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    ˫GNSSھ̬Զλľȷ

    2014-10-23 10:51:35Դ: ˮˮ֡ߣ

    ժҪȷGNSSϵͳ̬ԶλӰأʵȽϷ˵˫GNSSϵͳ̬Զλȣ֤ʵ˫GNSSϵͳԽԡ

    ؼʣزѧ̬ԶλͳƷGNSS

    1

    ȫǶλϵͳ(GNSS)ָǵϵͳṩλáٶȼʱϢԸĿжλܡҵΪӦGNSSλѾGNSSչΪ湤һֲɻȱҪߣĽ˲ɹľȡٶȺ;Ч档GNSS봫ͳĿƲƽƲȣԵĽչͳ辫ܲķø߾ȵIJǺ;γǣóIJйڵθӡΧԼһЩԭ򣬸һѡŸ߾GNSSλķչGNSS߾ȵĿѾȡ˳̬ԶλĿǰߵGNSS[3]Ҳ򵥡ҵЧҵݴ죬ѱ㷺ڲȼ߿ȸֲС

    ѽɺͶеȫǵλϵͳҪGPSϵͳͶ˹GLONASSϵͳĿǰгGNSSջɼݽGPS/GLONASSźţGPS/GLONASSɶλϵͳӽڵѡĿṩ˸ĸǣӵĿʹǼηֲãܸõظڵεɽͻƵľŨѵķGNSSԶλӰأʵȽѵ̬ԶλеϵͳGPS˫ϵͳGPS/GLONASSȣ˵˫ϵͳѵ̬ԶλƲеԽԡ

    2 GNSSԶλӰ

    2.1 PDOPֵ

    GNSSIJҪҪûļλ(ÿռλþPDOPPosition Dilution of Precisionʾ)ͨüξGDOP(Geometric Dilution of Precision)ռλþPDOPʱTDOP(ջӲTime Dilution of Precision)ۺӰľ[4]

    GNSSԶλ뾫(DOP)ĴСȡо۲վ۲ɵԽʱڿռķֲΧҲԽʱGDOP ֵԽС۲ľҲԽá

    2.2 ߾

    ̬ͨ۲ԻGNSSջ֮ĻGNSSʾ˸վһλùϵվվ߽GNSS̬ԶλݺеҪڣGNSSƽĻݣûֱӰ쵽GNSS̬Զλijɹ;ȡ߽һݴԶɣ߽Ḷ́ʵһƽḶ́ƽʱõĹ۲Ҫ˫۲ֵ߽ʱȽгʼƽδ֪ͻĸ⣻Ȼδ̶֪Ϊȷ˵δ֪Ϊ֪IJվΪδ֪ٴνƽ㣬Ĺ̶⣬[5]

    2.3 ƽ

    GPSGPS߽ľGPS㾫ȵĻڴ˻GPSƽҲͬҪGPSGPSͬ۲ֱӽҲǽGPSƽȡյλĹ۲ֵGPSƽǴӽĻѡ߹ɱպͼΣάӦķ-ЭΪ۲ϢGPSСԼƽԼƽGPSWGS-84ϵµάƽꡣGPSƽ˿Խ⣬Էֺ޳GPS۲ֵ͵۲еĴֲڸ͵ìܣ۲ɹľȡ

    3 ʵͳ

    ʵλҰˮΪɽϿȵشɽƶӹУ߲ϴ󣬵һGPSɼĿ١ĴҵTrimble Business Centerʱα༭”ѡȡһ߱Ƚϵ˫ϵͳͼ1ʵѡȡ2012ҰˮDƲijһ۲ݡ6̨Trimble GNSS R8ջͬӾ̬Զλ۲⣬һй۲7ʱΣ۲30㣬γ214߱պϻҵ۲ⰴGB/T 18314-2009ȫλϵͳ(GPS)DҪִСҵݴTrimble Business Centerִ֧GPS (L1L2L2CL5)GLONASS (L1, L2)

    ͼ1 B28ߵ˫Ǹͼ

    ԸЧߺƽͼʽֱ۵ıȽӰGNSSԶλȵء

    3.1 PDOPֵ

    PDOPǺǵϵͳλȷ̶ȵһҪָꡣر˫ϵͳӦУGLONASSPDOPĸƳ̶ȾϵͳܷЧ߶λȡͼ2Ϊʵ߹۲ʱPDOPֵȽϡ

     

    ͼ2 ˫Ǹ۲ʱPDOPֵȽͼ

    Уϵͳ۲ʱPDOPֵΪ19.884СΪ2.387˫ϵͳ۲ʱPDOPֵΪ5.291СΪ1.919ɼGLONASS PDOPֵԼСȫPDOPֵ仯ȶ

    3.2

    ߽󣬿ͨRATIO(ģȼָ)RMSλȨӺɾʼͬ첽۲⻷պϲ⼸ָ߽ʵԻˮƽȼպϻ侫ȡ

    3.2.1 ˮƽ

    ʵѡȡȫ۲105ͳƣ˫ǻˮƽȱȽͼ

    ͼ3 ˫Ǹ۲ʱˮƽȱȽͼ

    УǻˮƽΪ0.762mƽΪ0.037m˫ˮƽΪ0.023mƽΪ0.006mͼ˫ϵͳó߾ȸҽΪȶ

    3.2.2 պϻ

    GPS պϲΪͬպϲ첽պϲͬպϲޣ˵ͬĻһ⣬ĻҪɾȥҪͱ¹۲⡣첽պϲ޲Ҫʱͬպϲһ޲Ҫ첽պϲޣ˵첽Ļһϸ񣬿ͨ첽ظ߲ϸĻߡʵպϻ徫ͳƼ±1ѡȡDZպϻ0.100m

    1 ˫DZպϻͳƱ

    ָ

    ˫

    214

    214

    ˮƽȣm

    0.001

    0.000

    ˮƽȣm

    0.638

    0.071

    ƽˮƽȣm

    0.048

    0.012

    ׼ˮƽȣm

    0.125

    0.017

    պϻӦ˫DZպϻȽϣպϲͼ4

    ͼ4 ǾȽϲıպϻӦ˫DZպϻȽͼ

    3.3 άԼƽ

    ʵ÷ӳڷϾȵάԼƽȽϵ˫Ǿȣѡȡȫеĵλˮƽͳƣ˫ϵͳƽˮƽͼ5

    ͼ5 ˫άԼƽλˮƽȽͼ

    УϵͳάԼƽλˮƽΪ0.083mƽΪ0.020m˫ϵͳΪ0.012mƽΪ0.007 m

    ͼȽϷ֣˫ϵͳڵϵͳҾȽΪȡ

    4

    ĿǰҵиȼƲҪGNSS̬Զλģʽɣ˫ϵͳھ̬ԶλоӦԽ١ͨGNSS̬ԶλӰأʵͳƷ˫GNSSԶλȣ֤ʵ˫GNSSѵ̬ԶλȵϵͳиߵľȺȶԣнϺõʵüֵ

    ο

    [1] Ż־ǿ.GPSԭӦ[M].人ѧ.2006

    [2] Ԫ÷.Ʋѧ[M].人ѧ.2002

    [3] .GPS ߾ȷķо[D].Ӻѧ˶ʿ. 2005.06

    [4] . GPSռλþģ[J].ȫλϵͳ. 2006.02

    [5]ź.GPSߴӦעļ[J].̽װ.2003.12

    ߼飺У1983ʦҪGPSݴӵ⹤ַ·4ţʱࣺ400014,023-89052908.

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