Analysis of SBAS Ephemeris Correction and UDRE Generation Algorithm

JIN Biao; WEI Wei; CHEN Shanshan; LI Dongjun

doi:10.13203/j.whugis20190033

Volume 46 Issue 1

Jan. 2021

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Geomatics and Information Science of Wuhan University > 2021 > 46(1): 111-117. > DOI: 10.13203/j.whugis20190033

JIN Biao, WEI Wei, CHEN Shanshan, LI Dongjun. Analysis of SBAS Ephemeris Correction and UDRE Generation Algorithm[J]. Geomatics and Information Science of Wuhan University, 2021, 46(1): 111-117. DOI: 10.13203/j.whugis20190033

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Analysis of SBAS Ephemeris Correction and UDRE Generation Algorithm

1.
Space Start Technology Co., LTD, Beijing 100094, China
2.
Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
3.
China Satellite Navigation Office, Beijing 100000, China

Funds:

The National Natural Science Foundation of China 41974041

Equipment Preresearch Foundation of China 61405180103

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Author Bio:
JIN Biao, PhD candidate, senior engineer, specializes in the integrity of satellite navigation and satellite orbit determination. E-mail: jinbiao366788@126.com
Received Date: January 02, 2020
Published Date: January 04, 2021

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Abstract

Abstract

Satellite based augmentation system (SBAS) improves the accuracy and integrity of user positioning by broadcasting ephemeris corrections and associated integrity parameters through geostationary earth orbit satellites in real time. Minimum variance estimation method is proposed to derive the GPS ephemeris corrections and a Chi-square test is performed on the residual errors of corrected ephemeris to meet the integrity requirement. Satellite user differential range error (UDRE) and scaling matrix contained in message type 28 (MT28) are calculated based on the covariance information with the assumption that one of the reference stations failed. Actual data collected by 27 stations spread over China are applied to verify the proposed algorithm. International GNSS Service precise clock and orbit products are firstly taken as reference to assess the accuracy of ephemeris corrections. Results indicate that an accuracy of 0.1 m for clock and 0.4 m for orbit corrections can be obtained. Then, corrections of GPS broadcast ephemeris are estimated, the integrity parameters including UDRE and MT28 are generated. Chi-square test results of the ephemeris remaining errors show no exceeding of the threshold which reveals the integrity of corrections. A clear dependence of UDRE on satellite elevation is presented. On board clock failure and satellite maneuvering were simulated to evaluate the performance of the proposed algorithm. Measurement errors introduced by satellite abnormity can be effectively detected and compensated by the algorithm. With ionospheric delay corrected by Klobuchar model and ephemeris corrections generated in this contribution, SBAS positioning results achieve the accuracies of 0.7 m in horizontal direction and 1.0 m in vertical direction, which show an improvement of 30% in horizontal direction and 40% in vertical direction compared with the GPS single point positioning results.
- satellite based augmentation system (SBAS),
- ephemeris correction,
- integrity,
- user differential range error(UDRE)

