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1、遥感原理与应用考试填空题（Theprincipleofremotesensingandtheapplicationoftheapplicationtest）1.Fillintheblanks1.VDOPrepresentstheverticalcomponentprecisionfactor2.PDOPrepresentsthespatialpositiongraphicsstrengthfactor3.GPSandGLONASSarecurrentlyrunningtheglobalsatellitenavigatio
2、nandpositioningsystem.InourcountryThefirstsatellitenavigationandpositioningsystemiscalledbeidousatellitenavigationandpositioningsystemThesatellitenavigationsystemiscalledGALILEO.4.ThesignalsentbyGPSsatelliteiscomposedofcarrier,rangingcodeandnavigationmessage.Inea
3、rlyMay2000,theU.S.governmentsuspendedtheSApolicyformanyyears.6.L1carrierhasawavelengthofabout19cmandtheL2carrierhasawavelengthofabout24cm.7.GPSpositioningerrorisclassifiedaccordingtothesourceoferror,andtheerrorassociatedwiththesatellitehassatelliteephemeriserror,
4、Satelliteclockandrelativisticeffects;Theerrorassociatedwithsignaltransmissionhasanionospheredelayerror,Troposphericdelayerrorandmulti-patherror;ThereisareceiverclockdifferencebetweenthereceiverandthereceiverPositionerrorofreceiverandmeasurementnoiseofreceiver.8.T
5、hesinglestationdifferenceGPSisdividedbytheinformationmethodsentbythebasestation,whichcanbedividedintopositiondifference,pseudodistancedifferenceandphasedifference.9.Theatmosphericrefractionindexinthetroposphericdelaycorrectionmodelisrelatedtofactorssuchastemperat
6、ure,airpressureandhumidity.10.Theglobalpositioningsystemiscomposedofthespacepart,thegroundmonitoringpartandtheuserpart.ThegroundThesurfacemonitoringsectionconsistsofthemaincontrolstation,themonitoringstation,theinjectionstation,andthecommunicationandauxiliarysyst
7、emAnorganization.11.GPSsatellitesignalsarecomposedofcarriers,rangingcodes,andnavigationcables.12.GPSsatellitesaremodulatedbybinaryphasemodulation.13.Thedelayofionosphereisdirectlyproportionaltothetotalelectroncontent(TEC),whichisproportionaltothetotalelectroncont
8、ent(TEC)Thesquareofthesignalfrequencyisinverselyproportional.14.Theobservationofmultiplesatellitescanbecarriedoutinsequenceundersoftwarecontrol,andthetimeofcyc
