The American Ephemeris and Nautical AlmanacU.S. Government Printing Office, 1915 |
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Page xv - Supplementary Investigation in 1909 of the Figure of the Earth and Isostasy, US Coast and Geodetic Survey, 1910, and adopted by the Paris Conference, October, 1911.
Page 622 - UNIVERSAL TIME OR GREENWICH CIVIL TIME NOTATION i=the ratio of the area of the illuminated portion of the apparent disk to the area of the entire apparent disk regarded as circular.
Page iii - Provided further, That the work of the Nautical Almanac Office during the continuance of any such arrangement shall be conducted so that in case of emergency the entire portion of the work intended for the use of navigators may be computed by the force employed by that office, and without any foreign cooperation whatsoever: Provided...
Page xx - Descending Node. N. North. S. South. E. East. W. West. Degrees. Minutes of Arc. Seconds of Arc. Hours. Minutes of Time. Seconds of Time. PART L ASTRONOMICAL EPHEMERIS FOR THE MERIDIAN OF GREENWICH. 39393°— 1917 1 FOR GREENWICH MEAN NOON a» •si Apparent flight Ascension.
Page 714 - Jan. 0 give tho corrections to be applied to the co-ordinates for noon in order to obtain the corresponding co-ordinates referred to the mean equator and the mean equinox of January 0. Pages 272 — 275 give the longitude and latitude of the moon for every Greenwich mean noon and midnight.
Page 710 - The civil day begins twelve hours before the astronomical day; therefore the first period of the civil day answers to the last part of the preceding astronomical day, and the last part of the civil day corresponds to the first part of the astronomical day. Thus, January 9, 2 o'clock pm, civil time, is...
Page 557 - CIRCUMSTANCES OF THE ECLIPSE. Moon enters penumbra Moon enters shadow Total eclipse begins Middle of the eclipse Total eclipse ends Moon leaves shadow Moon leaves penumbra July Greenwich Mean Time.
Page 658 - In the diagram on the preceding page, the points of the orbits marked "0" are those of the eastern elongation, as seen in an inverting telescope. The times of these elongations may be found from the following tables, and the apparent position of a satellite at any other time...
Page 714 - ... obtained by applying the longitude converted into time, to the local mean time of the observer. The right ascension or declination is taken out for the day and hour of the Greenwich mean time; the Diff.
Page iii - Office during the continuance of any such arrangement shall be conducted so that in case of emergency the entire portion of the work intended for the use of navigators may be computed by the force employed by that office, and without any foreign cooperation whatsoever: Provided further, That any employee of the Nautical Almanac Office who may be authorized in any annual appropriation bill and whose services in whole or in part can be spared from the duty of preparing for publication the annual volumes...