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[1]	Burns J.Wide Area Augmentation System (WAAS) Update[C].SBAS IWG 30, Changsha, China, 2016
[2]	Schempp T.WAAS Development Changes Since Commissioning[C].ICAO GBAS/SBAS Implementation Workshop, Seoul, Korea, 2019
[3]	吴云, 杨鑫春, 陈慧.多系统多频率的EGNOS系统完备性模拟分析[J].武汉大学学报·信息科学版, 2012, 37(3):269-273 http://ch.whu.edu.cn/article/id/135 Wu Yun, Yang Xinchun, Chen Hui.Simulation and Analysis of EGNOS System's Integrity Under Multi-system with Multi-frequency[J].Geomatics and Information Science of Wuhan University, 2012, 37(3):269-273 http://ch.whu.edu.cn/article/id/135
[4]	Seynat C, Flament D.European Geostationary Navigation Overlay Service EGNOS Status Update[C].The 23rd International Technical Meeting of the Institute of Navigation, Portland, Oregon, USA, 2010
[5]	Rao K.GAGAN-The Indian Satellite Based Augmentation System[J].Indian Journal of Radio & Space Physics, 2007, 36:293-302
[6]	Saito S.MSAS System Development[C].ICAO GBAS/SBAS Implementation Workshop, Seoul, Korea, 2019
[7]	楼益栋, 郑福, 龚晓鹏.QZSS系统在中国区域增强服务性能评估与分析[J].武汉大学学报·信息科学版, 2016, 41(3):298-303 doi: 10.13203/j.whugis20140273 Lou Yidong, Zheng Fu, Gong Xiaopeng.Evaluation of QZSS System Augmentation Service Performance in China Region[J].Geomatics and Information Science of Wuhan University, 2016, 41(3):298-303 doi: 10.13203/j.whugis20140273
[8]	Cao Yueling, Hu Xiaogong, Wu bin.The Wide Area Difference System for the Regional Satellite Navigation System of Compass[J].Science China Physics, Mechanics and Astronomy, 2012, 55(7):1 307-1 315 doi: 10.1007/s11433-012-4746-1
[9]	RTCA SC-159.Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment[S/OL].[2013-06-25].https://global.ihs.com/doc_detail.cfm?item_s_key=00233409
[10]	Tsai Y.Wide Area Differential Operation of the Global Positioning System: Ephemeris and Clock Algorithms[D].Stanford: Stanford University, 1999
[11]	陈俊平, 杨赛男, 周建华, 等.综合伪距相位观测的北斗导航系统广域差分模型[J].测绘学报, 2017, 46(5):537-546 https://www.cnki.com.cn/Article/CJFDTOTAL-CHXB201705002.htm Chen Junping, Yang Sainan, Zhou Jianhua, et al.A Pseudo Range and Phase Combined SBAS Differential Correction Model[J].Acta Geodaetica et Cartographica Sinica, 2017, 46(5):537-546 https://www.cnki.com.cn/Article/CJFDTOTAL-CHXB201705002.htm
[12]	Juan C.Hughes Aircraft's Architectural Design of the Federal Aviation Administration Wide Area Augmentation System:An International System[J].Acta Astronautica, 1997, 41(4):335-345
[13]	Rouanet L A, Lembachar R, Authié T, et al.New Orbit Determination and Clock Synchronisation Modules for EGNOS[C].The 29th International Technical Meeting of the Institute of Navigation, Portland, Oregon, USA, 2016
[14]	Walter T, Hansen A, Enge P.Message Type 28[C].The 2001 National Technical Meeting of the Institute of Navigation, Long Beach, California, USA, 2001
[15]	Authié T, Trilles S, Fort J C, et al.Integrity Based on MT28 for EGNOS: New Algorithm Formulation & Results[C].The 30th International Technical Meeting of the Institute of Navigation, Portland, Oregon, USA, 2017
[16]	Blanch J, Walter T, Enge P.Evaluation of a Covariance Based Clock and Ephemeris Error Bounding Algorithm for SBAS[C].The 27th International Technical Meeting of the Institute of Navigation, Tampa, Florida, USA, 2014
[17]	Wu J T, Peck S.An Analysis of Satellite Integrity Monitoring Improvement for WAAS[C].The 15th International Technical Meeting of the Institute of Navigation, Portland, Oregon, USA, 2002
[18]	Jefferson D, Bar-Sever Y.Accuracy and Consistency of Broadcast GPS Ephemeris Data[C].The 13th International Technical Meeting of the Institute of Navigation, Salt Lake City, Utah, USA, 2000
[19]	Schempp T R, Peck S R, Fries R M.WAAS Algorithm Contribution to Hazardously Misleading Information[C].The 14th International Technical Meeting of the Institute of Navigation, Salt Lake City, Utah, USA, 2001
[20]	Tang H, Pullen S, Enge P.Ephemeris Type a Fault Analysis and Mitigation for LAAS[C].IEEE/ION Position, Location and Navigation Symposium, Indian Wells, California, USA, 2010
[21]	Hansen A, Walter T, Enge P.GPS Satellite Clock Event on SVN 27 and Its Impact on Augmented Navigation Systems[C].The 11th International Technical Meeting of the Institute of Navigation, Nashville, Tennessee, USA, 1998

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