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

[Mariner R Venus probe schematic]

Mariner R Venus Probe - space vehicle configuration. Mariner R, with only two radiometer channels, was launched in August 1962. (Mariner A was a 4-channel system to be launched by a Centaur rocket. The Centaur was not available, and the payload was reduced to allow launch with an Atlas-Agena. Two channels were removed, and the sensor was renamed Mariner R.) Credit: Photo courtesy of Doc Ewen.

Slide 34
Modified on [an error occurred while processing this directive] by Ellen Bouton