David W. Allan, Date of Birth, Place of Birth
TweetDavid W. Allan
physicist
Date of Birth: 25-Sep-1936
Place of Birth: Mapleton, Utah, United States
Profession: physicist
Nationality: United States
Zodiac Sign: Libra 
About David W. Allan
- David Wayne Allan (born September 25, 1936, Mapleton, Utah) is an American atomic clock physicist and author of the Allan variance, also known as the two-sample variance, a measure of frequency stability in clocks, oscillators and other applications.
- He worked for the National Bureau of Standards in Colorado.Allan studied physics at the Brigham Young University (B.S.
- 1960) and at the University of Colorado (M.S.
- 1965).
- From 1960 he was a physicist in the Time and Frequency Division of the National Institute of Standards and Technology (then the National Bureau of Standards) in Boulder, and from 1979 was 1988 chief of the Time and Frequency Coordination Group.
- He retired in 1992 and lives in Fountain Green, Utah.In 1982, Allan was a guest scientist in the People's Republic of China and in 1981 a consultant for the United Nations Development Program in New Delhi.Allan is an active member of the Church of Jesus Christ of Latter-day Saints.
- He has been married to Edna Love Ramsay since 1959.
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