A Treatise on Practical Astronomy: As Applied to Geodesy and Navigation |
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Page ix
... known .. 493 General formulę for latitude ...... .. 501 The corrections for micrometer , level , and refraction .. 502 Reduction to the meridian ... ... 504 Combination of individual values of the latitude ... 507 Value of micrometer ...
... known .. 493 General formulę for latitude ...... .. 501 The corrections for micrometer , level , and refraction .. 502 Reduction to the meridian ... ... 504 Combination of individual values of the latitude ... 507 Value of micrometer ...
Page 8
... known , and this can best be determined by considering a particular case . As this func- tion is strictly general , if we have once determined its form in a special case the result will be applicable to all cases . We have assumed as an ...
... known , and this can best be determined by considering a particular case . As this func- tion is strictly general , if we have once determined its form in a special case the result will be applicable to all cases . We have assumed as an ...
Page 10
... known as the gamma function . For the purpose of integrating the expression , place n4 = t . Then d4 = dt I ' and we have I = 00 с 12 e 2dt = 100- +8 81 e - dt . As in this expression is involved only in the quadratic form , we ...
... known as the gamma function . For the purpose of integrating the expression , place n4 = t . Then d4 = dt I ' and we have I = 00 с 12 e 2dt = 100- +8 81 e - dt . As in this expression is involved only in the quadratic form , we ...
Page 14
... known becomes known , and conversely . r II . It is evident that the equation for hr can only be solved approximately , as the expression e - hd is not directly integrable . The only method of solution is to com- pute a series of ...
... known becomes known , and conversely . r II . It is evident that the equation for hr can only be solved approximately , as the expression e - hd is not directly integrable . The only method of solution is to com- pute a series of ...
Page 15
... known as the method of Mechanical Quadratures . As very complete tables of numerical values of this integral have been many times computed , we shall simply refer to the tabular quantities without entering more fully into the methods of ...
... known as the method of Mechanical Quadratures . As very complete tables of numerical values of this integral have been many times computed , we shall simply refer to the tabular quantities without entering more fully into the methods of ...
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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 formulę 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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