Results 21 to 30 of about 18,049 (264)

Estimation and Analysis of BDS-3 Differential Code Biases from MGEX Observations

Remote Sensing, 2019
The third generation of China’s BeiDou Navigation Satellite System (BDS-3) began to provide global services on 27 December, 2018. Differential code bias (DCB) is one of the errors in precise BDS positioning and ionospheric modeling, but the impacts
Qisheng Wang, Shuanggen Jin, Liangliang Yuan, Youjian Hu, Jie Chen, Jiabin Guo   +5 more
doaj   +1 more source

Clustering Code Biases between BDS-2 and BDS-3 Satellites and Effects on Joint Solution

Remote Sensing, 2020
China’s BeiDou navigation satellite system (BDS) has finished global constellation construction and can achieve joint solution, simultaneously relying on the B1I + B3I signals of the BDS-2 and BDS-3 satellites.
Liang Chen, Min Li, Ying Zhao, Fu Zheng, Xuejun Zhang, Chuang Shi   +5 more
doaj   +1 more source

Algorithms Research and Precision Comparison of Different Frequency Combinations of BDS-3\GPS\Galileo for Precise Point Positioning in Asia-Pacific Region

Sensors, 2023
With the continuous construction and development of the BeiDou navigation satellite system (BDS), its positioning performance is constantly being improved.
Meng Gao, Zhihua Cao, Ziheng Meng, Chunbo Tan, Huizhong Zhu, Lu Huang   +5 more
doaj   +1 more source

Epoch-by-epoch estimation and analysis of BeiDou Navigation Satellite System (BDS) receiver differential code biases with the additional BDS-3 observations [PDF]

Annales Geophysicae, 2020
The differential code bias (DCB) of the Global Navigation Satellite System (GNSS) is an important error source in ionospheric modeling, which was generally estimated as constants every day.
Q. Wang, Q. Wang, Q. Wang, S. Jin, S. Jin, S. Jin, Y. Hu   +6 more
doaj   +1 more source

Performance of BDS-3: Measurement Quality Analysis, Precise Orbit and Clock Determination

Sensors, 2017
Since 2015, China has successfully launched five experimental BeiDou global navigation system (BDS-3) satellites for expanding the regional system to global coverage.
Xin Xie, Tao Geng, Qile Zhao, Jingnan Liu, Bin Wang   +4 more
doaj   +1 more source

Performance Evaluation of Precise Point Positioning for BeiDou-3 B1c/B2a Signals in the Global Range

Sensors, 2021
With the construction and development of the BeiDou navigation satellite system (BDS), the precise point positioning (PPP) performance of the BDS is worthy of research.
Ershen Wang, Tao Yang, Zhi Wang, Yize Zhang, Jing Guo, Wansen Shu, Pingping Qu   +6 more
doaj   +1 more source

Positioning Performance Comparison Between GPS and BDS With Data Recorded at Four MGEX Stations

IEEE Access, 2020
In December 2018, the BeiDou III (BDS-3) basic system was completed and began to provide global services. along with the BeiDou second-generation satellite navigation system (BDS-2) and Beidou first-generation satellite navigation system (BDS-1), the ...
Xiaping Ma, Kegen Yu, Xiaoxing He, Jean-Philippe Montillet, Qinzheng Li   +4 more
doaj   +1 more source

Bipolar disorders in Nigeria: a mixed-methods study of patients, family caregivers, clinicians, and the community members’ perspectives

International Journal of Bipolar Disorders, 2023
Background Bipolar Disorders (BDs) are chronic mental health disorders that often result in functional impairment and contribute significantly to the disability-adjusted life years (DALY).
Dung Ezekiel Jidong, M. Ishrat Husain, Tarela J. Ike, Nusrat Husain, Maigari Yusufu Taru, Nwoga Charles Nnaemeka, Christopher Francis, David B. Jack, Shadrack B. Mwankon, Siqi Xue, Juliet Y. Pwajok, Pam P. Nyam, Maisha Murshed   +12 more
doaj   +1 more source

Performance Assessment of BDS-2/BDS-3/GPS/Galileo Attitude Determination Based on the Single-Differenced Model with Common-Clock Receivers

Remote Sensing, 2021
Global navigation satellite system (GNSS)-based attitude determination has been widely applied in a variety of fields due to its high precision, no error accumulation, low power consumption, and low cost. Recently, the emergence of common-clock receivers
Mingkui Wu, Shuai Luo, Wang Wang, Wanke Liu   +3 more
doaj   +1 more source

Competition Pattern and Coping Strategies in Near Space [PDF]

中国工程科学
The near space serves as a transition area between airspace and the outer space, and it has unique strategic values and broad application prospects, attracting countries to compete for development.
Junlin Yang, Jingfan Yang, Dongxu Liu, WenQing Zhang, Lijing Li   +4 more
doaj   +1 more source