Results 61 to 70 of about 985 (154)

Sea Surface Height Estimation by Ground-Based BDS GEO Satellite Reflectometry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Chinese BeiDou Navigation Satellite System (BDS) as a mixed constellation consists of not only medium earth orbit (MEO) satellites but also inclined geosynchronous orbit and geostationary earth orbit (GEO) satellites, of which the GEO satellites remain ...
Jianming Wu, Yanling Chen, Fan Gao, Peng Guo, Xiaoya Wang, Xinliang Niu, Mengjie Wu, Naifeng Fu   +7 more
doaj   +1 more source

Tracking Loop Distortion of BDS‐3 B1C Signal in Spoofing Scenarios: An Experimental Analysis

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This study established a feeder‐based BDS spoofing experimental platform and uses multi‐correlator tracking to systematically analyse the tracking loop distortion characteristics of BDS‐3 B1C signals under position and time spoofing, comparing differences between narrowband (NB) and wideband (WB) tracking modes.
Bo Jiao, Yue Wang, Weiping Liu, Lan Du, Lundong Zhang   +4 more
wiley   +1 more source

Satellite-Ground Two-Way Measuring Method and Performance Evaluation of BDS-3 Inter-Satellite Link System

IEEE Access, 2020
From November 2017 to December 2018, Beidou navigation satellite system (BDS) completed the basic system construction of Beidou-3 system (BDS-3) and opened the initial service, BDS-3 satellites are equipped with Ka-band inter-satellite link (ISL ...
Yan Bai, Yanming Guo, Xin Wang, Xiaochun Lu   +3 more
doaj   +1 more source

GNSS Spoofing Detection Based on Ionospheric Model Deviation Monitoring

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
The deviation of TEC (DTEC) consistency between DF measurements and empirical model estimations in authentic scenarios is not zero but is predictable through ionospheric annual periodicity. However, DF spoofers typically struggle to accurately counterfeit the authentic TEC value, which can disrupt the consistency between DTEC measurements and ...
Xiaoxuan Xu, Haixuan Fu, Zhenyang Wu, Yuhao Xiao, Hong Li   +4 more
wiley   +1 more source

Research on integrity and airworthiness compliance technology of BDS airborne receivers in NPA phase

Hangkong gongcheng jinzhan, 2020
The relevant airworthiness standards and integrity airworthiness test process of global navigation satellite system（GNSS） are not fully applicable to BDS airborne equipment.
LIU Ruihua, YU Lantao
doaj   +1 more source

OCDM‐BCS: A Wideband Integrated Navigation and Communication Signal for Next‐Generation LEO Systems Supporting Low‐Altitude UAV Collaborative PNT

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
To meet the high‐performance PNT requirements of the low‐altitude economy, this paper proposes OCDM‐BCS, a novel integrated navigation and communication modulation scheme. Leveraging its linear frequency modulation (LFM) characteristics, OCDM‐BCS demonstrates superior code tracking accuracy, anti‐interference robustness and anti‐multipath capabilities ...
Bofang Chen, Xinming Huang, Zhengshuo Li, Jing He, Hang Gong   +4 more
wiley   +1 more source

Assessing the Feasibility of Automated UAV‐Based Bridge Pillar Inspections Considering GNSS Coverage Constraints

International Journal of Aerospace Engineering, Volume 2026, Issue 1, 2026.
The use of uncrewed aerial vehicles (UAVs) for autonomous infrastructure inspections offers significant advantages in terms of safety, efficiency, and cost. However, the effectiveness of such operations is heavily influenced by the availability of Global Navigation Satellite System (GNSS) coverage, particularly in challenging environments such as under
Gabriel Fontenla-Carrera, Enrique Aldao, Fernando Veiga-López, Higinio González-Jorge, Eduardo Ríos-Otero, Maria-José Morais, José C. Matos, Mohammad Rezwan Habib   +7 more
wiley   +1 more source

BDS-3 Time Group Delay and Its Effect on Standard Point Positioning

Remote Sensing, 2019
The development of the BeiDou navigation system (BDS) is divided into three phases: The demonstration system (BDS-1), the regional system (BDS-2) and the global BeiDou navigation system (BDS-3).
Peipei Dai, Yulong Ge, Weijin Qin, Xuhai Yang   +3 more
doaj   +1 more source

GNSS Signal Multipath Error Analysis and Estimation for Accurate Positioning in Different Scenarios: A Case Study in Bahir Dar City, Ethiopia

International Journal of Antennas and Propagation, Volume 2026, Issue 1, 2026.
Multipath interference remains one of the major limitations affecting the accuracy and reliability of Global Navigation Satellite System (GNSS) positioning, particularly in environments where satellite signals are obstructed or reflected by surrounding structures and vegetation.
Zemene Melaku Azene, Asmamaw Chanie Yehun, Solomon Dargie Chekole, Bekele Bedada Damtie, Habtamu Awulachew Zimbele, Zenabu Getahun Sisay, You Feng Cheng   +6 more
wiley   +1 more source

Improving BeiDou Global Navigation Satellite System (BDS-3)-Derived Station Coordinates Using Calibrated Satellite Antennas and Station Inter-System Translation Parameters

Remote Sensing
The BeiDou global navigation satellite system (BDS-3) has been widely applied in various geodetic applications since its full operation. However, the estimated station coordinates using BDS-3 are less precise compared to GPS results. It contains systematic errors caused by scale bias with respect to International GNSS Service (IGS) 2020 frame and Inter-
Tao Zhang, Shiwei Guo, Lei Fan, Chuang Shi   +3 more
openaire   +2 more sources