39 11 2014 11 GeomaticsandInformationScienceofWuhanUniversity Vol.39No.11 Nov.2014 DOI:10.13203/j.whugis20130265 :1671-8860(2014)11-1347-05 PPS GPS-GLONASS 123 1 23 4 23 1 450001 2 710054 3 710054 4 710054 : 首先对三类不同卫星导航系统时间基准偏差监测途径进行简要介绍 并首次把高精度 PPS(pulseper second) 测量这种方法成功应用到 GPS-GLONASS 时差监测中针对 PPS 测量方案作了较为详尽的论述和 说明 包括硬件配置 数据采集和后处理等内容 在试验中利用两台 GPS 和 GLONASS 双模接收机分别输出 1PPS 的 GPS 和 GLONASS 秒脉冲信号 使用斯坦福大学的 SR620 精密时间间隔计数器进行 PPS 精密测量 从而得到 GPS 和 GLONASS 的系统时间偏差测量值 并通过带有汉宁窗的 FIR 滤波器得到 GPS 和 GLO- NASS 的系统时间偏差估计结果 其平均值为 317.1ns 标准差为 5.01ns :GNSS; 系统时间偏差 ;PPS;FIR 滤波器 ; 时差监测 :P228 :A GNSS(globalnavigationsatelitesystem) PPS GPST-UTC GPS GLONASS Gali- (NTSC) leo BDS 4 ICG 6 [1] GNSS (internationalgnss moni- GNSS GNSS toringandassessmentsystemigmas) GNSS ICG igmas GNSS GNSS 3 [2] GNSS 20 70 GNSS [3] PPS GPS-GLONASS 1 GNSS TWSTFT Galileo GPS GPS Galileo ; [4-6] 1.1 GNSS GNSS [7] ; (two waysatelitetimeandfrequencytrans- GNSS fertwstft) (commonviewcv) :2013-06-22 : (41274016411740064097401041204020); (SKLGIE2013-M-2-1); (2013-2-1) : GNSS E-mail:sqmha@126.com
1348 2014 11 TWSTFT : (GNSS ) GEO ( ) TWSTFT UTC 1ns [8] 1 (PPS) Fig.1 PPS MeasurementMethod ( ) CV : TWSTFTCV (GNSS ) GPS GLONASS 5 GEO 6 2 3~5ns [9] GNSS ( ) GNSS GNSS 1.2 PPS PPS GNSS 2 1 (GPS Fig.2 NASS-1pps) (SR620) GPST GLONASST (1s ) ( NTSC ) GPS/ GLONASS 2 PPS 2.1 PPS 1.3 (PPP) PPP MonitortheTimeOfsetUsingPPP GLONAS) 10 Mhz GPS 5 GLONASS (GPST-1pps GLO- GPS-GLONASS GNSS PPP
39 11 : PPS GPS-GLONASS 1349 [10] : FPGA+ARM ARM I MSA ( PPS ) PPS 4 GPST GLONASST - - GPS-GLONASS 3 PPS Fig.3 DataFlow DiagramofPPS Measurement :A 1 A 2 ;B 1 B 2 ;C 1 C 2 ;D 1 D 2 (SR620) ;E SR620 :1 1PPS Kal- 1PPS man Kalman Topcon (NET-G3A) 0.1ns [11] ;2 FIR ( 10-13 ~10-14 s)rb Rb (Hanning) FIR ; 3 3 PPS ;4 GPS-GLONASS SR620 1PPS GPS GLONASS 2013-06-01:0:0 :0 2013-06-04:24:0 :0 GPS- 345600 ( ) GLONASS 10s 2.2 4 4 1 PPS
1350 2014 11 4 Fig.4 DistributionofMeasurementData 1 2 FIR Tab.1 StatisticalCharacteristicsofRas MeasurementData Tab.2 StatisticalCharacteristiesoftheFilteredData /ns -298.8-332.2-317.1 5.01 /ns -254.8-405.2-316.9 11.45 4d 1)GPS GLONASS ( ) 10ns ; GPS GLO- NASS 2) FIR 40ns 5ns ; FIR 4 (95%) 50ns ( ) 4 (<50ns) GNSS PPS GNSS GLONASS 5 BDT GNSS Fig.5 DistributionofMeasurementData (Hanning) FIR 6 2 6 FIR Fig.6 TimeSeriesAftertheFIRSmoother 3) 1 2 GPS GLONASS FIR GPS [1] YangYuanxi.ProgressContributionand Chalen- gesofcompass/beidousatelitenavigationsystem
