A History of Nautical AstronomyHollis & Carter, 1968 - 387 páginas |
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Página 33
... equinoctial . As the name equinoctial suggests , on these occasions the lengths of daylight and darkness all over the Earth are each twelve hours . During the half year when the Sun lies north of the equinoctial he is said to have north ...
... equinoctial . As the name equinoctial suggests , on these occasions the lengths of daylight and darkness all over the Earth are each twelve hours . During the half year when the Sun lies north of the equinoctial he is said to have north ...
Página 344
Charles H. Cotter. equinoctial . The day on which he changes his motion relative to the equinoctial is called the summer solstice . After the day of the summer solstice , the Sun moves towards the equinoctial , arriving at the First ...
Charles H. Cotter. equinoctial . The day on which he changes his motion relative to the equinoctial is called the summer solstice . After the day of the summer solstice , the Sun moves towards the equinoctial , arriving at the First ...
Página 347
... equinoctial system , hour angle may be used instead of R.A. The hour angle of a celestial body measured from the ... equinoctial FIGURE I The basis of finding terrestrial position by astronomical means is the relating of the position of ...
... equinoctial system , hour angle may be used instead of R.A. The hour angle of a celestial body measured from the ... equinoctial FIGURE I The basis of finding terrestrial position by astronomical means is the relating of the position of ...
Contenido
Preface by Alton B Moody ix | 11 |
Astronomical Methods of Timemeasuring at Sea | 32 |
The Altitudemeasuring Instruments of Navigation | 57 |
Derechos de autor | |
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Términos y frases comunes
apparent altitude astrolabe astronomical navigation azimuth calculated celestial body celestial horizon celestial meridian celestial pole celestial sphere centre chronometer computed correction cosec cosine cross-staff described difference double-altitude problem Earth eclipses equal altitude equation equinoctial error ex-meridian finding latitude finding longitude fixed stars formula given Greenwich haversines heavenly body Hipparchus hour angle instrument invention known latitude and longitude logarithms longitude at sea longitude by chronometer lunar distance Maskelyne mathematical means measuring meridian altitude meridian passage method for finding minutes of arc Moon Moon's motion Nautical Almanac nautical astronomy Nautical Magazine noon observed object observer's parallax plane polar distance Pole Star position line practical published PZX triangle quadrant refraction Right Ascension rule satellites seamen sextant ship ship's position sight sin² solution spherical triangle Sumner's method Sun's declination tion trigonometry tude values vane vers vertical zenith distance
Referencias a este libro
Cartography in France, 1660-1848: Science, Engineering, and Statecraft Josef Konvitz Vista previa limitada - 1987 |
Prologue to Lewis and Clark: The Mackay and Evans Expedition W. Raymond Wood Vista previa limitada - 2005 |