GNSS Analysis Center at Shanghai Astronomical Observatory (SHA)

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2025

Prof. Junping Chen was honored with the title of "Shanghai Municipal Advanced Worker" on May 9, 2025.（陈俊平研究员于2025年5月9日获颁"上海市先进工作者"荣誉称号。）
SHABDS team members won a special award in the university category of the 2025 Space-Time Intelligent LEO Satellite Application Innovation Competition.（SHABDS团队在“2025时空智联低轨卫星应用创意大赛”中斩获高校组单项奖。）

Prof. Junping Chen serves as the president of the International Association of Chinese Professionals in Global Navigation Satellite Systems (CPGNSS), starting from Jan. 2025.

2024

2024 Nov 8-10, Ph.D. students Ruyuan Wang, Hongyu Zhu, and Siyi Xu each gave a presentation at the National Doctoral Student Academic Forum (Surveying and Mapping Science and Technology)((全国博士生学术论坛(测绘科学与技术)), held in Zhuhai, China.

2024 Sep 3, the project "University-Institute Collaboration, Innovation-Driven Empowerment: Exploration and Practice of Talent Cultivation in Satellite Navigation and Positioning" led by team member Yize Zhang has won the second prize in the 2024 Satellite Navigation and Positioning Excellence in Teaching Achievement Awards. (团队成员张益泽的“校所协同，创新赋能”的卫星导航定位人才培养探索与实践项目获得2024年卫星导航定位优秀教学成果奖二等奖。)

2024 August 23, Group head Junping Chen's project "Research on Enhanced Pseudosatellite Positioning Accuracy under Weak Geometric Configurations" was granted funding from the National Natural Science Foundation of China General Program, while Group member Yize Zhang's project "Real-time UPD Estimation and Orbit Precision Enhancement for China Regional Network based on BeiDou PPP-B2b Service" received funding from the National Natural Science Foundation of China Youth Science Fund.(团队成员陈俊平的“弱几何构型伪卫星定位精度提升方法研究”项目获得国家自然科学基金委面上项目资助，团队成员张益泽的“基于北斗PPP-B2b服务的中国区域网实时UPD估计及轨道精度提升”项目获得国家自然科学基金委青年科学基金资助。)

2024 July 27, during the 2024 CPGNSS Forum in Beijing, Junping Chen delivered a keynote presentation on "Key Technologies for Precise Positioning in the BeiDou Navigation System". Yize Zhang presented a report titled "Real-time Generation of Inter-frequency Satellite Clock Bias Products, Message Broadcast, and Positioning Services". Bin Wang discussed "Advances in the Application of Earth Dynamics in High-Precision Time-Frequency Transfer." Wenjie Tang shared insights on the "Improved Pseudosatellite Tropospheric Delay Model Based on NWM Ray Tracing and Its Performance Evaluation."

2024 July 1-5, Group member Yize Zhang attend the IGS workshop 2024 held in the University of Bern. Yize Zhang gave a poster " URA and STD index for real-time orbit/clock/phase bias corrections at Shanghai Astronomical Observatory" .

2024 June 7, Group member Quanrun Cheng was awarded the honorary title of "Excellent Student Cadre of the University of Chinese Academy of Sciences".(2024年6月7日，团队成员程泉润获中国科学院大学优秀学生干部荣誉称号)
2024 May 28, Group member Quanrun Cheng received the "Excellent Oral Presentation" award at the 2024 Comprehensive Academic Conference on Geodesy and Navigation, held in Xi'an. Quanrun Cheng's presentation was titled "Real-Time Precise Point Positioning Considering the Time-Varying Characteristics of Signal-in-Space Range Error (SISRE)."

