Results 71 to 80 of about 4,913 (184)

Revealing Inconsistencies in ROTI Index Using Multi‐GNSS Constellation Measurements: Impact of Sampling Rates and Time Window

Radio Science, Volume 59, Issue 10, October 2024.
Abstract Understanding ionospheric irregularities and their dynamics is crucial, with the rate of change of the total electron content index (ROTI) serving as a significant metric for this purpose. However, inconsistencies in ROTI magnitudes have been noted when sampled at one‐second interval across various Global Navigation Satellite System (GNSS ...
Yi Sui, Zhe Yang, Weijia Zhan
wiley   +1 more source

Availability evaluation and optimisation of advanced receiver autonomous integrity monitoring fault detection and exclusion considering temporal correlations

IET Radar, Sonar &Navigation, Volume 18, Issue 10, Page 1966-1979, October 2024.
An availability optimisation method of ARAIM FDE based on dynamic budget allocation is proposed to achieve strong integrity monitoring performance. The performances of the baseline algorithm and the proposed method are simulated. Abstract The Advanced Receiver Autonomous Integrity Monitoring (ARAIM) provides an Aircraft‐Based Augmentation System ...
Jingtian Du, Kun Fang, Zhipeng Wang, Yanbo Zhu   +3 more
wiley   +1 more source

Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System

Italian National Conference on Sensors, 2020
The ambiguity resolution (AR) and validation of the global navigation satellite system (GNSS) have been challenging tasks for some decades. Considering the reliability problem of extra-wide-lane (EWL) ambiguity in the triple-carrier ambiguity resolution (
Jian Deng, Aiguo Zhang, Nenghui Zhu, Fuyang Ke   +3 more
semanticscholar   +1 more source

Design of vehicle positioning system based on artificial intelligence cloud computing technology

IET Wireless Sensor Systems, Volume 14, Issue 5, Page 209-222, October 2024.
Vehicle positioning is an important part of intelligent transportation system research. In the tunnel environment, the GPS signal is blocked, which leads to the decrease or even failure of the vehicle positioning accuracy. In order to solve the problem of vehicle positioning in this environment, various vehicle positioning technologies emerge as the ...
Jifeng Liang
wiley   +1 more source

Investigation of the Contribution of Five Broadcast Ionospheric Models (GPSK, NTCMG, NEQG, BDGIM, and BDSK) and IRTG to GNSS Positioning During Different Solar Activities in Solar Cycle 25

Space Weather, Volume 22, Issue 7, July 2024.
Abstract Additional ionospheric information is essential for mitigating errors in single‐frequency (SF) Global Navigation Satellite Systems (GNSS) positioning. The increasing number of low‐cost dual‐frequency (DF) receiver users faces limitations in tracking DF observables compared to traditional geodetic receivers. Consequently, ionospheric correction
Min Li, Yunbin Yuan, Ting Zhang, Hanying Xu, Xingliang Huo, Wenyao Zhang   +5 more
wiley   +1 more source

China's Ground‐Based Space Environment Monitoring Network—Chinese Meridian Project (CMP)

Space Weather, Volume 22, Issue 7, July 2024.
Abstract Monitoring and investigation of the solar‐terrestrial space environment is a huge challenge for humans in space age. To this end, China has established the Ground‐based Space Environment Monitoring Network, namely Chinese Meridian Project (CMP).
Chi Wang, Jiyao Xu, Zhiqing Chen, Hui Li, Xueshang Feng, Zhaohui Huang, Jiangyan Wang   +6 more
wiley   +1 more source

Berkeley‐RWAWC: A New CYGNSS‐Based Watermask Unveils Unique Observations of Seasonal Dynamics in the Tropics

Water Resources Research, Volume 60, Issue 7, July 2024.
Abstract The UC Berkeley Random Walk Algorithm WaterMask from CYGNSS (Berkeley‐RWAWC) is a new data product designed to address the challenges of monitoring inundation in regions hindered by dense vegetation and cloud cover as is the case in most of the Tropics.
Tianjiao Pu, Cynthia Gerlein‐Safdi, Ying Xiong, Mengze Li, Eric A. Kort, A. Anthony Bloom   +5 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

Modeling and Assessment of Precise Time Transfer by Using BeiDou Navigation Satellite System Triple-Frequency Signals

Italian National Conference on Sensors, 2018
This study proposes two models for precise time transfer using the BeiDou Navigation Satellite System triple-frequency signals: ionosphere-free (IF) combined precise point positioning (PPP) model with two dual-frequency combinations (IF-PPP1) and ...
R. Tu, Pengfei Zhang, Rui Zhang, Jinhai Liu, Xiaochun Lu   +4 more
semanticscholar   +1 more source

A Real-Time Detection Method for BDS Signal in Space Anomalies

Sensors, 2019
Signal In Space (SIS) anomalies in satellite navigation systems can degrade satellite-based navigation and positioning performance. The occurrence of SIS anomalies from the BeiDou navigation satellite System (BDS) may be more frequent than for the Global
Chun Cheng, Yuxin Zhao, Liang Li, Lin Zhao   +3 more
doaj   +1 more source