About: Henry Raper

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Henry Raper (1799 – 6 January 1859) was a British Royal Naval lieutenant who became a nineteenth-century authority on navigation. Amongst his achievements was his quantification of the unreliability of a key longitudinal measurement, lunar distance, when taken at different times. One early beneficiary of Raper's research was Robert FitzRoy, whose second expedition was made famous by the work of his travelling companion, Charles Darwin. Raper died on 6 January 1859 at Torquay in Devon, England.

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  • Henry Raper (1799 – 6 January 1859) was a British Royal Naval lieutenant who became a nineteenth-century authority on navigation. Amongst his achievements was his quantification of the unreliability of a key longitudinal measurement, lunar distance, when taken at different times. One early beneficiary of Raper's research was Robert FitzRoy, whose second expedition was made famous by the work of his travelling companion, Charles Darwin. Raper is primarily remembered, however, for his seminal work The Practice of Navigation and Nautical Astronomy, for which he was awarded the Founder's Medal of the Royal Geographical Society in 1841. According to his memorial at St Peter & St Paul's Church, in Dinton, Buckinghamshire, it was "a work universally adopted by the naval service". Raper died on 6 January 1859 at Torquay in Devon, England. (en)
  • ヘンリー・レイパー(Henry Raper、1799年 - 1859年1月6日)は、19世紀において航法の権威とされたイギリス海軍の大尉。その業績のひとつは、天測航法において経度計測の主要な手法である月距法を用いた場合、異なる時点の観測結果から生じる誤差の計量化であった。レイバーの研究成果の恩恵を早い時期に受けたひとりはロバート・フィッツロイであり、艦長を務めたビーグルの2回目の遠征(1831年 - 1836年)は、これに乗り組んだチャールズ・ダーウィンの業績によって有名になった。 (ja)
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  • ヘンリー・レイパー(Henry Raper、1799年 - 1859年1月6日)は、19世紀において航法の権威とされたイギリス海軍の大尉。その業績のひとつは、天測航法において経度計測の主要な手法である月距法を用いた場合、異なる時点の観測結果から生じる誤差の計量化であった。レイバーの研究成果の恩恵を早い時期に受けたひとりはロバート・フィッツロイであり、艦長を務めたビーグルの2回目の遠征(1831年 - 1836年)は、これに乗り組んだチャールズ・ダーウィンの業績によって有名になった。 (ja)
  • Henry Raper (1799 – 6 January 1859) was a British Royal Naval lieutenant who became a nineteenth-century authority on navigation. Amongst his achievements was his quantification of the unreliability of a key longitudinal measurement, lunar distance, when taken at different times. One early beneficiary of Raper's research was Robert FitzRoy, whose second expedition was made famous by the work of his travelling companion, Charles Darwin. Raper died on 6 January 1859 at Torquay in Devon, England. (en)
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  • Henry Raper (en)
  • ヘンリー・レイパー (ja)
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