Results 51 to 60 of about 4,913 (184)
Satellite Navigation, 2020 Pseudorange bias has become a practical obstacle in the field of high-precision global navigation satellite system (GNSS) applications, which greatly restricts the further development of high-precision applications.
Chengyan He +5 more
semanticscholar +1 more source
Engineering Reports, Volume 7, Issue 7, July 2025.Some stations have slightly larger errors in mid low latitude regions, while others have slightly smaller errors in high latitude regions. By comparing the B1C/B2a and B2b/B3I IFC SPP results of all 84 stations, it was found that the RMSE of all stations with B2b/B3I IFC was greater than that of B1C/B2a. ABSTRACT This article analyzes the BDS Phase III
Xingli Sun, Jinjie Yao
wiley +1 more source
Sensors, 2016 The Chinese BeiDou navigation satellite system (BDS) aims to provide global positioning service by 2020. The combined use of BDS and Global Positioning System (GPS) is proposed to provide navigation service with more stringent requirements.
Shau-Shiun Jan, An-Lin Tao
doaj +1 more source
Remote Sensing, 2022 The Chinese BeiDou-3 navigation satellite system (BDS-3) is capable of transmitting both old B1I, B3I signals and new B1C, B2a, B2b signals. Current BDS-3 precise orbits are generally calculated using a B1I/B3I combination considering overlap with the ...
Bingfeng Tan, Qingsong Ai, Yunbin Yuan
doaj +1 more source
Review of European, Comparative &International Environmental Law, Volume 34, Issue 1, Page 170-180, April 2025.Abstract Solar radiation modification (SRM) reflects sunlight back into space and could rapidly cool Earth, potentially reducing the harms of dangerous climate change. Current international law fails to directly and comprehensively address the transboundary, regional and global governance challenges that SRM presents.
Rachel Neef
wiley +1 more source
Characteristics of Onefold Clocks of GPS, Galileo, BeiDou and GLONASS Systems
Sensors, 2021 This research is focused on searching for frequency and noise characteristics for available GNSS (Global Navigation Satellite Systems). The authors illustrated frequency stability and noise characteristics for a selected set of data from four different ...
Qingsong Ai +3 more
doaj +1 more source
First Observation of Ionospheric Plasma Bubble Signatures by Ca+ Lidar at Low Latitude
Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.Abstract Ionospheric plasma bubbles refer to density depletion structures in the ionosphere, which are usually seen in the electron density profiles observed by radar, and have never been observed in the density profiles of metallic ions. In this letter, we report the first observation of plasma bubble signatures captured by lidar, manifested as ...
Wenjie Sun +12 more
wiley +1 more source
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.Carry out unified analysis and modelling for the long‐wave ground wave propagation delay affected by multiple factors, so as to improve the accuracy of its delay prediction and the efficiency of engineering implementation. ABSTRACT At present, researchers often focus on various aspects such as the meteorological conditions along the long‐wave ...
Xiaolong Guan +6 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.(1) A robust stochastic modelling approach is proposed for PPP/UWB tightly coupled integration using optimised variance component estimation. (2) In our proposed approach, the VCE‐based stochastic model is optimised with a robust estimation strategy and an adaptive moving window filter technique.
Tonghui Shen +2 more
wiley +1 more source
Journal of Contemporary East Asia Studies, 2022 China’s foremost national goal is to become a major space power by 2030. Consequently, President Xi Jinping has made the launch of the BeiDou navigation satellite system (BDS) and promotion of a “BDS global network” a national priority.BDS represents a ...
Rumi Aoyama
doaj +1 more source