[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 3

[STAG test set-up]

Upper photo: The 95GHz radiometric sensor was rope-supported above the midpoint of the water bin 10 feet above the moving target. The sensor RF head weighed less than 15 lbs, as indicated by the scale. Weight is a critical parameter for airborne and satellite sensors. The design is driven by Size, Weight And Power (SWAP)

Lower photo: The system control and data processing unit was packaged in a standard 3.5 inch panel for 19 inch console mounting. The control unit was located in the garage with the PC, AC-DC converter, and strip chart recorder.

Credit: Photos courtesy of Doc Ewen


Modified on Monday, 30-May-2005 10:26:37 EDT by Ellen Bouton