2024, May, Group member Weijie Tang is honored as 'the Rising Star in Scientific and Technological Research' by the Shanghai Branch of the Chinese Academy of Sciences. (2024年5月，团队成员唐文杰获2024年度中科院上海分院“科技攻关新星”荣誉称号)

2024, May, Group member Ziyuan Song is honored as "the Outstanding Graduates of Shanghai". (2024年5月，团队成员宋子远获2024年度上海市优秀毕业生称号)

2023

2023 Aug 19-26, Group member Yize Zhang and Bin Wang attended the USRI GASS 2023 Congress held at Sapporo, Japan. Yize Zhang gave a presentation of "Possibility of Centimeter Positioning Accuracy with Ambiguity Resolution from Android GNSS Raw Measurements ". Bin Wang gave a poster of "Analysis of ionospheric cprrections for single-frequency GNSS spaceborne applications ". Yize Zhang received the "Young Scientist Award ".
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2023 May 19, Group member Chao Yu successfully has his thesis defense. "Research on Ambiguity Resolution for Real-rime Precise Point Positioning Considering Orbit Errors(顾及轨道误差的实时精密单点定位模糊度固定算法研究)".
2023 May 19, Group member Peizhao Liu successfully has his thesis defense. "Research on Theory and Software of GNSS Real-Time Filtering Orbit Determination(GNSS 实时滤波定轨理论及软件研究)".
2023 May 19, Group member Junsheng Ding successfully has his thesis defense. "Research on GNSS Tropospheric Delay Modeling and Spatial and Temporal Characterisation Analysis of Bias(GNSS对流层延迟偏差时空特性分析及建模研究)".
2023 May 12-14, Group member Bin Wang, Ph.D students Ziyuan Song and Wenjie Tang attendend The National Doctoral Student Academic Forum (Surveying and Mapping Science and Technology) (全国博士生学术论坛（测绘科学与技术）) which is hold in the city of Lanzhou, China. Ziyuan Song and Wenjie Tang gave oral presentation respectively.
2023, Apr 27, Group member Wenjie Tang is honored as "the Excellent Student Cadres of UCAS". (2023年4月27日，团队成员唐文杰获2023年度国科大优秀学生干部称号)
2023, Apr 27, Group member Junsheng Ding is honored as "the Outstanding Graduates of Shanghai". (2023年4月27日，团队成员丁君生获2023年度上海市优秀毕业生称号)
2023 Apr 21-23, Group head Junping Chen, Group member Yize Zhang, Bin Wang and Weijie Tan, Ph.D student Yangfei Hou, M.Sc student Hongyu Zhu and Wei Song attendend The 5-th Congress of China Geodesy and Geophysics (5-th CCGG) which is hold in the city of Wuhan, China. Prof. Junping Chen chaired the session of G01 "Precision positioning and coordinate reference", and Yize Zhang gave an invited presentation, Bin Wang, Weijie Tan, Yangfei Hou, Hongyu Zhu and Wei Song gave oral presentation respectively.
2023, Apr 18, Group member A.P. Yize Zhang is honored as the URSI Young Scientist Award and is invited to attend the URSI General Assembly and Scientific Symposium at the Sapporo Convention Center, Japan, from 19 to 26 August 2023. (2023年4月18日，团队成员张益泽副研究员荣获URSI青年科学家奖，并受邀参加于2023年8月19日至26日在日本札幌会议中心举办的URSI科学研讨会)
2023, Apr 12, "Astro-geodynamics Forum (No.11)" invites Professor Benjamin Fong Chao of Taiwan Academia Sinica to give a plenary talk on "Applications of geodesy in geophysics".
2023, Mar 21-23, Group head Junping Chen, Group member Bin Wang, Weijie Tan and Yize Zhang attendend the International Top-level Forum on Engineering Science and Technology Strategy & 6th Global Intelligent Industry Conference, Prof. Junping Chen chaired the session of Topic XII "Space-time Information Service in Application Forum", and A.P. Yize Zhang gave a keynote talk on "Wide-area high-precision satellite navigation space-time service platform".

