MET4994_5994_RS_Lec2_S11

MET4994_5994_RS_Lec2_S11 - MET MET 4994 Remote Sensing...

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MET 4994 Remote Sensing: Radar and Satellite Meteorology MET 5994 Remote Sensing in Meteorology Lecture 2: January 12, 2011 Brief history of radar and satellite meteorology
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History of Radar Meteorology Pre-World War II: 1)1904: German Engineer Hulsmeyer’s patent A device to detect radio waves reflected by ships 3)1920’s - 1930’s: Walson- Watt in Britain is regarded as the inventor of radar (Father of radar): Radio Direction Finding (RDF) Memo drafted by Watson Watt on February 12, 1935: “Detection of Aircraft by Radio Methods” 2) U.S. Navy (among others) tried using radio waves to detect ships.
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4)1940: RADAR (Radio Detection And Ranging) Term “RADAR” officially coined as an acronym by U.S. Navy Lt. Cmdr. Samuel M. Tucker and F. R. Furth in November 1940 World War II: 1) Big development: cavity magnetron Capable of increasing power output tenfold plus, generate high frequencies in microwave band Invented by John Randall and Henry Boot at the University of Birmingham (in Britain) on February 21, 1940 Opened the door wide for significant development 2) The radiation Lab in MIT, USA manufactured the radar magnetron transmitter tube developed in Britain.
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Radar and the Atmosphere Meteorological effects found by military users of radar: -- stimulated the theoretical work on the scattering, absorption, and propagation of microwaves in the lower atmosphere In Britain: 1) 1940: the first observation of precipitation likely was made. 2) 1945: the first account of radar observation of a tropical cyclone was published 3) 1946: the first major post-war symposium on radar meteorology was held in London. 4) 1951: the book “Propagation of short radio waves” by Kerr.
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Radar and the Atmosphere In US: 1) 1941: First detection at Rad Lab, MIT: 7 February 1941 2) 1943: First U.S. publication regarding meteorological weather echoes: “Radar echoes from atmospheric phenomena” (Bent, 1943) 3) 1946: Weather Radar Research Project at MIT Initial project director: Alan Bemis 4) 1945: U.S. Air Force All Weather Flying Division: project AW-MET-8 David Atlas among the first to lead Alan Bemis David Atlas
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Early Equipment Innovative uses of military radar by meteorologists:
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