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.[1][2] 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.[3]
Chapman was in charge of installing 5 radar stations[4] 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.[5]
He had a long and distinguished career holding a variety of commands, rising to the rank of Squadron Leader and receiving a permanent commission.[6]
^Burns, Russell, ed. Radar Development to 1945. London: Institution of Electrical Engineers. 2007. Chapter 8
^Bawdsey Research Station, Memorandum
^Nicholas J. Willis, Hugh D. Griffiths Advances in bistatic radar. Scitech Pub Inc. 2007. ISBN 978-1-891121-48-7. Pages 20–22 especially Note 10
^Cite error: The named reference LeonardChapmanResume was invoked but never defined (see the help page).
^Jim MacDonald, Radar in Orkney. Unpublished. v2.2
^London Gazette supplement, List of permanent commissions awarded
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Royal Air Force