2022

2022, Dec 16, "Astro-geodynamics Forum (No.10)" invites Professor Wu Chen of The Hong Kong Polytechnic University to give a plenary talk on "GNSS Remote Sensing Applications".
2022, Dec 5, Group member Chao Yu is honored as 'the Rising Star in Scientific and Technological Research' by the Shanghai Branch of the Chinese Academy of Sciences. (2022年12月5日，团队成员于超获2022年度中科院上海分院“科技攻关新星”荣誉称号)
2022, Nov 11, "Astro-geodynamics Forum (No.9)" invites Professor Jianjun Zhu of Central South University to give a plenary talk on "Integrated optical remote sensing and SAR technology to monitor glacier dynamics on the Qinghai-Tibet Plateau".
2022, Nov 4, Group member Junsheng Ding won the 2022 National Scholarship for Doctoral Students. (2022年11月4日，团队成员丁君生获2022年度博士研究生国家奖学金)
2022, Oct 28, "Astro-geodynamics Forum (No.8)" invites Professor Zhicai Luo of Huazhong University of Science and Technology to give a plenary talk on "Tianqin II Gravity Satellite Program".
2022, Oct 20, "Astro-geodynamics Forum (No. 7)" invites Professor Hong Guo of Peking University to give a plenary talk on "Quantum precision measurement and quantum information perception technology".
2022, Sep 30, "Astro-geodynamics Forum (No. 6)" invites Professor Qin Zhang of Chang'an University to give a plenary talk on "BDS's contribution to geological disaster monitoring".
2022, Sep 16, "Astro-geodynamics Forum (No. 5)" invites Professor Shaofeng Bian of Naval University of Engineering to give a plenary talk on "Geodesic computer algebraic analysis".
2022, Sep 23, Group member Yize Zhang attendend ION GNSS+ 2022 which is hold in the city of Denver Colorado, Yize Zhang gave a virtual presentations entitled "Evaluation of QZSS Centimeter Level Augmentation System (CLAS): Open-Sky to Urban Environments and Geodetic to Low-Cost Receivers".
2022, Sep 8, "Astro-geodynamics Forum (No. 4)" invites Professor Jianli Chen of PolyU to give a plenary talk on "Global Warming and Climate Change".
2022 Jun, Group member Jie Cui successfully has her thesis defense. "Study on estimation and time-varying characteristics of GNSS differential code biases(GNSS 差分码偏差估计和时变特性研究)".
2022 May 23-27, Group member Jungang Wang, Ph.d students Yangfei Hou and Junsheng Ding attendend The EGU General Assembly 2022 which is hold in the city of Vienna, Austria. Jungang Wang, Yangfei Hou and Junsheng Ding gave oral presentations respectively.
2022 May, Group member Junsheng Ding won the 2022 Zhu-Li-Yuehua Outstanding Doctoral Scholarship of CAS. (2022年5月，团队成员丁君生获2022年度中科院朱李月华优秀博士生奖)
2022 Mar, Group member Donglin Liu successfully has his thesis defense. "The key technology of multi-system PPP-RTK user terminal(多系统 PPP-RTK 定位端关键技术)".
2022 Jan, Group member Lingdong Meng successfully has his thesis defense. "低轨卫星实现GNSS增强若干关键技术研究(Research of the Some Key Technologies for achieveing GNSS Augmentation with LEO Satellites)".

2021

2021 Nov, Group member Jiao Liu successfully has her thesis defense. "Analysis of the International Terrestrial Reference Frames and Construction of Regional Terrestrial Reference Frame(国际地球参考框架特性分析及区域地球参考框架建立)".
2021 Jul 17-18, Group head Junping Chen, Group member Bin Wang and Yize Zhang, Ph.d students Yangfei Hou, Jiao Liu, Junsheng Ding, Ziyuan Song and Ruyuan Wang, MS.c students Jie Cui and Wenjie Tang attendend The 4-th Congress of China Geodesy and Geophysics (4-th CCGG) which is hold in the city of Qingdao, China. Junping Chen gave an invited presentation, Bin Wang, Yize Zhang, Yangfei Hou, Junsheng Ding, Ruyuan Wang, and Wenjie Tang gave oral presentation respectively.
2021 Jun 28 - Jul 2, Group head Junping Chen, Ph.d students Junsheng Ding and Ruyuan Wang, MS.c students Jie Cui and Wenjie Tang attendend The IAG Scientific Assembly 2021 which is hold in the city of Beijing, China. Junsheng Ding gave a oral presentation.
2021 Mar, Group member Qianfeng Yang successfully has his thesis defense. "High-precision Positioning for Real-time of BDS Wide Area Differential System(北斗广域差分实时高精度定位)".
2021 Feb, Associate Professor Yize Zhang returned to the team. (2021年2月，张益泽副研究员回台)

