Integration of Global Positioning System (GPS)

TP13737EIntegrationofGlobalPositioningSystem(GPS)InformationintoanEmergencyLocatorTransmitter(ELT)PreparedfortheTransportationDevelopmentCentreSafetyandSecurityTransportCanadaFEBRUARY2001TP13737EIntegrationofGlobalPositioningSystem(GPS)InformationintoanEmergencyLocatorTransmitter(ELT)byW.StreetNorthernAirborneTechnologyLtd.FEBRUARY2001iiThisreportreflectstheviewsoftheauthorsandnotnecessarilythoseoftheTransportationDevelopmentCentre.TheTransportationDevelopmentCentredoesnotendorseproductsormanufacturers.Tradeormanufacturers'namesappearinthisreportonlybecausetheyareessentialtoitsobjectives.Sincesomeoftheacceptedmeasuresintheindustryareimperial,metricmeasuresarenotalwaysusedinthisreport.Unsommaireenfrançaissetrouveavantlatabledesmatières.TransportCanadaTransportsCanadaPUBLICATIONDATAFORM1.TransportCanadaPublicationNo.TP13737E2.ProjectNo.93943.Recipient’sCatalogueNo.4.TitleandSubtitle5.PublicationDateFebruary20016.PerformingOrganizationDocumentNo.7.Author(s)W.Street8.TransportCanadaFileNo.ZCD1455-189-59.PerformingOrganizationNameandAddress10.PWGSCFileNo.XSB-7-0073611.PWGSCorTransportCanadaContractNo.T8200-7-7589/001/XSB12.SponsoringAgencyNameandAddress13.TypeofPublicationandPeriodCoveredFinal14.ProjectOfficerHowardPosluns15.SupplementaryNotes(Fundingprograms,titlesofrelatedpublications,etc.)Co-sponsoredbytheNationalSearchandRescueSecretariat’sNewInitiativesFund16.Abstract17.KeyWordsEmergencyPositionIndicatingRadioBeacon,EPIRB,GlobalPositioningSystem,GPS,SearchandRescue18.DistributionStatementLimitednumberofcopiesavailablefromtheTransportationDevelopmentCentre19.SecurityClassification(ofthispublication)Unclassified20.SecurityClassification(ofthispage)Unclassified21.Declassification(date)—22.No.ofPagesx,2323.PriceShipping/HandlingCDT/TDC79-005Rev.96iiiIntegrationofGlobalPositioningSystem(GPS)InformationintoanEmergencyLocatorTransmitter(ELT)NorthernAirborneTechnologyLtd.#14-1925KirschnerRoadKelowna,B.C.CanadaV1Y4N7TransportationDevelopmentCentre(TDC)800RenéLévesqueBlvd.WestSuite600Montreal,QuebecH3B1X9Althoughgeostationarysatellitescanimmediatelydetecta406MHzdistresssignaltransmittedbyanEmergencyLocatorTransmitter(ELT),theycannotdeterminethelocationofthetransmittingbeacon.IfGlobalPositioningSystem(GPS)informationwereincludedonthe406MHzmessage,thesatellitescoulddecodethelocationdataimmediately,thusreducingtheoveralltimerequiredtocompletearescueoperation.ThisreportdiscussestwodesignapproachestointegratingGPStechnologyand406MHzELTtechnology,andpresentsthefinaldesignconcept.BecauseGPSsystemsarealreadyinstalledonmostaircraft,theadvantagesofdownloadingtheaircraft'snavigationdataintotheELToutweighthoseofintegratingaGPSreceiverintotheELT.Theseadvantagesincludetheabilitytotransmitpositiondataonthefirst406MHzburst,theinherentlowerinstalledcost,andthereducedriskofpotentialinterferencefromVHFtransmitters.Althoughnavigationinterfaceequipmentiscommerciallyavailable,theseunitsarelargeandbulky.ThenavigationinterfacecircuitsmustbeminiaturizedtofitinsidetheELT.ModificationsweremadetotheprototypeELTelectronicsandmechanicstoallowaircraftnavigationdatatobecontinuouslydownloadedviaintegratednavigationinterfacecircuitsintheELTwhiletheaircraftisinoperation.ThisnewELTwithGPSinterfacecapabilitieswassubmittedtothetestlaboratoryinToulouse,FranceandissuedCospas-SarsatTypeApprovalCertificate#120.TransportsCanadaTransportCanadaFORMULEDEDONNÉESPOURPUBLICATION1.NodelapublicationdeTransportsCanadaTP13737E2.Nodel’étude93943.Nodecataloguedudestinataire4.Titreetsous-titre5.DatedelapublicationFévrier20016.Nodedocumentdel’organismeexécutant7.Auteur(s)W.Street8.Nodedossier-TransportsCanadaZCD1455-189-59.Nometadressedel’organismeexécutant10.Nodedossier–TPSGCXSB-7-0073611.Nodecontrat–TPSGCouTransportsCanadaT8200-7-7589/001/XSB12.Nometadressedel’organismeparrain13.GenredepublicationetpériodeviséeFinal14.AgentdeprojetHowardPosluns15.Remarquesadditionnelles(programmesdefinancement,titresdepublicationsconnexes,etc.)ProjetcoparrainéparleFondsdesnouvellesinitiativesduSecrétariatnationalRechercheetsauvetage16.Résumé17.MotsclésRadiobalisedelocalisationdesinistres,EPIRB,systèmedepositionnementglobal,GPS,rechercheetsauvetage18.DiffusionLeCentrededéveloppementdestransportsdisposed’unnombrelimitéd’exemplaires.19.Classificationdesécurité(decettepublication)Nonclassifiée20.Classificationdesécurité(decettepage)Nonclassifiée21.Déclassification(date)—22.Nombredepagesx,2323.PrixPortetmanutentionCDT/TDC79-005Rev.96ivIntegrationofGlobalPositioningSystem(GPS)InformationintoanEmergencyLocatorTransmitter(ELT)NorthernAirborneTechnologyLtd.#14-1925KirschnerRoadKelowna,B.C.CanadaV1Y4N7Centrededéveloppementdestransports(CDT)800,boul.René-LévesqueOuestBureau600Montréal(Québec)H3B1X9Lessatellitesgéostationnairespeuventdétecterinstantanémentunsignaldedétresseémisparuneradiobalise406MHz,maisilsnepeuventdéterminerl’endroitd’oùprovientlesignal.SidesdonnéesGPSétaientintégréesausignaldelaradiobalise,lessatellitespourraientdécoderimmédiatementl’emplacementdecelle-ci,cequipermettraitderéduir