Donald Harry Sadler was an English astronomer and mathematician who developed an international reputation for his work in preparing astronomical and navigational almanacs.
26 Facts About Donald Sadler
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Donald Sadler worked as the Superintendent of His Majesty's Nautical Almanac Office from 1937 to 1971.
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Donald Sadler was born in Dewsbury, Yorkshire, on 22 August 1908.
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Donald Sadler studied mathematics at the University of Cambridge and received a first-class degree in 1929.
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Donald Sadler contributed to the work of the Computing Section of the British Astronomical Association.
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Donald Sadler began work as an assistant at His Majesty's Nautical Almanac Office in 1930, working under the direction of the Superintendent, Leslie Comrie, when it was based at the Royal Naval College in Greenwich, London.
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Donald Sadler was promoted to Deputy Superintendent of the Office in 1933.
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Leslie Comrie 8.
Donald Sadler was appointed Comrie's successor as Superintendent of the Nautical Almanac Office in 1937.
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Donald Sadler was the eighth person to occupy this post since it was created in 1818.
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Donald Sadler took on the task of consolidating projects begun by Comrie, publishing new tables for use in navigation.
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Donald Sadler was awarded the OBE in 1948 in recognition of this work.
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Donald Sadler supervised the relocation of the Nautical Almanac Office in 1949 from Bath to the new home of the Royal Greenwich Observatory at Herstmonceux Castle in Sussex.
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Donald Sadler expanded the use of calculating machines in astronomical calculations.
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Donald Sadler increased international cooperation in preparing astronomical tables, particularly with the United States Naval Observatory.
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In 1954 Donald Sadler married his colleague, Flora Donald Sadler, in what was described as 'the astronomical romance of the decade'.
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Donald Sadler oversaw the transfer of the Nautical Almanac Office within the Royal Greenwich Observatory from the control of the Admiralty to the new Science Research Council.
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Donald Sadler became a fellow of the Royal Astronomical Society in 1931, and served on the society's council.
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Donald Sadler acted as a secretary between 1939 and 1947, contributing to sustaining the society's work during the war.
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Donald Sadler served as the society's president from 1967 to 1969.
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Donald Sadler contributed to other scientific societies, including the Royal Institute of Navigation, of which he was president from 1953 to 1955.
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Donald Sadler served as general secretary of the International Astronomical Union, then as vice-president, and president of the Council of the Federation of Astronomical and Geophysical Services.
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In 1981, Donald Sadler became a founding member of the World Cultural Council.
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Donald Sadler retired as Superintendent of the Nautical Almanac Office in 1971.
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Donald Sadler continued working at the office for a further year, retiring in February 1972.
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Donald Sadler continued with his activities in the Royal Institute of Navigation.
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Leslie Comrie 26.
Donald Sadler died at Bexhill-on-Sea, East Sussex, on 24 October 1987.