[Doc Ewen looks into the horn antenna, 1950]
Image courtesy of Doc Ewen


Harvard Cyclotron: 1948-1951

Detection of HI Line: 1951

Harvard 24ft and 60ft and NRAO founding: 1952-1956

1950s and 1960s: Two Roads that Crossed

Microwave & Millimeter Wave Applications in the 1970s and 1980s

Mm Wave Radiometry in the 1990s

May 2001 visit to NRAO Green Bank



[Doc Ewen and horn antenna, 2001]
Image courtesy of Doc Ewen

Doc Ewen: The Horn, HI, and Other Events in US Radio Astronomy

by Doc Ewen, © 2003

Slide 2: Two Roads that Crossed in the Wood - Growth of US Radio Astronomy in the 1950s and 1960s

[NRAO 85 foot telescope]

.The Howard E. Tatel Radio Telescope, built in 1958, was the first major radio telescope at the National Radio Astronomy Observatory (NRAO) in Green Bank, WV. It is also known as 85-1, the first of three 85-foot telescopes of similar design built at NRAO. Built by the Blaw-Knox Corp. of Pittsburgh, PA, it began regular observations in February 1959 and did much of the pioneering radio astronomy at NRAO. In 1964 when the NRAO decided to build an interferometer, the Tatel Telescope became the fixed element in the NRAO 3-element interferometer system. Credit: NRAO/AUI/NSF.

Slide 3
Modified on Friday, 07-Jan-2005 08:52:33 EST by Ellen Bouton