A Treatise on Practical Astronomy: As Applied to Geodesy and Navigation |
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Page vi
... zenith distance . Form and dimensions of the earth .. Reduction of the latitude ... 100 102 .. 103 104 107 112 114 115 120 120 121 122 124 Determination of the earth's radius .... Parallax in zenith distance vi CONTENTS .
... zenith distance . Form and dimensions of the earth .. Reduction of the latitude ... 100 102 .. 103 104 107 112 114 115 120 120 121 122 124 Determination of the earth's radius .... Parallax in zenith distance vi CONTENTS .
Page vii
... zenith distance and azimuth ... Parallax in right ascension and declination .. Refraction ...... Descartes ' laws .. Bessel's formula for refraction .... Refraction in right ascension and declination .. Dip of the horizon .... CHAPTER ...
... zenith distance and azimuth ... Parallax in right ascension and declination .. Refraction ...... Descartes ' laws .. Bessel's formula for refraction .... Refraction in right ascension and declination .. Dip of the horizon .... CHAPTER ...
Page viii
... zenith distance of a star on the meridian ..... 233 By a circumpolar star observed at both upper and lower culmination .. 235 By the altitude of a star observed in any position .... 236 By circummeridian altitudes ..... 238 Gauss ...
... zenith distance of a star on the meridian ..... 233 By a circumpolar star observed at both upper and lower culmination .. 235 By the altitude of a star observed in any position .... 236 By circummeridian altitudes ..... 238 Gauss ...
Page 102
... zenith distance of a star is fre- quently used ; this is simply the distance from the zenith to the star , measured on a great circle . The zenith distance and altitude are complements of each other . We shall use the following notation ...
... zenith distance of a star is fre- quently used ; this is simply the distance from the zenith to the star , measured on a great circle . The zenith distance and altitude are complements of each other . We shall use the following notation ...
Page 105
... distance north or south of the ecliptic measured on a secondary to the ... zenith , CVT the ecliptic , WVE the equator , O the position of any star ... Zenith distance , z ; = PON . P. distance , p . H S FIG . I. 62. The following diagram ...
... distance north or south of the ecliptic measured on a secondary to the ... zenith , CVT the ecliptic , WVE the equator , O the position of any star ... Zenith distance , z ; = PON . P. distance , p . H S FIG . I. 62. The following diagram ...
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Common terms and phrases
accuracy altitude angle applied approximation arithmetical mean ascension and declination axis azimuth Bessel catalogue celestial sphere centre chronograph chronometer circle circumpolar stars clamp co-ordinates coefficients collimation computation constant convenient culmination determined difference differential dt dt earth east ecliptic elongation emersion ephemeris equal example follows formulæ geocentric given gives Greenwich horizon hour-angle instant latitude limb logarithms longitude mean solar measured meridian method micrometer middle thread moon moon's right ascension multiplied Nautical Almanac obtained occultation parallax plane position prime vertical probable error proper motion reading reduced refraction right ascension screw semidiameter sextant sidereal sin² star's stars observed Substituting subtract telescope tion transit instrument unknown quantities values vernier weight write zenith distance ΙΟ
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