen.
Slide 27