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