[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

Millimeter Wave Radiometry in the 1990s: MAPS slide 4

[MAPS land mine images]

Close-up of the land mine field in the water/ice test bin, with Millitech/Telaxis Building I is in the background. Snowstorms have negligible effect on passive millimeter wave images at 95 GHz.

Circular metal calibration plates were interspersed throughout the mine field. The three targets in a horizontal line midway in the bin, and the two at either corner in the back, are calibration targets. All others are land mines provided by special ops. Credit: Photo courtesy of Doc Ewen.

MAPS slide 5
Modified on Saturday, 04-Jun-2005 21:21:41 EDT by Ellen Bouton