Record

Authorised form of name	Baldwin; John Evan (1931 - 2010)
Dates	1931 - 2010
Nationality	British
Date of birth	06/12/1931
Date of death	07/12/2010
Activity	Career: John was the leading light of the "second generation" of radio astronomers at Cambridge and was at the heart of everything in the group during the hugely exciting early period of radio astronomy. The 6C and 7C surveys were for two decades the defining low-frequency surveys. Perhaps less well known is that John pioneered spectral interferometry - the Half-Mile telescope was the first interferometer to image neutral hydrogen. In more recent years John concentrated on developing the new field of optical interferometry: from aperture masks on large optical telescopes to the development of COAST at Lords Bridge he demonstrated that optical interferometry is a powerful tool for future optical imaging. He was quite simply one of the very few people to really understand every aspect of interferometry.
Membership category	Fellow
Date of election	14/03/1991
Age at election	59
Source	Obituaries: Biographical Memoirs of the Royal Society, Vol 57, 2011, pp 3-24, plate, by Malcolm S Longair CBE FRS FRSE
Code	NA3916

Archives associated with this Fellow

RefNo	Title	Date
EC/1991/02	Baldwin, John Evan: certificate of election to the Royal Society	1988
IM/000212	Baldwin, John Evan	1991

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