the air almanac

3/2/2015 The Air Almanac http://aa.usno.navy.mil/publications/docs/aira.php 1/1 The Air Almanac contains the astronomical data required for air celestial navigation. The book provides the following data tabulated at 10minute intervals to a precision of 1 arcminute: the Greenwich hour angle and declination of the Sun, Moon, and three navigational planets; the Greenwich hour angle of Aries; rise and set times of the Moon for a range of latitudes; and other data. Each edition also contains sky diagrams for each month; sunrise, sunset, and twilight tables; and positions of the navigational stars. The Air Almanac is available nine months in advance of its edition date. Beginning with the 2008 edition, The Air Almanac is available only in PDF format. It is expected that those requiring a paper copy of certain pages will have access to a printer. Starting with the 2015 edition, users may download the entire almanac free of charge, although the CD is still available for purchase through the Government Printing Office (GPO). Two versions are available. The file airaYY.pdf is the entire publication in one large PDF file. The file airaYY_cd.zip also contains the entire publication in PDF format, but uses your web browser to navigate through the pages. The .zip file is virtually identical to the CD sold by GPO. Editions of The Air Almanac Available for Download Year Title Link File Size 2015 aira15_all.pdf 59.5 MBytes 2015 aira15_cd.zip 49.5 MBytes Some links of interest for The Air Almanac: The Air Almanac Errata page contains information on errors in the publication. The history of The Air Almanac is found here. Ordering Information contains instructions on how to order The Air Almanac. The Depository Libraries around the United States retain a reference copy for each year of publication. THE AIR ALMANAC

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The Air Almanac contains the astronomical data required for air celestial navigation. A description of the document is provided.

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3/2/2015 TheAirAlmanac

http://aa.usno.navy.mil/publications/docs/aira.php 1/1

TheAirAlmanaccontainstheastronomicaldatarequiredforaircelestialnavigation.Thebookprovidesthefollowingdatatabulatedat10minuteintervalstoaprecisionof1arcminute:theGreenwichhourangleanddeclinationoftheSun,Moon,andthreenavigationalplanetstheGreenwichhourangleofAriesriseandsettimesoftheMoonforarangeoflatitudesandotherdata.Eacheditionalsocontainsskydiagramsforeachmonthsunrise,sunset,andtwilighttablesandpositionsofthenavigationalstars.TheAirAlmanacisavailableninemonthsinadvanceofitseditiondate.

Beginningwiththe2008edition,TheAirAlmanacisavailableonlyinPDFformat.Itisexpectedthatthoserequiringapapercopyofcertainpageswillhaveaccesstoaprinter.Startingwiththe2015edition,usersmaydownloadtheentirealmanacfreeofcharge,althoughtheCDisstillavailableforpurchasethroughtheGovernmentPrintingOffice(GPO).Twoversionsareavailable.ThefileairaYY.pdfistheentirepublicationinonelargePDFfile.ThefileairaYY_cd.zipalsocontainstheentirepublicationinPDFformat,butusesyourwebbrowsertonavigatethroughthepages.The.zipfileisvirtuallyidenticaltotheCDsoldbyGPO.

EditionsofTheAirAlmanacAvailableforDownload

Year Title Link FileSize

2015 aira15_all.pdf 59.5MBytes

2015 aira15_cd.zip 49.5MBytes

SomelinksofinterestforTheAirAlmanac:

TheAirAlmanacErratapagecontainsinformationonerrorsinthepublication.ThehistoryofTheAirAlmanacisfoundhere.OrderingInformationcontainsinstructionsonhowtoorderTheAirAlmanac.TheDepositoryLibrariesaroundtheUnitedStatesretainareferencecopyforeachyearofpublication.

THEAIRALMANAC