\"Radio Astronomer\" John V. Evans Hand Signed 3.5X4.5 B&W Photo COA for Sale

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\"Radio Astronomer\" John V. Evans Hand Signed 3.5X4.5 B&W Photo COA For Sale

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\"Radio Astronomer\" John V. Evans Hand Signed 3.5X4.5 B&W Photo COA:
$199.99

Up for sale\"Radio Astronomer\" John V. Evans Hand Signed 3.5X4.5 B&W Photo.This item is certified authentic by ToddMueller Autographs and comes with their Certificate ofAuthenticity.
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John V. Evans(born 5 July 1933) is a British-Americanradio astronomerborn in Manchester, England. He obtained his Ph.D. at theUniversity of Manchester, and has been a professor at theLincoln Laboratoryof theMassachusetts Institute of Technologysince 1960.He received the 1975 Appleton Prize.Evans showed how long-period lunar echo fading could be used to measure the ionospheric electron density. William Smith used Long Michelson interferometer observations of sources to do the same. He also showed that lunar scattering was limb-darkened. With G. N. Taylor, he bounced radar echoes off Venus in September 1959. He has performed radar studies of the Moon, Venus, etc. He also worked on detectingSputnik 1withJodrell Bank. He co-authored with T. Hagfors the classic textbook of Radar Astronomy.