GPS精密单点定位的PPT

【实例简介】
GPS精密单点定位的介绍，包括后期精密定位与实时精密单点定位
Limitations of conventional ppp Accuracy/Precision Depend on Quality of Precise Satellite Orbit/Clock Satellite Clock Interpolation Error/Day-Boundary Problem Solution Drift by float ambiguity and Imperfect Correction Real-time processing Lack of Real-time Precise Satellite Clock ° Long Convergence Time Due to Float ambiguity Estimation Inaccurate with Single-Freq receiver Poor ionospheric Correction Mode KGPS VS Kinematic-PPP Displacement by Iwate- Miyagi EQ 2008/6/1322:00-6/140:30,GS|0193 Minase KGPS(BL=219 km) Kinematic-PPP c: YgpslogY200613Y01931650p09 stinn e 主 Reiver Pveiliuni90193.2008001323.0.00-200301400.3000 -5(m) REF: AvEEN 20cm 30:1500 by rtKPost 2.2.1 IGS Final Orbit/30-s Clock △:Day- Boundary by gt0.6. 4 IGS Orbit/Clock IGS Prduct Table Fina Rapid Ultra-Rapid (IGU) Broadcast (IGS (IGR) Observed Predicted Orbit 2.5cm 2.5cm Ncm rcm M100cr Accuracy 150ps Clock /5ps RMS"75pS RMS N3ns RMs 5ns RMS RMS C20ps STD25ps STD M15ns std 2.5nS STD M5Ops STD 17-41 Latency 12-18day hours 3-9 hours realtime realtime Updates every at17 UTC at03,09,at03,09, Thursday daily 15, 21 UTC 15, 21 UTC Orbit 15min 15min 15min 15min daily Sample Interva Sat: 30s Clock 5min 15mi Stn: 5min 15min daily (2009/8,http://igscb.jplnasagov/) Day-Boundary Problem Static-PPP Residuals 2009/2/1-2/4, PRN19-TSKB, IGS Final Orbit/Clock FoitEt Res: hal GGPSLS-SEB: 20090201 2100: 00-20090202C259: 10 Postf t REsihuEl GP]9Ts:2192022汇D20002030253 2/1 2/2 2/22/3 2cm PULCI Ilub <PS]2.J. 2309,0]/042L 0 T MEAN:.OD11 teAr-0002HFMS: daoism 2/32/4 2/42/5 Anomaly of IGS 30-s Clock Static-PPP Residuals 2008/3/30535-9:30,PRN26-TSKB IGS Final Orbit/30-s Clock 37儿(E)焦(E)表示()揉A()y-儿)不图)A儿出上 ata plot satel Pos-t Residuals GP$26sB:2003030000000200833022:59:30 }}}}4%Rr:0131m Large bias o ali. beween 300-s. . o1l-i-Clock and Others .02 -06:-÷…-:-2 2cm -.} 、1LL-LLL⊥-LLL-L,⊥-LL-J~LL 3306:30 3307:00 3303:00 IGS AC Orbit/Clock Final Rapid Ultra-Rapid AC Orbit Clock Orbit Clock Orbit Clock CODE 15min 5s/30s 15min 5min 15min 15min ESOC 15min 5min 15min 5min 15min 15min GFZ 15min 5min 15min 5min 15min15min 」PL 15m 5min 15min 5min NOAA 15min 15min15min 15min NRCan 15min 30s 15min 5min 15min 15min SIO 15mi 15min 15min 15min USNO 15min 15min MIT 15min 30 Os GRG 15min 5min USN 15min 5 min GOU 15min 15min (2009/8,http://igscbjplnasagov/) 10 Interpolation Error of Clock Satellite Clock Stability 5s30s300s 10 Block iiia cs e Block i iia rb Block iir rb <4X 10 -12 3x 1012 <2X 13 10 10 10 III Averaging 'Timet(sec) (2004/12) 11 CODE 5-s Clock S Schaer, [IGSMAIL-5771] Model changes made at CoDE, 14 May 2008 H Bock et al., High-rate GPS clock correction from CODE: support of 1Hz applications, J Geod, 2009 Hz Kinematic-PPP 2008/4/27 6: 00-9: 00 IGS USUD with CODE Orbit/CODE 5s Clock with IGS Final Orbit/30s Clock Receiver p k5(20sf5 四西网[ Reserver Position: d: stestdk'is (sth) yL(F)实E)表示()泽入门少—儿)功>F()~( Dale paul 2yLE!