Results 1 to 10 of about 16,286 (236)

Improved Short-Term Clock Prediction Method for Real-Time Positioning

Sensors, 2017
The application of real-time precise point positioning (PPP) requires real-time precise orbit and clock products that should be predicted within a short time to compensate for the communication delay or data gap. Unlike orbit correction, clock correction
Yifei Lv, Zhiqiang Dai, Qile Zhao, Sheng Yang, Jinning Zhou, Jingnan Liu   +5 more
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Role, path, and vision of “5G + BDS/GNSS”

Satellite Navigation, 2020
Communication, positioning, navigation, and decision-making abilities have evolved into Positioning, Navigation, and Timing (PNT) intelligence during the long process of human migration and hence promoted human evolution.
Jingnan Liu, Kefu Gao, Wenfei Guo, Jingsong Cui, Chi Guo   +4 more
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2D LiDAR SLAM Back-End Optimization with Control Network Constraint for Mobile Mapping

Sensors, 2018
Simultaneous localization and mapping (SLAM) has been investigated in the field of robotics for two decades, as it is considered to be an effective method for solving the positioning and mapping problem in a single framework.
Jingren Wen, Chuang Qian, Jian Tang, Hui Liu, Wenfang Ye, Xiaoyun Fan   +5 more
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National BDS Augmentation Service System (NBASS) of China: Progress and Assessment

Remote Sensing, 2017
: In this contribution, the processing strategies of real-time BeiDou System (BDS) precise orbits, clocks, and ionospheric corrections in the National BDS Augmentation Service System (NBASS) are briefly introduced.
Chuang Shi, Fu Zheng, Yidong Lou, Shengfeng Gu, Weixing Zhang, Xiaolei Dai, Xianjie Li, Hailin Guo, Xiaopeng Gong   +8 more
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Characteristics of BeiDou-3 Experimental Satellite Clocks

Remote Sensing, 2018
The characteristics of the improved Atomic Frequency Standard (AFS) operated on the latest BeiDou-3 experimental satellites are analyzed from day-of-year (DOY) 254 to 281, of the year 2017, considering the following three aspects: stability, periodicity,
Yifei Lv, Tao Geng, Qile Zhao, Jingnan Liu   +3 more
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BeiDou Geostationary Satellite Code Bias Modeling Using Fengyun-3C Onboard Measurements

Sensors, 2017
This study validated and investigated elevation- and frequency-dependent systematic biases observed in ground-based code measurements of the Chinese BeiDou navigation satellite system, using the onboard BeiDou code measurement data from the Chinese ...
Kecai Jiang, Min Li, Qile Zhao, Wenwen Li, Xiang Guo   +4 more
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Comparative Analysis of Higher‐Order Ionospheric Delay on PPP Long‐Term Coordinate Time Series and Residual Modeling Using Horizontal Gradients and RINEX Data

Space Weather
Higher‐order ionospheric corrections, including second‐ and third‐order effects and signal bending, are essential for improving Global Navigation Satellite System (GNSS) time series accuracy.
Kaichun Yang, Weiping Jiang, Zhao Li, Xin Ding, Ran Lu   +4 more
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Contribution of SLR observations to precise orbit determination and geocenter motion estimation using Galileo and Sentinel-6A satellites as space ties

Geo-spatial Information Science
The GNSS and SLR observation capabilities of both the Galileo and Sentinel-6A satellites provide potential space ties, improving the accuracy of orbit and geocenter motion measurements. This study seeks to evaluate the influence of SLR data on the orbits
Weiping Jiang, Zilu Cui, Hua Chen, Xingyu Zhou, Tianjun Liu, Zhao Li   +5 more
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A novel mode of INS-aided BDS real-time high-rate and precise kinematic relative positioning between two moving platforms

Geo-spatial Information Science
For kinematic relative positioning users between two moving platforms, limited communication bandwidth and computation ability usually cannot support real-time transmission of high-rate (≥10 Hz) BeiDou Navigation Satellite System (BDS) data.
Yangyang Li, Weiming Tang, Chenlong Deng, Xuan Zou, Siyu Zhang, Kepei Qi, Chao Sun   +6 more
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Impacts of Period Offset and Period Variation on modeling seasonal signals in GNSS coordinate time series from both theoretical and practical perspectives

Geo-spatial Information Science
Global Navigation Satellite System (GNSS) coordinate time series exhibit significant periodic characteristics. The existing studies mainly focus on obtaining accurate amplitude and phase of periodic signals, while the period lengths are commonly set as ...
Zhao Li, Kaichun Yang, Weiping Jiang, Liansheng Deng, Yong Zou   +4 more
doaj   +1 more source