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| 1 | Positional accuracy measurement and error modeling for mobile tracking显示文摘 | Sharp I YU Kegen Sathyan T | 2012 | IEEE Transactions on Mobile Computing2012，11，6： | 1 |
| 2 | Anchor global position accuracy enhancement based on data fusion显示文摘 | Kegen Y Guo Y J | 2009 | IEEE Transactions on Vehicular Technology2009，57，3： | 1 |
| 3 | Improved positioning algorithms for non-line- of-sight environments 显示文摘 | KEGEN Y GUO Y | 2008 | IEEE Transactions on Vehicular Technol- ogy2008，57，4： | 1 |
| 4 | UWB Location and tracking for wireless embedded networks显示文摘 | Kegen Yu Jean-philippe Montillet Alberto Rabbachin | 2006 | Signal Processing2006，86，9： | 1 |
| 5 | Statistical NLOS Identification Based on AOA,TOA and Signal Strength显示文摘 | Yu Kegen Guo Yingjie | 2009 | IEEE Transactions on Vehicular Technology2009，58，1： | 1 |
| 6 | Positioning for NLOS Propagation: Algorithm Derivations and Cramer-Rao Bounds 显示文摘 | Honglei Miao Kegen Yu Markku J Juntti | 2007 | IEEE Transactions on vehicular technology2007，56，5： | 1 |
| 7 | GDOP Analysis for Positioning System De- sign显示文摘 | Sharp I Kegen Y | 2009 | IEEE Transactions on Vehicular Technology2009，58，7： | 1 |
| 8 | Improved Positioning Algorithms for Nonline- of-sight Environments显示文摘 | Kegen Y Jay Y G | 2008 | IEEE Transactions on Vehicular Technology2008，57，4： | 1 |
| 9 | Statistical NLOS Identification Based on AOA, TOA, and Signal Strength显示文摘 | Yu Kegen Guo Y J | 2009 | IEEE Transactions on Vehicular Technology2009，58，1： | 1 |
| 10 | GDOP analysis for positioning system design显示文摘 | Sharp Ian Yu Kegen Guo Y Jay | 2009 | IEEE Transactions on Vehicular Technology2009，58，7： | 1 |
| 11 | GDOP analysis for positioning system design显示文摘 | SHARP L KEGEN Y GUO Y J | 2009 | IEEE Transactions on Vehicular Technology2009，58，7： | 1 |
| 12 | Enhanced least-squares positioning algorithm for indoor positioning 显示文摘 | Sharp I Kegen Yu | 2013 | IEEE Transac- tions on Mobile Computing2013，12，8： | 1 |
| 13 | Improved positioning algorithms for nonline-of-sight environments显示文摘 | KEGEN Y GUO Y J | | 0，，04： | 1 |
| 14 | Improved positioning algorithm for NLOS environment显示文摘 | Yu Kegen and Guo Y J | 2008 | IEEE Transactions on Vehic- ular Technology2008，57，4： | 1 |
| 15 | Anchor Global Position Accuracy Enhancement Based on Data Fusion显示文摘 | KEGEN Y GUO Y J | 2009 | IEEE Trans on Vehicular Echnology2009，57，3： | 1 |
| 16 | GDOP Analysis for Positioning System Design 显示文摘 | Sharp I Kegen Y | 2009 | IEEE Transactions on Vehicular Technology2009，58，7： | 1 |
| 17 | Performance of decorrelating receivers in multipath rician fading channels显示文摘 | Kegen Yu lan Oppermann et at | 2006 | IEEE Transactions on Wireless Communications2006，5，8： | 1 |
| 18 | Geometry and Motion-Based Positioning Algorithms for Mobile Tracking in NLOS Environments显示文摘 | Kegen Yu Dutkiewicz E | | 0，，11： | 1 |
| 19 | GDOP Analysis for Positioning System Design显示文摘 | SHARP I KEGEN Y GUO Y J | | 0，，07： | 1 |
| 20 | Evaluation of BDS and GPS RAIM availability based on data collected in June 2020显示文摘The satellite pseudo-range fault detection with the Receiver Autonomous Integrity Monitoring(RAIM)method is affected by several satellite observations and the geometric distribution of satellites.The poor geometry distribution of satellites will conceal the positioning errorcaused by the satellite pseudo-range fault,resulting in unreliable detection results.Therefore,the availability evaluation must be made before RAIM to ensure that the fault detection performance will not be affected.On June 23,2020,China successfully launched the 30 th(last)navigation satellite of BeiDou’s third-generation navigation satellite system(BDS-3),which is also the 55 th BeiDou navigation satellite.Combining all the available satellites of BDS-1,BDS-2 and BDS-3,the positioning performance of BDS can be greatly improved.In order to evaluate the RAIM availability of BeiDou Navigation Satellite System(BDS)and Global Positioning System(GPS)in China,this paper first deduces the mathematical models and their characteristics of the three RAIM availability evaluation methods.Then,the study area(N10°-70°,E60°-150°)is divided into 4536 grid points at intervals of 1°×1°in latitude and longitude,and the elevations of these grid points are taken from the global terrain data file.The Horizontal Protection Level(HPL)values of these grid points are calculated during 8-15 June 2020 using BDS and GPS ephemeris data.The RAIM availability differences between the two systems are compared and analysed.The analysis shows the Horizontal Protection Level method(HPLM)based on single-satellite pseudo-range fault is the most practical and convenient.During the 8-day observation period,the HPL values of BDS are significantly smaller than those of GPS in terms of geographic location and observation time,and the variation of HPL time series of BDS is also smaller than that of GPS,which indicates that the RAIM availability of GPS in China is not as good as that of BDS.Most importantly,in the four flight stages of the aircraft’s Oceanic/Continental lowdensity En-route,Continental En-route,Terminal En-route and Non-precision approach(NPA),BDS can completely satisfy its RAIM availability requirement,while GPS can only meet the availability requirement of the En-route(Oceanic/Continental low density)phase,and the availability of the other three phases can at least reach 99.714%. | Xiaping Ma Kegen Yu Ershen Wang Xiaoxing He Tieding Lu Qinzhen Li | 2021 | Geodesy and Geodynamics2021，12，3： | 0 |
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