Results 41 to 50 of about 361 (154)

Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias

Remote Sensing, 2020
The accuracy of the timing group delay (TGD) transmitted in the broadcast ephemeris is an important factor that affects the service performance of a GNSS system.
Yize Zhang, Hu Wang, Junping Chen, Ahao Wang, Lingdong Meng, Ershen Wang   +5 more
doaj   +1 more source

Improved Antenna Phase Center Offsets for BDS-2 IGSO/MEO Satellites Based on MGEX Long-Term Observations

IEEE Access, 2020
For the purpose of further improving the solution accuracies of the orbital and geodetic parameters for BDS (BeiDou Navigation Satellite System) precise applications, this paper focuses on the enhancements of antenna phase center offsets (PCOs) for BDS-2
Lina He, Ping Zeng, Hairui Zhou, Yuanlan Wen   +3 more
doaj   +1 more source

Studying Ionosphere Responses to a Geomagnetic Storm in June 2015 with Multi-Constellation Observations

Remote Sensing, 2018
The Global Navigation Satellite System (GNSS) observations with global coverage and high temporal and spatial resolution, provide abundant and high-quality Earth-ionosphere observations.
Yang Liu, Lianjie Fu, Jinling Wang, Chunxi Zhang   +3 more
doaj   +1 more source

Research on Blunder Detection Methods of Pseudorange Observation in GNSS Observation Domain

Remote Sensing, 2022
Global Navigation Satellite System (GNSS) signal quality, type of receiver equipment, and external environment can cause GNSS observations to be anomalous, and these anomalies are sometimes reflected in GNSS pseudorange observations rather than phase ...
Xiaping Ma, Qing Wang, Kegen Yu, Xiaoxing He, Lidu Zhao   +4 more
doaj   +1 more source

Validation and Assessment of Multi-GNSS Real-Time Precise Point Positioning in Simulated Kinematic Mode Using IGS Real-Time Service

Remote Sensing, 2018
Precise Point Positioning (PPP) is a popular technology for precise applications based on the Global Navigation Satellite System (GNSS). Multi-GNSS combined PPP has become a hot topic in recent years with the development of multiple GNSSs.
Liang Wang, Zishen Li, Maorong Ge, Frank Neitzel, Zhiyu Wang, Hong Yuan   +5 more
doaj   +1 more source

Analysis of Ionospheric Disturbances Near 120°E in the Asia‐Pacific Sector During the May 2024 Superstorm Using Multi‐Instrument Observations

Space Weather, Volume 24, Issue 2, February 2026.
Abstract On 10 May 2024, a severe G5 geomagnetic storm—the most intense of solar cycle 25—significantly disturbed the global ionosphere. This study presents a comprehensive analysis using multi‐instrument observations, including ground‐based measurements from BDS‐GEO total electron content (TEC), digital ionosondes, and magnetometers; model outputs ...
Yue Sun, Jun Tang, Hanyang Teng, Chaoqian Xu, Liang Zhang   +4 more
wiley   +1 more source

Performance Evaluation of the Dual‐Frequency Ionospheric Free Combination on BDS‐3 Single Point Positioning Accuracy

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

Alley Cropping Can Potentially Alter the Nitrogen and Carbon Soil Cycles and Increase the Abundance of Beneficial Bacteria in a Mediterranean Citrus Orchard

Journal of Sustainable Agriculture and Environment, Volume 4, Issue 2, June 2025.
ABSTRACT Monocrop of mandarin leading to reduced soil biodiversity and functionality that must be changed to a sustainable agriculture practice such as alley cropping. In this study an attempt has been made to assess how two different alley cropping strategies promote soil bacterial diversity, microbial activities and the abundance of beneficial ...
Margarita Ros, Jessica Cuartero, Onurcan Özbolat, Virginia Sánchez‐Navarro, Marcos Egea‐Cortines, Maria Almagro, María Hurtado‐Navarro, Maria Martinez‐Mena, Jose Antonio Pascual, Raúl Zornoza   +9 more
wiley   +1 more source

High‐Precision Prediction of Ionospheric TEC in the China Region Based on CMONOC High‐Resolution Data and an Auxiliary Attention Temporal Convolutional Network

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 2, June 2025.
Abstract Accurate prediction of Total Electron Content (TEC) in the ionosphere is crucial for navigation, communication, and space weather forecasting. However, the Global Ionosphere Maps provided by the International GNSS Service have limitations in resolution and adaptability in the China region, making high‐precision predictions difficult.
Jianghe Chen, Pan Xiong, Haochen Wu, Xiaoran Zhang, Xuemin Zhang, Rongzi Chai, Ting Zhang, Kaixin Wang, Chaoyu Wang   +8 more
wiley   +1 more source

The Preliminary Results for Five-System Ultra-Rapid Precise Orbit Determination of the One-Step Method Based on the Double-Difference Observation Model

Remote Sensing, 2018
The predicted parts of ultra-rapid orbits are important for (near) real-time Global Navigation Satellite System (GNSS) precise applications; and there is little research on GPS/GLONASS/BDS/Galileo/QZSS five-system ultra-rapid precise orbit determination;
Fei Ye, Yunbin Yuan, Bingfeng Tan, Zhiguo Deng, Jikun Ou   +4 more
doaj   +1 more source