外文翻译--基于GPS的电离层监测及延迟的高精度改正的理论与方法的研究.doc

外文原文Recently,accordingtotherequirementsofsomeimportantGPSresearchsubjectsinthefieldsofGeodesy,Geophysics,Space-PhysicsandnavigationinChina,westudiedsystematicallyhowtocorrectingtheeffectsoftheionosphereonGPS,withhigh-,theresearchprojectsfocusmainlyonhowtoimproveGPSsurveyingbyreducingionosphericdelayfordual/singlefrequencykinematic/staticusers:uracycorrectionofionosphericdelayforsingle/dualfrequencyGPSusersontheearthandinspace,ChinaWAASionosphericmodelingandthetheoryandmethodofmonitoringofionosphereusingGPS. :Fisrtpart------themaincontributionandresearchresultsofthispaperarefocusedonasfollows:(1)heionosphericdelaycorrectionmodelforsinglefrequencyGPSofalocalrange;(2)   HowtoseparatetheinstrumentalbiaseswiththeionosphericdelaysinGPSobservation;(3)worktoinvestigatethechangelawofionosphericTECof Chinaarea;(4)HowtoimprovetheeffectivenessofcorrectingionosphericdelaysforWAAS’susersunderadverseconditions.(5)HowtoestablishthebasictheoryandthecorrespondingframeworkofmonitoringthestochasticionosphericdisturbanceusingGPS(6)ordingtoitsdiurnal,seasonal,annualvariationsbasedonGPS;(7)Howtomeetthedemandofcorrectingtheionosphericdelayof high-precisionorbitdeterminationforlow-earthsatelliteusingasinglefrequencyGPSreceiver1 Extracting(local)ionosphericinformationfromGPSdatawithhigh-:(1)Basedonasimplemodelwithconstantnumberofparameters,whichconsistsofasetoftrigonometricseriesfunctions,,thenew