2020

2020 Dec, Group member AHao Wang successfully has his thesis defense. "Research on BDS Satellited-based Augmentation System Decimeter-level Positioning and Multi-GNSS Real-time Single frequency Precise Point Positioning(北斗星基增强分米级定位与 Multi-GNSS 实时单频精密单点定位研究)".
2020 Nov 11-14, Ph.d students Ziyuan Song and Junsheng Ding attendend CPGPS Forum 2020 which is hold in the city of Shanghai, China. Ziyuan Song and Junsheng Ding gave oral presentations respectively.
2020 Nov, Professor Chen Junping is honored as the first prize of the 8th "Contribution Award to Overseas Chinese". (2020年11月，陈俊平研究员获第八届“中国侨界贡献奖”一等奖)
2020 Nov, Professor Chen Junping is honored as the Outstanding Young Science and Technology Innovation Talent Award by Shanghai Branch of the Chinese Academy of Sciences. (2020年11月，陈俊平研究员获中科院上海分院杰出青年科技创新人才奖)
2020, Nov 11, "Astro-geodynamics Forum (No. 3)" invites Academician of CAS Heping Sun and Professor Yunzhong Shen of Tongji University to give plenary talks on "Earth gravity field" and "Satellite gravity" respectively.
2020 Sep, Professor Chen Junping is honored as 'the National Outstanding mid-aged experts'. (2020年9月，陈俊平研究员被授予“国家级有突出贡献中青年专家”荣誉称号)
2020 Aug, Professor Chen Junping is honored as 'Shanghai Outstanding Academic Research Leader'. (2020年8月，陈俊平研究员入选上海市优秀学术带头人)
2020 Jun, Group member Zhuang Ma successfully has his thesis defense. "Real-time Product Positioning Performance Evaluation of MADOCA and Beidou Satellite-based Augmentation System(MADOCA和北斗星基增强系统实时产品定位性能评估)".
2020 May, Group member Guanbin Wu successfully has his thesis defense. "Research on Ionospheric Model and its Assessment Based on Undifferenced and Uncombined Precise Point Positioning(基于非差非组合PPP的电离层模型研究及验证)".
2020 Apr 09, Release of the online PPP/RTK services based on Net_Diff software.
2020 Mar, Group member Yang Zhou successfully has his thesis defense. "Research on Undifferenced and Uncombined Positioning based on Wide Area Differential Service Zone Correction(基于分区综合改正数的非差非组合定位研究)".
2020 Jan 10, Project "Beidou Performance Improvement and Wide-area Decimeter SBAS Technology and Application" completed by the Chen Junping team (Chen Junping, Cao Yueling, Gong Xiuqiang) won Second Class Prizes of The State Scientific and Technological Progress Award in 2019. (2020年1月10日，由陈俊平、曹月玲、巩秀强为主要完成人的“北斗性能提升与广域分米星基增强技术及应用”项目获2019年度国家科学技术进步二等奖)