39 11 : PPS GPS-GLONASS 1351 [J]. Acta Geodaetica et Cartographica Sinca PosterSessionatEFTF2005 [4] MoudrakA.GPSGalileoTimeOfset:HowItAf- fectspositioningaccuracyandhowtocopewithit [C].ProceedingofION GNSS2004LongBeach CaliforniaUSA [5] VanschoenbeekIBonhoureBBoschetiMetal. GNSSTimeOfset:EfectsonGPS -GalileoInter- operabilityperformance[j].inside GNSS2007 [6] Huang Guanwen.Reserachon AlgorithmsofPre- ciseclock Ofsetand Quality EvaluationofGNSS SateliteClock[M].Xi an:chang an Univesity 136-147) [9] PetitGJiang Z.Stabilityof Geodetic GPS Time Linksand Their Comparison to Two-Way Time Transfer[C].The36th AnnualPrecise Timeand TimeInterval(PTTI)Meeting Washington D C 2012:136-147(.GNSS oflineartie ModelsofLocalClocks[J].IEEE [M]. : 2012: Transactionson UFFC2007:2403-2406 2004 [10]Chen Tao.Researchand Designof GPS Receiver BasebandProcessing[M].Shanghai:ShanghaiJiao tonguniversity2009(.gps [M]. : 2009) [11]ShmaliyYS.OnReal-timeOptimalFIREstimation UsingPrecisePPS MeasureforMonitoringGNSSTimeOffset ZHANG Qinghua 123 SUI Lifen 1 JIA Xiaolin 23 TIAN Liang 4 ZHU Yongxing 23 1 InstituteofSurveyingand MappingInformationEngineeringUniversityZhengzhou450052China 2 StateKeyLaboratoryofGeographicInformationEngineeringXi an710054china 3 Xi anresearchinstituteofsurveyingand MappingXi an710054china 4 Xi ansurveydivisionxi an710054china 201039(1):1-6(. [7] Zhang HuijunLiXiaoXu Longxia.Monitoring [J]. 201039(1):1-6) and Prediction of GNSS System Time Diference [2] Prizl R. GNSS Interoperability: Ofset Between [C].CSNCWuhan2010( Reference Time Scales and Timing Biases [J]..GNSS [C]. Metrologia200845:87-102 2010) [3] SesiaIOrgiazziOTavela P.Determinationof [8] KirchnerD.Two-wayTimeTransferViaCommu- GPS/Galileo Time Ofset (GGTO)[R].Insights nicationsatelites[j].procieee199179(7): from the Galileo System Test Bed V1 Results 983-990 Abstract:ForthethreetypesofGNSSsystemtimeofsetmonitoringapproachweanalyzethebasic principlesandmethodsandmadeacomparisonoftheiraccuracyreliabilityandimplementationand findingthatthepps-basedmethodismoresuitablefortimeofsetmonitoring.wepresentadetailed discussionanddescriptionincludinghardwareconfigurationdatacolectionandpostprocessingcon- tentforthepps-basedmethod.inanexperimentweusebothgpsandglonassdual-modereceiv- erstogeneratethe1ppsofgpsandglonasssecondpulsesignalsandusedthestanfordsr620 timeintervalcounterforppsprecisionmeasurement.wetherebyobtainedgpsandglonasssys- temtimeofsetmeasurementvaluesandadoptedafirfilterwithahanningwindowtogetthegps andglonasssystemtimeofsetaverage317.1nswithastandarddeviationof5.01ns. Keywords:GNSS;systemtimeofset;PPS;FIRfilter;timeofsetmonitoring Firstauthor:ZHANG QinghuaPhDcandidatespecializesinthetheoriesandmethodsofGNSSnavigation.E-mail:sqmha@126.com Foundationsupport:TheNationalNaturalScienceFoundationofChinaNos.41274016411740064097401041204020;theOpenRe- searchfundprogram ofkeylaboratoryofgeographicinformationengineeringno.sklgie2013-m-2-1;theieu PhDInnovation FundNo.2013-2-1.