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Sight Reduction Tables for Air Navigation (selected stars) Vol. 2

Артикул: 00455246
в желания В наличии
Автор: NATIONAL IMAGERY AND MAPPING AGENCY
Издательство: NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY (все книги издательства)
Серия: Мореходная астрономия (Все книги серии)
Формат: А4 (210x290 мм)
Переплет: Мягкая обложка
Страниц: 263
Вес: 657 г
700 P
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The Sight Reduction Tables for Air Navigation consist of three volumes of comprehensive tables of altitude and azimuth designed for the rapid reduction of astronomical sights in the air. This volume (Volume 2), for latitudes 0°–40°, and Volume 3 for latitudes 39°–89°, provide for sights of the Sun, Moon, and planets; these tables are permanent. Volume 1 contains tables for selected stars for all latitudes, calculated for a specific epoch; it is intended for use for about 5 years, when it will be replaced by a new edition based on a later epoch.
The National Imagery and Mapping Agency is responsible for the compilation of these tables. The Nautical Almanac Office of the U.S. Naval Observatory and H. M. Nautical Almanac Office have cooperated in their design and preparation.
The tables are published in the United Kingdom as A.P. 3270, Sight Reduction Tables for Air Navigation.
The content and format of these three volumes may not be changed without the approval of Working Party 70 of the Air Standardization Coordinating Committee.

Description of the tables
These tables, designated as Volume 2 of the three-volume series of Pub. No. 249, Sight Reduction Tables for Air Navigation, together with the similar Volume 3, supplement Volume 1 containing tabulations for selected stars. They together contain values of the altitude (to the nearest minute) and the azimuth angle (to the nearest degree) for integral degrees of declination from 29° north to 29° south, for the complete range of latitude and for all hour angles at which the zenith distance is less than 95° (97° between latitudes 70° and the poles); provision is made for interpolation for declination. As in Volume 1, no correction for refraction has been included in the tabulated altitudes; azimuth angle is given in contrast to the azimuth for the selected stars. Volume 2 caters for latitudes 0°–40° and Volume 3 for latitudes 39°–89°; they are divided purely for convenience in handling, and are otherwise similar in all respects.
The tables have been designed for use with the Air Almanac in the reduction of sights of the Sun, Moon and planets; they may also be used for stars with declinations less than 30° north or south. A list of the 57 navigational stars, with their positions, is given on page (iii), as well as in the Air Almanac.
Their compact arrangement reflects the desire to include the maximum amount of data in the smallest practicable space. The range of declination, and the extension to negative altitudes, explains the necessity for arranging the tables across the length of the page.

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