SAR衛(wèi)星姿態(tài)測量技術(shù).pdf

1、電子科技大學博士學位論文SAR衛(wèi)星姿態(tài)測量技術(shù)姓名：田增山申請學位級別：博士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：黃順吉2001.11.1屯子科技大學博士論文ABSTRACTTheSAPsatelliteattitudeissuccessfullycarriedoutbymeansofGPSattitudemeasuresystemswhichincludesthreeshortbaselinesorfourGPSantennaeItprovi

2、destherealtimeandhighaccuracyresultsByvectormethodandthedynamicsandkinematicsequation，thethreesatelliteattitudeangle(roll、pitch、yaw)influencesOnDopplerparameterofspacebomeSARmoreseverethanthesatelliteorbitsimposedisintro

3、ducedAsaresulttheSARsatelliteattitudemeasureandcontrolismoreimportantAdirectcomputationmethodandaleastsquaresprocedureforattitudeestimationofSARsatellitearegivenSimultaneitytherelationbetweenattitudeestimationaccuracyand

4、baselineslengthisadvanced，SObetweenattitudeestimationaccuracyandantennaeconfigurationTherelationbetweenattitudeestimationaccuracyandpositionrelativeerroralsoisgottenThedirectcomputationmethodonlyutilizestheinformationofs

5、inglebaseline，buttheleastsquaresproceduremakesuseofeveryantennainformationRelativelytheattitudeestimationbyleastsquaresprocedureisbetterIncourseofachievingtheSARsatelliteattitudeestimation，theke)’forensuringtheattitudees

6、timationaccuracyishowtoimprovetherelativepositionaccuracy—MostofthecommonerrorincludingionosphereerrortroposphereerrortimeerrorarcremovedButthemultipatherrorandnoiseofreceivercan’tberemovedByfoundingthemodelofmultipath，w

7、egettherelationbetweencodedelayandGPSsatelliteelevation，betweencodedelayandmultipathreflectorheight，betweencarriedphasedelayandGPSsatelliteelevation，betweencarriedphasedelayandmultipathreflectorheightAlsowegettherelation

8、betweenmultipathdelayandcarriedphasetrackerrorBymeansofthespacerelativityofmultipathsignal，themethodusingmultiantennaetemovemultipatherrorispresentDetectiontheAmbiguityslipiskeyfactorforpositionorattitudeestimationofhigh

9、dynamicSARsatelliteusingGPSTheambiguityslipsuccessfullycanbedetectedbyionosphereremanelerrorofdualfrequencyTherealtimeandaccuracyofambiguityispremiseofoneepochattitudeastimationandhighestimationaccuracyTheprioriinformati

10、onofambiguityachievedbywidebandcodeisused，thesearchingwindowhasbeendownsizedsignificantlyandthesearchspeedisimprovedBymeansofprioriinformationanditscovarianceandeffectivevalidationcriterion，theambiguitycanberealtimegotte