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1、ARTICLEINPRESSPlanetaryandSpaceScience54(2006)441–455www.elsevier.com/locate/pssThemagneticfieldexperimentIMSCanditsdataprocessingonboardDEMETER:Scientificobjectives,descriptionandfirstresultsa,bcdbaaM.Parrot,D.Benoist,J.J.Berthelier,J.B"ecki˛,Y.Chapuis,F.Colin,F.
2、Elie,aaaaaaP.Fergeau,D.Lagoutte,F.Lefeuvre,C.Legendre,M.Le´veˆque,J.L.Pinc-on,aaaB.Poirier,H.-C.Seran,P.ZamoraaLPCE/CNRS,3AAvenuedelaRechercheScientifique,45071Orle´anscedex2,FrancebStationderadioastronomiedeNanc-ay18330Nanc-ay,FrancecCETP,ObservatoiredeSaintMaur
3、,4AvenuedeNeptune,94107SaintMaurdesFosse´scedex,FrancedSpaceResearchCentrePAS,Bartycka18A,00-716Warsaw,PolandReceived10December2004;receivedinrevisedform12April2005;accepted14October2005Availableonline24March2006AbstractThispaperisrelatedtothepresentationofthema
4、gneticfieldexperimentIMSC,andtothedescriptionoftheelectronicblocknamedBANTonboardthemicro-satelliteDEMETER.ThemainscientificobjectiveoftheDEMETERmissionisrelatedtothestudyoftheionosphericperturbationsinrelationwiththeseismicandvolcanicactivities.Thereareseveralhyp
5、othesestoexplaintheseionosphericperturbationsandonegoalistounderstandtherightgenerationmechanism.Thesamescientificpayloadwillallowustostudytheionosphericperturbationsinrelationwiththeanthropogenicactivities.Intotal,DEMETERwillperformacomprehensivestudyoftheEarthe
6、lectromagneticenvironmentatthealtitudeofthesatellite.OnboardDEMETER,allscientificexperimentsarefirstprocessedbytheelectronicmoduleBANTwhichisconnectedtoanonboardmemory.ThefunctionsofBANTwillbedescribed,andthefirstresultsofIMSCwillbepresented.r2006ElsevierLtd.Allrig
7、htsreserved.Keywords:Electromagneticwaves;Ionosphere;Seismicactivity1.Introductionbecausetheyoccurbetweenafewhoursandafewdaysbeforetheshock,andthen,theycanbeconsideredasshort-ThemainscientificobjectivesoftheDEMETERtermprecursors.Buttheproblemofelectromagneticeffe
8、ctsexperimentsaretostudythedisturbancesoftheionospherecorrelatedwithearthquakesiscomplex,notonlybecauseduetotheseismo-electromagneticeffects,andduetothegenerationmech