2019

2019, Dec 23, "Astro-geodynamics Forum (No. 2)" invites Professor Ming Fang of MIT and Professor Xinhao Liao of SHAO to give plenary talks on "Chandler wobble" and "Planetary orbit mechanics" respectively.
2019, Dec 13, Professor Chen Junping won the China Youth Surveying and Mapping Geographic Information Technology Innovation Talent Award.
2019, Nov 27, Dr Bin Wang gave his postdoc report "IMPROVEMENT OF BEIDOU SIGNAL-IN-SPACE ACCURACY WITH PRIORITY TO TIME AND FREQUENCY(时频优先的北斗空间信号精度提升)".
2019, Nov 27, "Astro-geodynamics Forum (No. 1)" invites Academician of CAE Jingnan Liu, Professor Jianhua Zhou of BSNC and Professor Xiaoping Wu of Information Engineering University give plenary talks on "Natural and Artificial Intelligence", "Beidou System" and "Earth gravity field" respectively.
2019, Nov, 17, Group member Qian Chen successfully has her thesis defense. "BDS Orbit Determination Method during the Period of Satellite Maneuver(缩短北斗卫星机动不可用时间的定轨方法研究)".
2019,Otc 26-27,Ph.d students Yangfei Hou and Lingdong Meng attendend The Forum of Ph.D Students 2019 which is organized by the University of Heihai in the city of Najing, China.
2019,Sep 4-6, Prof Junping Chen and Dr Bin Wang attended 2019 Geodesy and Navigation Conference which is organized by Guilin University of Technology. Dr Bin Wang gave an oral presentation.
2019,Aug 15-18,Ph.D student Lingdong Meng attended 7th Advance Technology of Surveying Form which was hold in the city of Xi'an and won third class award for excellent papers.
2019,July 20-22, Prof. Junping Chen and group members Dr Bin Wang and Ph.D student Chao Yu attended the "2019 CPGPS Forum", which is sponsored by the International Association of Chinese Professionals in Global Positioning Systems(CPGPS) and is organized by the Institute of Geodesy and Geophysics Chinese Academy of Science in the city of Wuhan China. Junping Chen gave an invited presentation "GNSS parameter correlation issues and so;utions". Bin Wang and Chao Yu gave oral presentations respectively.
2019,June 29-30, Prof. Junping Chen attend the 21^st annual meeting of the China Association for Science and Technology (CAST), held in Heilongjiang Province, and gave an invited talk in the spatio session.
2019,5.23-5.25,Group members Professor Junping Chen, Dr. Xiuqiang Gong, Dr Bin Wang and Shanqi Huang ,Ph.D students AHao Wang, Lingdong Meng and Yangfei Hou and master student Yang Zhou attended the international conference of China Satellite Navigation Conference(CSNC) 2019,in the city of Beijing. Dr Bian wang gave an oral presentation.
Analysis of Sagnac Correction for Time Transfer in Optical Fibers(EI), by Bin Wang.
2019,5.24, Group member Tianyang Bai successfully has his thesis defense.

"Methodology and Implementation of GPS/BDS Precise Point Positioning(GPS/BDS 精密单点定位方法研究与实现)"

2019, 5.18, Group member Zhihua Dong successfully has his thesis defense.

"Assessment of the Accuracy, Continuity and Consistency of GNSS precise Spatio-temporal Products.(GNSS精密时空产品精度、连续性和一致性分析与评估)"
2019, 4.9-4.12, Dr Bin Wang attended the international conference of 2019 European Navigation Conference(ENC),in the city of Warsow Poland, and gave an oral presentation:
Analysis of Galileo Clock Products of MGEX-ACs(EI), by Bin Wang

2018

11.21-11.23 Group members Ph.D students AHao Wang and Lingdong Meng attended the conference of "INTERBATIONAL SYMPOSIUM ON GNSS 2018 (ISGNSS 2018)" and gave an oral presentation repectively.
10.28-11.02 Group members Dr Bin Wang, Ph.D students Qian Chen, AHao Wang and master stuedent Yu Chao attended the conference of "IGS Workshop 2018". Dr Bin Wang gave an oral presentation.
"The BDS-2 SISRE Refinement(北斗二号空间信号精度提升) " , a project hosted by Professor Junping Chen, was honored with GNSS positioning and navigation technology excellent award. Detailed news please reference to: www.shao.ac.cn/xwzx/ttxw/201809/t20180906_5065173.html.
7.25, Professor Junping Chen attended the 42nd COSPAR Scientific Assembly, held in Passadena USA, and gave an oral presentation ,"An approach for parameter decorrelation in precise dynamic orbit determination".
7.14-7.15,Group members Professor Junping Chen,Dr Bin Wang ,Ph.D students AHao Wang and Lingdong Meng attended the "2018 CPGPS Forum", which is sponsored by the International Association of Chinese Professionals in Global Positioning Systems(CPGPS) and is organized by Chang'an University in the city of Xi'an China. Junping Chen gave an invited presentation " Data Processing Strategies on the Transition from BDS-2 to BDS-3". Bin Wang and Ahao Wang gave oral presentations respectively while Lingdong Meng posted a poster.
6.25-6.29, Dr Bin Wang attended the 2018 European Frequency and Time Seminar, held in Besancon ,France, at Femto-st institute.
5.27,Group member Xiuqiang Gong successfully has his doctoral thesis defense.
"Research On the Accaracy Improvement Of BDS Broadcast Ephemeris and Clock Offset Model(北斗广播星历与钟差模型精度提升方法研究)"
5.23-5.25,Group members Professor Junping Chen, Dr. Xiuqiang Gong, Dr Bin Wang ,Ph.D students Qian Chen AHao Wang and Lingdong Meng and master student Yangfei Hou attended the international conference of China Satellite Navigation Conference(CSNC) 2018,in the city of Haer Bin. Junping Chen gave an invited talk on the status of BDS-2/BDS-3 desired integrated services. Other group members gave 4 oral presentations. Yangfei Hou was awarded the "Best Youth Paper".
"Analysis of BDS Satellite Clock in Orbit with ODTS and TWTT Satellite Clock Data(EI)",by Bin Wang.
"Analysis of BDS Satellite Clock Prediction Contribution to Rapid Orbit Recovery(EI)",by Qian Chen.
"The Service Improvement of BDS Positioning Based on Advanced Equivalent Satellite Clock Calculation(EI&Best Youth Paper)",by Yangfei Hou.
"Real-Time Detection and Repair of Cycle-Slip Based on Pseudo-range Phase Combinations for Un-differenced GNSS Triple-Frequency Observations(EI)",by Lingdong Meng.
4.21-4.22,Professor Junping Chen attended The China Electronic Information Technology Conference,in the city of Su Zhou, and gave an invited talk on LEO/GNSS integrated navigation technology.
4.10-4.12,Dr Bin Wang attended the 32nd European Frequency and Time Forum, held in Torino, Italy, and posted a poster.
"Kalman filter simulation and characterization of BDS satellite clock" ,by Bin Wang.
3.27,Group member Yu Yan successfully has his thesis defense.
"Characteristics of Precise Clock and Precise Orbit Deviation between IGS and Analysis Centers(分析中心精密钟差及轨道数据与IGS最终产品间的特性)"

