基于iGMAS的北斗新一代衛(wèi)星精密定軌初步結(jié)果與分析

1、基于iGMAS觀測網(wǎng)絡(luò)數(shù)據(jù)的北斗新一代衛(wèi)星（BeiDou-3）精密定軌初步結(jié)果與分析潭冰峰，袁運斌第二屆大地第二屆大地測量與地球物理學(xué)學(xué)量與地球物理學(xué)學(xué)術(shù)大會大會-IAG-G02江江蘇 南京南京中國科學(xué)院測量與地球物理研究所2016年9月24日Institute of Geodesy and Geophysics (IGG) Slide 2報告目錄報告目錄p研究背景研究背景pBeiDou-3衛(wèi)星精密定軌方法與流程衛(wèi)星精密定軌方法與流程pBeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示p總結(jié)與展望總結(jié)與展望Institute of Geodesy and Geophysics (

2、IGG) Slide 3研究背景研究背景(1/5)北斗衛(wèi)星導(dǎo)航系統(tǒng)北斗衛(wèi)星導(dǎo)航系統(tǒng)-BeiDou Navigation Satellite System (BDS)BDS系統(tǒng)建設(shè)系統(tǒng)建設(shè)區(qū)域系統(tǒng) 全球系統(tǒng)BDS區(qū)域系統(tǒng)情況區(qū)域系統(tǒng)情況5 GEO + 5 IGSO + 4 MEO；2012年12月27日起正式向亞太區(qū)域提供定位、導(dǎo)航、授時服務(wù)；BDS全球系統(tǒng)情況全球系統(tǒng)情況2015年3月30日，第一顆新一代北斗全球?qū)Ш叫l(wèi)星（BeiDou-3）- BeiDou I1S-C31發(fā)射成功；標志著北斗衛(wèi)星導(dǎo)航系統(tǒng)正式從區(qū)域走向全球化建設(shè)；2015年2月10日起，國際海事組織（IMO）正式認可BDS并將其

3、納入全球無線電導(dǎo)航系統(tǒng)。目前在軌運行BeiDou-3 Satellites： C31, C32, C33, C34, C35；Institute of Geodesy and Geophysics (IGG) Slide 4研究背景研究背景(2/5)北斗衛(wèi)星導(dǎo)航系統(tǒng)星座現(xiàn)狀（北斗衛(wèi)星導(dǎo)航系統(tǒng)星座現(xiàn)狀（2016-9）Beidou-2SatellitePRNSVNTypeNotesLaunch DateG01C01C003GEO140.0 EJan 17, 2010G02C02C002GEONot in operationApr 15, 2009G03C03C004GEO84.0 EJan 2,

4、2010G04C04C006GEO160.0 ENov 1, 2011G05C05C011GEO58.75 EFeb 25, 2012G06C02C016GEO110.5 EOct 25, 2012G07C17C017GEOIn orbit testJun 12, 2016I01C06C005IGSO122 EAug 1, 2010I02C07C007IGSO119 EDec 18, 2010I03C08C008IGSO120 EApr 10, 2011I04C09C009IGSO96.5 EJul 27, 2011I05C10C010IGSO92.5 EDec 2, 2011I06C15C0

5、17IGSO95 EMar 29, 2016M01C30C001MEONot in operationApr 4, 2007M03C11C012MEO Apr 30, 2012M04C12C013MEO Apr 30, 2012M05C13C014MEONot in operationSep 18, 2012M06C14C015MEO Sep 18, 2012Beidou-3SatellitePRNSVNTypeNotesLaunch DateI1-SC31C101IGSO Mar 30, 2015M1-SC33C102MEO Jul 25, 2015M2-SC34C103MEO Jul 25

6、, 2015I2-SC32C104IGSO Sep 29, 2015M3-SC35C105MEOIn orbit testFeb 1, 2016* /web/eoportal/satellite-missions/c-missions/cnssInstitute of Geodesy and Geophysics (IGG) Slide 5研究背景研究背景(3/5)BeiDou-3 Satellites新特性新特性保留保留BeiDou-2 信號傳輸體系信號傳輸體系三個頻點：1561.098 MHz (B1), 1207.140 MHz

