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1、RESEARCHUSINGVLFM[ETHoDTOPREDICTSOLARENERGETICPmICLESSEDIMENTATIONADissertationSubmittedtotheGraduateSchoolofHenanNormalUniversityinPartialFulfillmentoftheRequirementsfortheDegreeofMasterofEngineeringScienceByLiLingSuper

2、visor：ProfNiuYoutianMay2015ABSTRACTSolarenergeticparticlessedimentationisgreatharmtotheearthanditissignificancetOtakeaneffectiven地a翻且mtopredictthesolarenergeticparticlessedimentationeventAimingatthedefectsoftheforecastin

3、gmethodofsolarenergeticparticlessedimentationintheword，presentsusingthemethodofverylowfrequencywhichcostislowerandphaseislessaffectedbyweathertopredictthesolarenergeticparticlessedimentationeventAlargeamountofX—rayswillb

4、ereleasedduringtheflareburstItwilldestroythedegreeofionizationofionospheresDlayerresultinginthereductionofequivalentheightsoflowionosphereandleadingtosuddenphaseanomaly(SPA)phenomenonofverylowfrequency(VLF)signalThispape

5、rusetheanomalyamplitudeofVLFsignalphasetointurnderivedthevariationofequivalentheightsforlowionosphere，andthentojudgethepeakflowsofXrayswhensolarflareOC：cUlFinallyaccoMingtothecorrelationbetweensolarflareandhighenergypart

6、iclessedimentationevent，theOCCUFrenccofsolarenergeticparticleseventwillbepredictedThehappenedtimesandamplitudesofSPAphenomenonofVLFsignalson1991whichobservedonthepathsofGandEstationofOmeganavigationsystemtoZhongshanStati

7、onofAntarctic，havebeengiveninthisarticleBycomparingandanalyzingthemwiththeocculTenceofsolarflareswhichobservedbyGOESsatelliteandpublishedbyNationalGeophysicalDataCenterinUS，findthatwhenapartoftheVLFsignalobservationpathi

8、sinthedaytime，thephaseisverysensitivetotheOCCUFrerlceofsolarflareItalsoobservesthatthephaseanomalytimeofVLFsignalisalmostsynchronouswiththehappenedtimeofsolarflare，andthephaseanomalyamplitudeispositivelyrelatedwiththelev

9、elofsolarflareThroughtheph髂eanomalyamplitudesofⅥJsignals，itcancalculatetheequivalentheights’decreasedmountoflowionosphereandthenusingleastsquaresmethodinMATLABtofitthecorrelationbetweentheequivalentheights’decreasedamoun

10、tsandthepeakflowsofXraysTheresultshowsthatthereisallexponentialrelationshipbetweenthemThoughcomparingand眥Iy五ngthe00蝴ceofsolarflaresandhighenel苫ryparticlessedimentationwhichobservedbythetwomethodofVLEshowsthatthesp∞dofsol

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