[Doc Ewen looks into the horn antenna, 1950]
Image courtesy of Doc Ewen

Introduction

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

Bibliography

Permissions


[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

STAG Program Weston testing: Slide 2

[STAG test set-up]

The 95GHz radiometric sensor is rope-supported from a branch of a birch tree. The sensor is located about 10 feet above the midpoint of the water bin. The simulated T-62 tank is covered with aluminum foil, which simulates the reflective properties of a metal tank. Computer control and recording equipment are in a nearby garage. Credit: Photo courtesy of Doc Ewen.

STAG slide 3
Modified on Saturday, 04-Jun-2005 22:16:47 EDT by Ellen Bouton