2017

October 2017 ,AHao Wang (王阿昊) joined the Forum of Ph.D students hold in the university of Henan Polytechnic and was honored with excellent report award.

8.15-8.18 2017 Professor Junping Chen join the international conference of Asia Pacific Space Geodynamics(APSG) and host the session on Geodynamics.

8.6-811 2017 Professor Junping Chen with Dr Weijing Qu Dr Xiuqiang Gong Dr Yueling Cao and Ph.D students Qian Chen attend the international conference of Asia Oceania Geosciences Society(AOGS) hold in Singapore. Professor Chen host the session "Challenges in precise geodetic data analysis and applications". Others give oral presentations.

7.3-7.7 2017 Professor Junping Chen attends IGS workshop held at the University Paris-Diderot in Paris.

5.23-5.25 2017, Group members attend the CSNC conference and give two invited presentations, 4 oral presentations and 2 poster presentations.
"BDS Code Bias and Its Effect on Wide Area Differential Service Performance" by Sainan YANG
"Initial Assessment of BDS Zone Correction" by Yize ZHANG
"Precision Analysis of CNAV Broadcast Ephemeris and Its Impact on the User Positioning", by Ahao WANG
"Realization of BDS Single-Frequency Point Positioning of Sub-Meter Accuracy"

May 2017, Group members Sainan Yang, Yifan Hu, Heng Wang successfully have their thesis defense.

"Research on BDS Decimeter Level SBAS and Its Performance Assesment(北斗分米级增强系统关键技术研究及精度评估)"

"The calibration of antenna PCO\PCV based on navigation satellite orbit(卫星导航天线PCO和PCV在轨标定)"

"Realization of User Program with BDS Decimeter-level Wide-area SBAS(北斗分米级广域差分增强系统用户端算法研究与实现)"

4.30-5.6 2017, Junping attended the ION pacific conference and gave two oral presentations on BDS SIS improvement and the latest GNSS results of the CMONOC network."Recent Results of the Chinese CMONOC GNSS Network"

2016

Sept. 2016,Yu Yan (严宇) joins GGDAA

August 2016, Proposal "Research on the improvement of the spatial and temporal frames for navigation satellite systems" (卫星导航数据处理时空基准精化关键技术研究) is supported by the NSFC program.

May,2016: Junping Chen, Bingbing Duan,Yize Zhang,Sainan Yang et al. participated the Sixth China Satellite Navigation Conference (CSNC) and gave 1 presentation "Mitigation of Orbit Integration Errors for Eclipsing Satellites"

July, 2016: Paper "Modeling and Assessment of GPS/BDS Combined Precise Point Positioning" is published by sensors (2016, 16, 1151; doi:10.3390/s16071151)

May,2016: Junping visit the Central South University(中南大学).