梅美E)表小Y)择人少一儿工)个>Fw)^儿() Data plot Receive Pysiliut usUD.2008042700.00.00-2008042708.9.59 Receiver position USUD:208042705:00:0-2008042708:59:59 :::ngMA0m:08m }}}:AnM:00m3:0305m !!1F:AanM.00300142m xocm RMSE: E: 2.78cm N: 1. 18cm U: 2.26cm RMSE: E: 3.05cm N: 1. 42cm U: 2.75cm 12 Real-Time PPp 13 Real-time ppp ° Strategy1: Orbit/Clock: Estimated in Real-Time Need World-Wide Station Network(>50 Stations) Complicated Processing Process CPU Load restriction Strateg By 2 Orbit: fixed to igu-Predicted Clock: estimated in real-time Regional Station Network Simple processing process 14 Star FireTM Features Commercial Service by navcom Broadcast Real-Time Orbit/Clock via Satellite(Inmarsat JPL RTG (Real-time GIPSY) Processing Engine(GDGPS World wide station Network(72 Stn in 2006) ionosphere: L1/ L2 Dual-Freg troposphere: WAAS Mode Qc by real-Time Monitor for Satellite anomaly Accuracy/Precision Horizontal position rms:<10 cm 15 Improvement of IGU Orbit IGS Ultra Rapid Orbits(RT predictions compared to IGs Rapi o raw smoothed IGU combo changes 800 USU improves 70o PRN29(IIA) ends ooeb o p GOU improves ,308 20o D 100 11001125115011751200122512501275130013251350137514001425145014751500 (Ray et al., Status of IGS Ultra-Rapid Products for Real-Time Applications, 2008 AGU Fall Meeting) 16 IGU Orbit Clock Est PPP RTnet DevelopedbygpsSolutions(http://www.gps-solutions.com) CDAAC Near Real-Time POd of LEo Satellites(COSMIC . Bernese 5.0 EUREF NRTK Service Use rtnet Provide real-Time Orbit/Clock via Internet(NTRIP ·」MA Near real-Time geonet pwv for nwm 17 PPP-AR Convergence Time of PPP Kinematic Solution 2009/7/10:00-2:00,GS|2110 KGPS with AR(BL=133km Kinematic-PPP =le EdIt lew Hel 7儿F)集E)获示()揉入(1 W/\/H) Data Plot 1图12--+州f。 [-w(n) RL: iver Puyi.jun921102009/07/010.000-2009/07/101.5930 AVE=0. 0050 5TD=.0 1Cr F Ns=0.2.Im REr: A cross MEAN oboon RNa o 1+com IDtr AYF=-.02m D=n.021m ENS=0. 0?1m 50cm L13 J1:4U 1]200307/1(00007)0200GPsT:N=21b=13Q=1:24929%)217 by rtKPost 2.2.1 by gt.6.4 IGS Final Orbit/CODE 5-s Clock 19 PPP-AR with ar for ppp Improve Convergence Time Improve Accuracy of Static Solution(EW, UD) I mprove Stability of kinematic Solution Difficulties of ar for ppp Unknown satellite Initial phase biases Effect of Precise Orbit/Clock Error Effect of ionospheric delay Code/ Phase Bias Instability Multipath effect at reference station Network 20 【实例截图】
【核心代码】