Direction of a LineG. Wahr, 1910 - 47 pàgines |
Altres edicions - Mostra-ho tot
Direction of a Line: A Paper Read Before the Michigan Engineering Society at ... Joseph Baker Davis Previsualització no disponible - 2017 |
Frases i termes més freqüents
A₁ Angle of Bearing Angle or Azimuth appears to pass axis of daily AZIMUTH AND ALTITUDE celestial object celestial sphere Chauvenet compass ring compass sight completing the group computation cos b cos cos C sin cot ½ cross wires daily path daily rotation deviation diedral whose edge earth Ecliptic Ephemeris equations in groups equations similar equinoctial colure Greek alphabet horizon hour angle indefinitely extended instrument lantern lines O A mean solar mean sun meridian north end O A or O C O-ABC perpendicular place of observation plane A O B plane angle plane face angle planes of reference plumb line polar distance pole reference line right angled right ascension sin c cos solar day Spherical Right Triangles spherical triangle Spherical Trigonometry stake star system of coordinates tangent tion Traverse Angle Triangle PO H triedral true bearing Ursae Minoris vernal equinox vertical circle vertical line western elongation zenith
Passatges populars
Pàgina 15 - A cos 6 = cos a cos c + sin a sin c cos B cos c = cos a cos 6 + sin a sin 6 cos C Law of Cosines for Angles cos A = — cos B...
Pàgina 28 - ... is 11 hours 58 minutes. Astronomical time, or Local Mean Solar time, is the time that would be kept by the mean sun and is obtained from Standard, or railroad time, by adding or subtracting 4 minutes for each degree of longitude that the place of observation is east or west of the Standard Meridian. The Astronomical day begins at noon of the civil day of the same date, and is reckoned from zero to 24 hours. The Hour Angle of Polaris is found by subtracting the correct Local Mean Solar time of...
Pàgina 28 - A sidereal day is the interval between two successive upper transits of the vernal equinoctial point, and begins when the vernal equinoctial point is on the meridian.
Pàgina 23 - In figure 45 suppose A to be the position of an observer whose height above the level of the sea is AB. CAZ is the true vertical at the position of the observer, and AH is the direction of the true horizon, S being an observed heavenly body. Draw ATH...
Pàgina 13 - C en resp. zijden a, b en c geldt de sinusregel: sin a sin B = sin b sin A sin b sin C = sin c sin B sin c sin A = sin a sin...
Pàgina 14 - B cos a, sin 4 cos c = sin B cos C + cos B sin C cos a, sin B cos c = sin A cos C + cos A sin C cos b, sin B cos a = sin C cos A + cos C sin A cos...
Pàgina 16 - Xo additional relations are developed by other transformations. sin A cot B = sin c cot b — cos c cos A.
Pàgina 26 - Two reference planes are commonly used; the plane of the ecliptic is the plane of the Earth's orbit about the Sun and the equatorial plane is the plane normal to the Earth's axis of rotation, through the center of the Earth.
Pàgina 26 - The plane of the ecliptic passes through the center of the earth and is a great circle of the celestial sphere.
Pàgina 19 - It is commonly reckoned from the north point of the horizon, either to the east, or to the west, but in some work it is reckoned from the south.