[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 7: Detecting the Interstellar Hydrogen Line, 1951

[Shklovski 1948 paper]

Later in his 1948 paper, Shklovski says, "To sum up, one may say that with the resources of modern radio techniques it is fully possible to detect and measure the monochromatic radio emission of the galaxy." [Photo courtesy of Doc Ewen]

Slide 8
Modified on Monday, 06-Sep-2004 14:04:27 EDT by Ellen Bouton