Practical Astronomy and Geodesy: Including the Projections of the Sphere and Spherical Trigonometry. For the Use of the Royal Military CollegeLongman, Brown, Green, and Longmans, 1845 - 427 pages |
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Page xi
... let fall perpendicularly on the other , also from the same point an arc of a small circle perpendicular to both being described ; there are inves- tigated approximative formulæ for the distance between the two arcs and the difference of ...
... let fall perpendicularly on the other , also from the same point an arc of a small circle perpendicular to both being described ; there are inves- tigated approximative formulæ for the distance between the two arcs and the difference of ...
Page xxvi
... let fall on it from the stations 408. Processes for measuring a degree of a great circle perpendi- cular to the meridian , and a degree on a parallel of geo- graphical latitude . - - - · 369 370 373 376 409. Method of finding the ...
... let fall on it from the stations 408. Processes for measuring a degree of a great circle perpendi- cular to the meridian , and a degree on a parallel of geo- graphical latitude . - - - · 369 370 373 376 409. Method of finding the ...
Page 7
... fall upon the earth at the two stations A and B may be con- sidered as parallel to one another , let the plane of the paper represent that of a terrestrial meridian , whose circumference passes through the stations , and let Aa , Bb ...
... fall upon the earth at the two stations A and B may be con- sidered as parallel to one another , let the plane of the paper represent that of a terrestrial meridian , whose circumference passes through the stations , and let Aa , Bb ...
Page 10
... let fall in the directions of normals , or perpendiculars , to the earth's surface , a curve line supposed to join the points in which the normals meet that surface will be the correct terrestrial meridian ; and if the earth be not a ...
... let fall in the directions of normals , or perpendiculars , to the earth's surface , a curve line supposed to join the points in which the normals meet that surface will be the correct terrestrial meridian ; and if the earth be not a ...
Page 35
... Let fall PR perpendicularly on AB ; then the angle PCB , being 45 degrees , PR and CR ( the sine and cosine of 45 ° ) are each equal to , and ER = 2 + 1 ; also EC = √ 1⁄2 + 1. Now the triangles ERP and ECp being similar to one another ...
... Let fall PR perpendicularly on AB ; then the angle PCB , being 45 degrees , PR and CR ( the sine and cosine of 45 ° ) are each equal to , and ER = 2 + 1 ; also EC = √ 1⁄2 + 1. Now the triangles ERP and ECp being similar to one another ...
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Practical Astronomy and Geodesy: Including the Projections of the ..., Volume 5 John Narrien No preview available - 2016 |
Common terms and phrases
angular distance apparent ascension and declination astronomical azimuth bisected celestial body celestial sphere centre circle passing circumference colatitude computed considered correction corresponding cosine cotan degrees described determined diameter difference earth ecliptic ellipse equal equator equatorial equinoctial point expressed fixed star formula geocentric given graduation Greenwich Greenwich mean horary motions horizontal parallax hour angle index error instant instrument interval latitude latter let fall limb longitude mean noon meridian micrometer moon moon's Nautical Almanac node observed altitude obtained optical axis orbit parallax parallel perihelion perpendicular plane passing polar distance pole position projection radius refraction represented revolution revolve right angles right ascension satellite screw sector semidiameter side sidereal sidereal clock sine sphere spherical triangle star's station subtended subtracted supposed surface tangent transit telescope true variation vertical wire zenith distance zero
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