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Squadron Leader Leonard George Chapman (28 March 1910 – 25 July 1975) was an inventor, radio engineer and Royal Air Force officer. While serving in the Royal Air Force he invented the 'Chapman Method' in 1937–1938.〔Burns, Russell, ed. Chapter 8〕〔Bawdsey Research Station, Memorandum 〕 This method accurately determines the location of an object from the time difference of arrival of a signal (possibly radio echo) emitted from that object to three or more receivers. A method commonly used in civil and military surveillance applications, and also known as Multilateration. Thus it has been suggested that Chapman be nominated as the father of Multilateration.〔Nicholas J. Willis, Hugh D. Griffiths (Pages 20–22 especially Note 10 )〕 Chapman was in charge of installing 5 radar stations〔 as part of the Chain Home system. Including the Netherbutton station in the parish of Holm, Orkney Islands, the installation of which Chapman performed while only holding the rank of Corporal.〔Jim MacDonald, v2.2〕 He had a long and distinguished career holding a variety of commands, rising to the rank of Squadron Leader and receiving a permanent commission.〔(London Gazette supplement, List of permanent commissions awarded )〕 ==Early life== Leonard Chapman was born on 28 March 1910 to father George Chapman and mother Ellen Cole. George Chapman was serving at the time in the Queen's Northamptonshire Regiment. By 1929 the direction of Leonard Chapman's life's work had begun to form when he attended Flowerdown, the Royal Air Force Electrical and Wireless school for training aircraft apprentices.〔Flowerdown Apprentices Association, L.G.Chapman Flowerdown Golden Jubilee Invitation〕 Subsequently Chapman attended the Chatham Technical School for 2 years. He was then accepted into the Engineering Department of Woolwich Polytechnic for 3 years, after which he attended the Royal Air Force Electrical and Radio School for 3 years. Finally in 1937 he attended the Ground Radar course under Watson-Watt.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Leonard George Chapman」の詳細全文を読む スポンサード リンク
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