导航卫星钟差评估与预报研究

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1、分类号：P2210710一20040637谖害犬海硕士学位论文导航卫星钟差评估与预报研究路晓峰导师姓名职称申请学位级别论文提交日期学位授予单位杨志强教授贾小林高级工程师答辩委员会主席贾小林高级工程师学位论文评阅人宋小勇高工杨建华副教授ABSTRACTThemainworksandcontributionsaresummarizedasfollows：1．Thisdissertationmainlystudiesthedevelopmentofnavigationsatellite．thispaperbrieflyintroduces

2、thebackgroundandsignificanceofresearchontheAccuracyEvaluationofNavigationSatelliteClockBias．2．Themathematicandphysicalmodelsontheaccuracyevaluationofsatelliteclockbiasisstudied，andtheirmodelswitherrorsourceisindetailed．3．ThisdissertationmainlystudiesthetheoryoftheAccur

3、acyEvaluationofSatelliteClockBiasUsingtheobersvationdata，andtheaccuracyevaluationisresearched．eg．themethodbetweenpseudo-rangeandrealdistance；betweenpseudo··rangeandSLR；SLRduewaytimesynchronizationbetweenthesatelliteandthegroundstation；duewaytimesynchronizationbetweenth

4、esatelliteandthegroundstation．4．Thecarriersmoothedpseudo—rangeisbrieflydiscussed．AweightingmethodisdevelopedforHatch·-typefilter．BasedonthismodifiedHatch--typefilterandpreciseephemeris，theaccuracyevaluationofsatelliteclockbiasofbroadcastephemerisusingGPSdualfrequencyph

5、ase—smoothedpseudo—rangeisresearched．Bycomparisonandanaysis，thefollowingfactsCallbedrawn．Itimprovestheprecisionofpseudo-rangeusingphasesmoothingpseudo—range，andalsoimprovestheprecisionofsatelliteclockbiaswhentheclockbiasiscalculatedbyusingpseudo-rangesdata，SLRandsmooth

6、edpseudo—rangesdata．5．ThispaperpresentedthemethodforpredicatingthesatelliteclockerrorbytheoptimizationmethodofGraySystemTheory．TheGM(1，1)establishing，modelcalculation．Theoriginalsequence’Stransformationandmodeloptimizationmethodarediscussed．andtheparameteroptimizationm

7、ethodofgraysystemisgiven．CalculatingresultsshowthattheparameteroptimizationmethodCanimprovetheprecisionofthesatelliteclockerrorpredicating．Keywords：GPS；SLR；satelliteclockerror；pseudorange；theSatelliteClockErrorPredicating；graysystem¨论文独创性声明本人声明：本人所呈交的学位论文是在导师的指导下，独立进行研

8、究工作所取得的成果。除论文中已经注明引用的内容外，对论文的研究做出重要贡献的个人和集体，均已在文中以明确方式标明。本论文中不包含任何未加明确注明的其他个人或集体已经公开发表的成果。本声明的法律责任由本人承担。论文作者签名：嵴吼峰。讲夕