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

[Texas Towers]

The Texas Towers in the waters off New England. With 50 KW-CW, 900 MHz power amplifiers for tropospheric scatter communications, the Texas Towers were a product of the 1950s and a building block for UHF television. After Sputnik was launched, the Texas Towers were brought back to shore, no longer useful for the purpose for which they were intended. Credit: Photo courtesy of Doc Ewen.

Slide 12
Modified on Friday, 07-Jan-2005 09:21:09 EST by Ellen Bouton