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Himawari-8/9HimawariStandardDataUser'sGuideVersion1.031October,2013JapanMeteorologicalAgency1-3-4Otemachi,Chiyoda-ku,Tokyo,100-8122JapanDocumentationChangeRecordIssue/revisionDateDescriptionVersion1.031October,2013OriginaleditioniContents1.Introduction.....................................................................................................p.12.ObservationAreas............................................................................................p.23.MapProjectionMethod....................................................................................p.54.FileNamingConvention..................................................................................p.65.HimawariStandardFormat(Version1.0)..........................................................p.86.Back-upOperationbyHimawari-7(MTSAT-2).........................................p.18ii1.IntroductionTheJapanMeteorologicalAgency(JMA)planstobegintheoperationofitsHimawari-8satellitein2015andbackup-operationbyitsHimawari-9satellitein2017,withbothunitsscheduledtocontinueobservationuntil2030.TheinformationderivedfromthesatelliteswillbeprocessedtocreateHimawariStandardDatainHimawariStandardFormatasmasterdataforallproductsrelatedtoinformationfromHimawari-8and-9.HimawariStandardDatawillbeprovidedforeachobservation(seeSection2)andeachband(seeTable1).Note:IntheeventofaHimawari-8failurebeforeHimawari-9entersstand-byorbit,HimawariStandardDatawillbeprovidedusinginformationfromHimawari-7(MTSAT-2)(seeSection6).Table1Himawari-8and-9observationbandsBandnumberCentralwavelength[μm](nominalvalues)10.4620.5130.6440.8651.662.373.986.297.0107.3118.6129.61310.41411.21512.31613.3-1-2.ObservationAreasHimawari-8and-9willeachcarryanAdvancedHimawariImager(AHI)scanningfiveareas:FullDisk(imagesofthewholeEarthasseenfromthesatellite),theJapanArea(Regions1and2),theTargetArea(Region3)andtwoLandmarkAreas(Regions4and5).WhilethescanrangesforFullDiskandtheJapanAreawillbepreliminarilyfixed,thoseoftheTargetAreaandLandmarkAreaswillbeflexibletoenablepromptreactiontometeorologicalconditions.AtthebeginningofHimawari-8’soperation,LandmarkAreadatawillbeusedonlyfornavigation,andarenotintendedforuseassatelliteproducts.Inthefuture,JMAplanstouseRegion5forobservationofphenomenasuchasrapidlydevelopingcumulonimbuscloudsandtoprovidetheresultingdatatousers.Ineach10-minuteperiod,theAHIwillscantheFullDiskonce,theJapanAreaandTargetAreafourtimes,andthetwoLandmarkAreastwentytimes.These10-minutedivisionsarebasicunitsofanobservationschedulecalledatimeline.InHimawari-8and-9’sbaselineobservation,thetimelinewillberepeatedevery10minutesexceptintheirhousekeepingoperation.TheobservationareasandfrequenciesareshowninTable2,andscanimagesonatimelineareshowninFigure1.TheobservationareasandnumbersofpixelsareshowninTable3(pixelnumbersforregionalobservationsmaybechangedinorbittestingafterlaunch).-2-Table2Himawari-8and-9observationareasandfrequenciesObservationareaObservationspertimelineTimecycle[min.]ObservationsperdayFullDiskFixed110144JapanArea(Region1+Region2)Fixed42.5576TargetArea(Region3)Flexible42.5576LandmarkArea(Region4)Flexible200.52,880LandmarkArea(Region5)Flexible200.52,880Figure1Himawari-8and-9scanimagesonatimeline-3-Table3Himawari-8and-9observationareasandnumbersofpixelsObservationareaBandnumber(seeTable1)SpatialresolutionatSSP(subsatellitepoint)1[km]NumbersofpixelsEast-westdirectionNorth-southdirectionFullDisk30.522,00022,0001,2,4111,00011,0005–1625,5005,500JapanArea(Region1+Region2)30.56,0004,8001,2,413,0002,4005–1621,5001,200TargetArea(Region3)30.52,0002,0001,2,411,0001,0005–162500500LandmarkArea(Region4)30.52,0001,0001,2,411,0005005–162500250LandmarkArea(Region5)30.52,0001,0001,2,411,0005005–162500250(DuringbackupoperationbyHimawari-7(MTSAT-2))FullDiskVIS111,00011,000IR1–442,7502,750(DuringbackupoperationbyHimawari-7(MTSAT-2))HalfDiskVIS111,0005,500IR1–442,7501,3751ThepointofintersectionbetweenthesurfaceoftheEarthandastraightlineconnectingthesatelliteandtheEarth’scenter-4-3.MapProjectionMethodForHimawariStandardData,NormalizedGeostationaryProjectionisadoptedasdefinedinLRIT/HRITGlobalSpecification2Section4.4.Theprojectiondescribestheviewfromthesatellitetoanidealizedearth.TheparametersofthegeographiccoordinatesystemusedforHimawariStandardDataarebasedonWGS84(WorldGeodeticSystem1984)3asrecommendedinETSAT6/Doc.16(1)ImplicationsofUsingtheWorldGeodeticSystem1984(WGS84)4.2LRIT/HRITGlobalSpecification,CGMS,2013://earth-info.nga.mil/GandG/wgs84/4(CoordinatedUniversalTime).Note:Observationdatamaybedividedintosegmentfilesasneeded(seeTable4kkll).Thegeneralfilenameformatis:HS_aaa_yyyymmdd_hhnn_Bbb_cccc_Rjj_Skkll.DATTable4DefinitionsofItalicsinthefilenamegeneralfo