March 2016, Meng Chen (陈猛) successfully pass the defense of Maser thesis on "Performance Evaluation of Troposphere Models in Shanghai" (对流层模型上海地区适用性评估分析)

March 2016 Zefeng Zhang (张泽峰) successfully pass the defense of Maser thesis on "Study of Shanghai Regional Ionospheric VTEC Model" (上海地区GNSS电离层模型研究)

March 2016, Jungang Wang (王君刚) successfully pass the defense of Maser thesis on "GNSS tropospheric delay modeling and application" (GNSS对流层建模与应用)

Jan 31 to Feb 13 2016, Junping attend the IGS workshop 2016 at Sydney and gave one oral and two poster presentations.

2015

November, 2015: Chenghe Fang(房成贺) of Hohai University at Nanjing joins the team, welcome!

October, 2015: Jungang Wang(王君刚) leaves for Hong Kong, and begins new adventure at the Hong Kong Polytechnic University (PolyU).

September, 2015: "Pujiang Scholar(浦江人才)" project receives final evaluation and is successfully completed .

August, 2015: Paper "Analysis of systematic differences from GPS-measured and GRACE-modeled deformation in Central Valley, California" is accepted by Advanced in Space Research for publication

August 26-28, 2015: Jungang Wang attended the 7th International Association of Chinese Professionals In Global Positioning Systems (CPGPS) Forum in Xuzhou, Jiangsu, China and gave on presentation (A Global Tm Empirical Model based on NWM).

August, 2015: Heng Wang (王恒) and AHao Wang (王阿昊) join GGDAA. .

August 2-7, 2015: attended the AOGS 2015 in Singapore and gave 1 presentation (Recent GNSS Results of the CMONOC Network and Application in Natural Hazards Monitoring).

June 22-July 2, 2015: Junping Chen, Shanshi Zhou and Yueling Cao attended the IUGG General Assembly 2015 in Prague and gave 1 presentation (SHAtrop- the new tropospheric delay model over China continent).

May 12-15,2015: Junping Chen, Yize Zhang,Sainan Yang et al. participated the fifth China Satellite Navigation Conference (CSNC) and gave 1 invited presentations (Zone-corrections: a new augmentation information for decimeter-level SBAS system；分区改正数：服务于分米级GNSS星基增强系统的差分改正数).

April 20-23,2015: Junping Chen, Shanshi Zhou, Yueling Cao participated the 2015 Pacific PNT conference and gave Three presentations.( 1: A New Approach for Satellite Based GNSS Augmentation System: from Sub-meter to Better than 0.2 Meter
Era; 2: Real-time Time and Frequency Transfer based on GNSS Network Solution; and 3: Positioning with BeiDou Navigation Satellite System)

April 7, 2015: New project "Research on PCO/PCV calibration of Beidou Satellite Navigation System (BDS)：卫星/接收机PCO/PCV标定技术" were approved and work are on the way.

March 2015, Mao Li (李茂) successfully pass the defense of Maser thesis on "Satellite Orbit and Clock Error Corrections Algorithm in Wide Area Differential System" (广域差分系统的卫星轨道及钟差改正研究)

January 2015:Junping Chen,Yize Zhang,Jungang Wang,et al. published "A simplifed and unified model of multi-GNSS precise point positioning."on Advances in Space Research.

2014

December 27, 2014: Mid-term reports of the 863 project "Research on key issues for the performance improvement of Beidou Satellite Navigation System (BDS) 北斗空间信号精度提升关键技术 " were compiled and evaluated by project evaluation boards.

September, 2014: Meng Chen (陈猛) Joins GGDAA group .

September, 2014: Bingbing Duan (段兵兵) leaves for Munich, Germany, and begins new adventure at the Technique University of Munich.

August, 2014: Qian Chen (陈倩) Joins GGDAA group .

July, 2014: Zefeng Zhang (张泽锋) and Yifan Hu (胡一帆) join GGDAA.

June 2014, Junping attends the IGS Workshop at Passadena and the ICG Group D meeting.

