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

[Chart of Sputnik signal]

Chart recording of signal from Sputnik, the first artificial earth satellite. Perimeter surveillance and eavesdropping over the horizon were suddenly obsolete, and defense activities moved from land and sea perimeters to space. Radio astronomy benefited from both pre- and post-Sputnik technology. Credit: slide courtesy of Doc Ewen, from Jack Campbell's original signal reception and display.

Slide 2
Modified on Monday, 27-Dec-2004 11:12:24 EST by Ellen Bouton