[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 5: May 2001 Visit to NRAO, Green Bank WV

[Doc on GBT balcony]

Doc on the GBT balcony (fellow in the middle). The large jug on the right is the L-band feed used for hydrogen studies. It appears to be larger than the original horn. Credit: Doc Ewen.

Modified on Saturday, 14-Aug-2004 17:53:09 EDT by Ellen Bouton