7、(B2) and 1268.520 MHz (B3)；新的信號體制新的信號體制B1變更為1575.42 MHz，與GPS L1及Galileo E1頻率一致；B1信號調(diào)制方式從QPSK變?yōu)镸BOC；B2信號調(diào)制方式采用新的四種調(diào)制方式；地面跟蹤站地面跟蹤站iGMAS：目前有9個跟蹤站能接收BeiDou-3 Satellites 舊的B1及B3頻點數(shù)據(jù)；MGEX： 目前有4個跟蹤站能接收BeiDou-3 C31 B1頻點數(shù)據(jù)；B2a及B2b兩種備選頻率；兩種B3c備選頻率；Institute of Geodesy and Geophysics (IGG) Slide 6研究背景研究背景(4/5)

8、iGMAS BDS跟蹤站跟蹤站-9個個Institute of Geodesy and Geophysics (IGG) Slide 7研究背景研究背景(4/5)iGMAS BDS跟蹤站跟蹤站-9個個Station Abb.LocationCountryReceiverAntennaBJF1BeijingChinaCETC-54 GMR-4011LEIAR25.R4 LEITBRCHBraunschweigGermanyCETC-54 GMR-4011LEIAR25.R4 LEITCLGYCalgaryCanadaCETC-54 GMR-4011LEIAR25.R4 LEITGUA1Urumq

9、iChinaGNSS_GGRRINT-8CH CETDLHA1LhasaChinaCETC-54 GMR-4011NOV750.R4 NOVSTAHTTahitiFrance GNSS_GGRRINT-8CH CETDWUH1WuhanChinaCETC-54 GMR-4011LEIAR25.R4 LEITXIA1XianChinaGNSS_GGRRINT-8CH CETDXHONAntarcticaUnited NationsCETC-54 GMR-4011LEIAR25.R4 LEITInstitute of Geodesy and Geophysics (IGG) Slide 8研究背景

10、研究背景(5/5)MGEX BDS跟蹤站跟蹤站-52個，其中有個，其中有4個能接收個能接收C31 B1頻點數(shù)據(jù)頻點數(shù)據(jù)Institute of Geodesy and Geophysics (IGG) Slide 9BeiDou-3衛(wèi)星精密定軌方法與流程衛(wèi)星精密定軌方法與流程(1/2)BeiDou-3衛(wèi)星精密定軌衛(wèi)星精密定軌-兩步法間接聯(lián)合兩步法間接聯(lián)合GPS單系統(tǒng)精密定軌單系統(tǒng)精密定軌 BeiDou-3 Satellites地面跟蹤站目前數(shù)量和分布均有限； 將所選取的iGMAS 9個站及MGEX 52個站用于GPS單系統(tǒng)精密定軌；BDS單系統(tǒng)精密定軌單系統(tǒng)精密定軌 將得到的測站坐標等參數(shù)引入

11、，在北斗單系統(tǒng)定軌中固定或作為先驗值； 將得到的測站坐標、測站天頂對流層延遲參數(shù)、地球自轉(zhuǎn)參數(shù)輸出。 觀測數(shù)據(jù)：B1、B3消電離層雙差相位及偽距數(shù)據(jù)；定軌弧段3天； 動力學(xué)參數(shù)：選用五參數(shù)ECOM光壓模型以及偽隨機脈沖參數(shù)。Institute of Geodesy and Geophysics (IGG) Slide 10BeiDou-3衛(wèi)星精密定軌方法與流程衛(wèi)星精密定軌方法與流程(2/2)BeiDou-3衛(wèi)星精密定軌策略衛(wèi)星精密定軌策略StrategyDescribeObservationsDouble-differenced ionosphere-free code and phase c

12、ombination of B1 and B3 in deployment phase 1Elevation angle cut-off7Sampling rate30 sData span3 daysStation coordinates and ERPsFixed using estimates from the GPS daily POD processWeighting4 mm for phase observations, 2 m for code observations and elevation-dependent weightingSatellite antenna PCO

13、and PCVPCO values are given by the Operation Control Department (apply for authorization), no PCV appliedSLR retro-reflector offsetsGiven by the Operation Control Department (apply for authorization)Attitude modelYaw-steering attitude modeGround antenna PCO and PCVNot appliedTroposphereDry and wet G

14、MF mapping functions; ZTDs estimated for each station at intervals of 2 hours; GPS daily ZTDs used as a priori valuesPrecession and nutationIAU 2010 precession and IAU 2010 nutation modelGeopotentialEGM2008 12*12Solid Earth tides, ocean tides and solid Earth pole tidesIERS Conventions 2010N bodyJPL

