A Treatise on Practical Astronomy: As Applied to Geodesy and Navigation |
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Page ix
... Directions for observing ... 481 484 48- Value of micrometer screw . 488 Value of micrometer when level is not known .. 493 General formulæ for latitude ...... .. 501 The corrections for micrometer , level , and refraction .. 502 ...
... Directions for observing ... 481 484 48- Value of micrometer screw . 488 Value of micrometer when level is not known .. 493 General formulæ for latitude ...... .. 501 The corrections for micrometer , level , and refraction .. 502 ...
Page 70
... directions . In what follows we shall suppose the values of the function given for equidistant values of the argument , which will always be the case practically . Also the intervals must be small enough , so that the function will be ...
... directions . In what follows we shall suppose the values of the function given for equidistant values of the argument , which will always be the case practically . Also the intervals must be small enough , so that the function will be ...
Page 78
... direction of the one in the same vertical column immediately bo it . Special Cases . 45. Whenever ( 92 ) , or ( 93 ) , can be applied , nothing more will be necessary ; they require , however , a knowledge of the value of the function ...
... direction of the one in the same vertical column immediately bo it . Special Cases . 45. Whenever ( 92 ) , or ( 93 ) , can be applied , nothing more will be necessary ; they require , however , a knowledge of the value of the function ...
Page 82
... ) ( n − 3 ) ( n − 4 ) ƒv ( T — §w ) . ( 97 ) , 1.2.3.4.5 1ƒœ ( I — of these applies for interpolating in the direction in which the argument increases . The above may 82 847 . INTERPOLATION . Arguments near end of table...............
... ) ( n − 3 ) ( n − 4 ) ƒv ( T — §w ) . ( 97 ) , 1.2.3.4.5 1ƒœ ( I — of these applies for interpolating in the direction in which the argument increases . The above may 82 847 . INTERPOLATION . Arguments near end of table...............
Page 83
As Applied to Geodesy and Navigation Charles Leander Doolittle. direction in which the argument increases . The above may be written as follows : decreases } ƒ ( T + nw ) = f ( T ) + n { ƒ ' ( T + & w ) + n + I + . + 3 n + 35 5 + n { n ...
As Applied to Geodesy and Navigation Charles Leander Doolittle. direction in which the argument increases . The above may be written as follows : decreases } ƒ ( T + nw ) = f ( T ) + n { ƒ ' ( T + & w ) + n + I + . + 3 n + 35 5 + n { n ...
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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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