Results 21 to 30 of about 19,364 (340)

Performance Analysis of BDS-3 FCB Estimated by Reference Station Networks over a Long Time

Mathematics, 2022
The stability and validity of the BDS-3 precise point positioning ambiguity solution (PPP-AR) is becoming more and more important along with the development of BDS-3 orbit and clock products over long durations.
Ke Qi, Yamin Dang, Changhui Xu, Shouzhou Gu   +3 more
doaj   +1 more source

Modeling and Analysis of BDS-2 and BDS-3 Combined Precise Time and Frequency Transfer Considering Stochastic Models of Inter-System Bias

Remote Sensing, 2021
BeiDou global navigation satellite system (BDS) began to provide positioning, navigation, and timing (PNT) services to global users officially on 31 July, 2020. BDS constellations consist of regional (BDS-2) and global navigation satellites (BDS-3).
Guoqiang Jiao, Shuli Song, Qinming Chen, Chao Huang, Ke Su, Zhitao Wang, Na Cheng   +6 more
doaj   +1 more source

Helmert Variance Component Estimation for Multi-GNSS Relative Positioning [PDF]

, 2020
The Multi-constellation Global Navigation Satellite System (Multi-GNSS) has become the standard implementation of high accuracy positioning and navigation applications.
Fang, Zhenlong, Mowen, Li, Nie, Wenfeng, Rovira Garcia, Adrià, Xu, Guochang, Xu, Tianhe   +5 more
core   +2 more sources

THE PERFORMANCE ANALYSIS OF BDS POSITIONING IN NORDIC AREAS BASED ON THE SMARTPHONE [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Nowadays, the Global Navigation Satellite System (GNSS) is widely used in many applications. As a new system, China's BeiDou navigation system (BDS) is emerging in recent years.
C. Chen, Y. Chen, C. Jiang, Y. Bo, J. Jia, H. Sun, Z. He   +6 more
doaj   +1 more source

The Initial Performance Evaluation of Mixed Multi-Frequency Undifferenced and Uncombined BDS-2/3 Precise Point Positioning under Urban Environmental Conditions

Remote Sensing, 2022
With the full operation of the global BeiDou navigation satellite system (BDS-3), positioning performance can be further enhanced by BDS-3 combined with the regional BeiDou navigation satellite system (BDS-2).
Fuxin Yang, Chuanlei Zheng, Jie Zhang, Zhiguo Sun, Liang Li, Lin Zhao   +5 more
doaj   +1 more source

Analysis and Assessment of BDS-2 and BDS-3 Broadcast Ephemeris: Accuracy, the Datum of Broadcast Clocks and Its Impact on Single Point Positioning

Remote Sensing, 2020
For the global ordinary users, the broadcast ephemeris plays important roles in positioning, navigation and timing (PNT) services. With the construction of a new generation of the BeiDou navigation satellite system (BDS), the development of BDS has ...
Guoqiang Jiao, Shuli Song, Yangyang Liu, Ke Su, Na Cheng, Shengli Wang   +5 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

Assessment of BeiDou-3 and Multi-GNSS Precise Point Positioning Performance

Sensors, 2019
With the launch of BDS-3 and Galileo new satellites, the BeiDou navigation satellite system (BDS) has developed from the regional to global system, and the Galileo constellation will consist of 26 satellites in space. Thus, BDS, GPS, GLONASS, and Galileo
Guoqiang Jiao, Shuli Song, Yulong Ge, Ke Su, Yangyang Liu   +4 more
doaj   +1 more source

Investigating Performance of BDS-2+3 Dual-Frequency Absolute Positioning With Broadcast Ephemerides, RTS and Final MGEX Products

IEEE Access, 2023
BDS-3 was formally put into service on July 31, 2020, and now along with BDS-2 provides the positioning, navigation and timing services. In this contribution, different techniques of dual-frequency absolute positioning using the fully serviceable BDS-2 ...
Shengnan Liu, Shaolin Zhu, Jian Zhang
doaj   +1 more source

Projected speciality career choices amongst undergraduate dental students in Scotland [PDF]

, 2018
Background: Despite increased numbers of dental specialists, around 90% of dentists in the UK continue to work in general practice. Previous research shows that undergraduate students indicate interest in speciality careers, however few studies have ...
Lee, Yung, Ross, Alastair
core   +1 more source