15、DE405 ephemerisOrbital parameters6 orbit elements and 5 ECOM SRP parameters were estimated:constants in the D, Y and X directions; periodic terms in the X directionPseudo-stochastic orbit parametersEvery 12 hours; constrained to 1E-6 m/sec in the radial direction, 1E-5 m/sec in the along-track direc

16、tion, and 1E-8 m/sec in the cross-track directionAmbiguityReal constant value for each ambiguity arcInstitute of Geodesy and Geophysics (IGG) Slide 11BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (1/13)定軌數(shù)據(jù)選取定軌數(shù)據(jù)選取 iGMAS跟蹤站網(wǎng) 9個跟蹤站2016.07.16-08.14觀測數(shù)據(jù)；BeiDou-3軌道檢核軌道檢核 內(nèi)符合（重疊弧段） 外符合（SLR檢核） MGEX跟蹤站網(wǎng) 52個跟蹤站2016.07.1

17、6-08.14觀測數(shù)據(jù)；BeiDou-2Institute of Geodesy and Geophysics (IGG) Slide 12BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (2/13)內(nèi)符合內(nèi)符合-重疊弧段互差重疊弧段互差I(lǐng)nstitute of Geodesy and Geophysics (IGG) Slide 13BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (3/13)外符合外符合-SLR檢核檢核本次處理期間，C31, C32, C33, C34, C01, C08, C10及C11衛(wèi)星分別有12, 29, 45，10，114，36

18、，125及104個SLR觀測值normal points (NPs)，這些觀測值來自ILRS觀測網(wǎng)絡(luò)的Yarragadee, Monument, Papeete, Changchun, Shanghai, Mount Stro, Herstmonce and Matera測站 (見下圖).Institute of Geodesy and Geophysics (IGG) Slide 14BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (4/13)內(nèi)符合內(nèi)符合-重疊弧段互差結(jié)果重疊弧段互差結(jié)果-BeiDou 3C31C32C33C34Institute of Geodesy a

19、nd Geophysics (IGG) Slide 15BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (5/13)內(nèi)符合內(nèi)符合-24h重疊弧段互差結(jié)果重疊弧段互差結(jié)果-BeiDou 3PRN of BeiDou SatellitesRadial (cm)Along(cm)Cross (cm)C3112.5124.9523.82C3211.8825.8124.32C3340.7558.6751.82C3441.1659.8859.11Institute of Geodesy and Geophysics (IGG) Slide 16BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星

20、精密定軌初步結(jié)果展示 (6/13)外符合外符合-SLR結(jié)果結(jié)果-BeiDou 3C31C32C33C34Institute of Geodesy and Geophysics (IGG) Slide 17BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (7/13)外符合外符合-SLR結(jié)果結(jié)果-BeiDou 3PRN of BeiDou SatellitesMean (cm)RMS (cm)C31-3.8211.25C32-3.5111.28C3315.6438.61C3415.4440.26Institute of Geodesy and Geophysics (IGG) S

21、lide 18BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (10/13)內(nèi)符合內(nèi)符合-重疊弧段重疊弧段-BeiDou 2123456789101511121400.7PRN of BeiDou 2 SatellitesRMS/m RadialAlongCross1DInstitute of Geodesy and Geophysics (IGG) Slide 19BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (11/13)內(nèi)符合內(nèi)符合-重疊弧段重疊弧段-BeiDou 2PRN of BeiDou 2 Satellit

22、esRadial (cm)Along(cm)Cross (cm)C010.27390.58720.3649C020.25720.38790.2909C030.27320.30870.3678C040.41550.69190.4712C050.33580.41250.348C060.12350.20050.1077C070.11460.16120.1057C080.08490.2070.1503C090.11120.16670.1317C100.11230.20650.1465C150.09260.15630.122C110.05690.12450.0637C120.04460.13460.0731C140.05220.14410.1219Institute of Geodesy and Geophysics (IGG) Slide 20BeiDou-3衛(wèi)星精密定軌初步結(jié)果展示衛(wèi)星精密定軌初步結(jié)果展示 (12/13)C01C08C10C11外符合外符合-SLR結(jié)果結(jié)果-BeiDou 2Institute of Geodesy and Geoph