A5037133653- GNSS positioning and interference
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Inertial Sensor and Navigation
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Radio Wave Propagation Studies
Shanghai Astronomical Observatory
2012-2024
University of Chinese Academy of Sciences
2016
Shandong University of Science and Technology
2012
Abstract The accurate sea surface wind speed monitoring is important for typhoon warning. Global Navigation Satellite System Reflectometry (GNSS-R) technology provide an approach with benefits of low costs and wide coverage. However, existing GNSS-R based models exhibit high accuracy in retrieving speeds but when dealing speeds. To address this issue, paper proposes a partitioned Gradient Boosting Decision Tree (GBDT) model retrieval. Quality control CYGNSS data carried out the incident...
Abstract With the increased number of Galileo navigation satellites joining Global Navigation Satellite Systems (GNSS) service, there is a strong need for estimating their differential code biases (DCBs) high‐precision GNSS applications. There have been studies DCBs based on an external global ionospheric model (GIM) proposed by Montenbruck et al. (2014). In this study, we take different approach construction GIM and DCB together with multi‐GNSS observations, including GPS, BeiDou system,...
并利用 IGS 最终电离层产品(GIM/IGS)、双频实测 VTEC 和海洋测高数据对该双系统模型的电离层产品进行了全面的精度评估.结果表明: (1) 通过与三种基准 数据比对, GIM/SHA 的外符合精度在 3-6 tecu 范围内, 且系统性偏差较小; (2) GPS 卫星 P1P2 频点 DCB 与 最终产品结果比较 BIAS 在 0.1 ns 内, RMS 最大不超过 0.2 ns; (3) 通过比较 BDS 单系统与双系统 生成的卫星和接收机 B1B2 发现, 两种方法解算的 均值差别为 0.01
Abstract Geomagnetic storms can have a great impact on the Earth's upper atmosphere, that is, ionosphere. The activity of ionosphere could be more pronounced during geomagnetic storms, which make key ionospheric parameters, like total electron content (TEC), very hard to modeled. use Global Navigation Satellite System (GNSS) navigation model is conventional option for users correct delay, suffer from effects storms. In this study, performance Beidou (BDS) in China region main phase different...
The mapping function is crucial for the conversion of slant total electron content (TEC) to vertical TEC low Earth orbit (LEO) satellite-based observations. Instead collapsing ionosphere into one single shell in commonly used models, we defined a new assuming ionospheric distribution as an exponential profiler with simple parameter: plasmaspheric scale height zenith direction LEO satellites. obtained by empirical model introduces spatial and temporal variances function. performance method...
The ionospheric mapping function (IMF) is fundamental in retrieving total electron content (TEC) from observations on board low earth orbiting (LEO) satellites, as well the receiver differential code bias (DCB) estimation. Most IMFs apply assumption that density field spherical symmetric, only dependent elevation angle of signal ray path without considering azimuthal diversity. However, horizontal asymmetry may introduce large errors slant to vertical TEC conversion or vice versa especially...
Geomagnetic storms are one of the space weather events. The radio signals transmitted by modern navigation systems suffer from effects magnetic storms, which can degrade performance whole system. In this study, BeiDou Navigation Satellite System (BDS) B1 frequency standard point positioning (SPP) in China and surrounding area during different classes storm was investigated for first time. statistical analysis results revealed that accuracy BDS-2 SPP deteriorated storms. probability extrema...
Abstract. Geomagnetic storms are one of the space weather events. The radio signals transmitted by modern navigation systems suffer from effects which can degrade performance whole system. In this study, BeiDou Navigation Satellite System (BDS) B1 frequency standard point positioning in China and its surrounding area during different classes is investigated for first time. analysis results revealed that BDS accuracy was deteriorated storms. probability extrema statistics errors strong...