April 2014, Proposal "Decimeter satellite-based wide area augmentation system of Beidou Satellite Navigation System (BDS)" (分米级相位增强信号播发系统技术) is supported by the National High Technology Research and Development Program of China (国家高技术研究发展计划,863计划)

March 2014, Yibing Xie (谢益炳) successfully pass the defense of Maser thesis on "GNSS ionospheric model construction and hardware delay analysis" (GNSS 电离层建模及硬件延迟分析)

March 2014, Wei Yu (余伟) successfully pass the defense of Maser thesis on "High Precision Positioning Research for Single Frequency Receiver" (GNSS单频接收机高精度定位研究)

2013

Dec. 2013: Decimeter wide area real-time positioning results using compass (BDS) data are avialable [COMPASS Wide area augmentation accuracy], Where new design of Augmentation messages, processing scheme and user positioning algorithm are developed.

Oct. 2013: Centimeter Precise Point Positioning (PPP) results using compass (BDS) data and precise products are avialable [COMPASS PPP Repeatability]

September, 2013: BingBing Duan (段兵兵) joins GGDAA.

August 30 - September 7, 2013: Junping Chen attend IAG scientific assembly.

July, 2013: Junping Chen was supported by the "Pujiang Scholar" (浦江人才) Project. (Project: GNSS应用于自然灾害预警与监测的关键问题研
究)

June, 2013: Mao Li (李茂) joins GGDAA.

May, 2013: Junping Chen, Yize Zhang, Wei Yu, Yibing Xie and Sainan Yang attend the CSNC 2013 conference and contribute 3 oral presentations and 2 posters. Junping Chen wins the 'outstanding paper' award (GPS/GLONASS System Bias Estimation and Application in GPS/GLONASS Combined Positioning) .

March, 2013: Jungang Wang (王君刚) joins GGDAA.

March 2013, Mrs Xiao Pei (裴霄) successfully pass the defense of Maser thesis on "GPS/GLONASS Combined Positioning" (GPS/GLONASS 组合定位)

March 2013, Proposal "Research on key issues for the performance improvement of Beidou Satellite Navigation System (BDS)" (北斗空间信号精度提升关键技术) is supported by the National High Technology Research and Development Program of China (国家高技术研究发展计划,863计划)

2012

September, 2012: Sainan Yang (杨赛男) joins GGDAA.

September 23-25,2012: Junping Chen and Yibing Xie attend the first general conference of the GLAC.

August 2012, Proposal "Integrated spatial and temporal frames for Multi-GNSS data analysis" (多卫星导航系统时空基准的统一) is supported by the NSFC program.

August 13-17,2012: Bin Wu, Junping Chen and Xiuqiang Gong attend the AOGS2012 conference in Singapore and gave 1 invited presentations on CMONOC network status, and other 3 oral presentation on the status of GNSS data analysis center of SHAO and the co-location results of the CMONOC network.

July 22-27,2012: Junping Chen participated the IGS Workshop 2012 in Olsztyn, Poland gave 1 invited presentations on GNSS bias results.

May 14-18,2012: Junping Chen, Haojun Li, Xiao Pei & Yize Zhang participated the 3rd China Satellite Navigation Conference (CSNC) and gave 2 presentations (Chen et al; Pei et al).

January,2012: Wei Yu and Yibing Xie join GGDAA.

2011

Nov. 16-24,2011: GGDAA welcomes Dr. Shenyuan Zhu from GFZ Germany. Many topics are discussed, including GGOS activities and GNSS data analysis and applications.

Nov. 09-11,2011: Junping Chen attended the supervisor training program of CAS in Fuzhou, Fujian Province.

Oct. 31,2011: Beginning of the combined GNSS data analysis using ~100 IGS and ~210 CMONOC stations.

Oct. 20,2011: Release of the web of GGDAA and beginning of the http service of SHA products (sp3 orbits and Rinex clocks).

August 8-12,2011: Junping Chen attend the AOGS2011 conference in Taipei and give two talks.

August,2011: Xiao Pei and Yize Zhang join GGDAA.

June. 15,2011: Beginning of the combined daily GNSS data analysis using ~100 GPS+GLONASS stations.

30 Mar. 2019, originator Prof. Junping Chen

(return home)

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