Wei Yuan
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View article: Statistical Analysis of Machine Learning‐Derived Equatorial Plasma Bubble Characteristics From Airglow Observations in Southern China During a Solar Cycle
Statistical Analysis of Machine Learning‐Derived Equatorial Plasma Bubble Characteristics From Airglow Observations in Southern China During a Solar Cycle Open
The equatorial plasma bubble (EPB) evolutionary behavior in the Chinese sector remains poorly understood due to insufficient long‐term statistical characterization. Leveraging prior machine learning frameworks, this work presents the first…
View article: Extreme concentric gravity waves observed in the mesosphere and thermosphere regions over southern Brazil associated with fast-moving severe thunderstorms
Extreme concentric gravity waves observed in the mesosphere and thermosphere regions over southern Brazil associated with fast-moving severe thunderstorms Open
Three groups of intense concentric gravity waves (CGWs) lasting over 10 h were observed by an airglow imager at the Southern Space Observatory (SSO) in São Martinho da Serra (29.44° S, 53.82° W) in southern Brazil on 17–18 September 2023. …
View article: Multi‐Technique Study of the Thermospheric Wind Responses to the November 3–4, 2021 Storm
Multi‐Technique Study of the Thermospheric Wind Responses to the November 3–4, 2021 Storm Open
The responses of thermospheric winds at mid and low latitudes to the intense geomagnetic storm of November 3–4, 2021, are examined using multi‐technique observations and simulations with the Thermosphere Ionosphere Electrodynamics General …
View article: Validation of Neutral Wind in the Mesopause Measured by a Dual‐Channel Optical Interferometer (DCOI) Network of the Chinese Meridian Project
Validation of Neutral Wind in the Mesopause Measured by a Dual‐Channel Optical Interferometer (DCOI) Network of the Chinese Meridian Project Open
A Dual‐Channel Optical Interferometer (DCOI) based on Asymmetric Spatial Heterodyne Spectroscopy technique has been deployed at 11 stations by Phase II of the Chinese Meridian Project, establishing a ground‐based network for routine neutra…
View article: Statistical Analysis of Machine Learning-Derived Equatorial Plasma Bubble Characteristics from Airglow Observations in Southern China During a Solar Cycle
Statistical Analysis of Machine Learning-Derived Equatorial Plasma Bubble Characteristics from Airglow Observations in Southern China During a Solar Cycle Open
View article: Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms
Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms Open
The Risley prism system offers advantages such as compact structure and excellent dynamic performance, making it suitable for installation on static and motion platforms for target acquisition, aiming, and tracking. This paper presents a s…
View article: Automatic Detection and Feature Extraction of Equatorial Plasma Bubbles From All‐Sky Airglow Image Based on Machine Learning
Automatic Detection and Feature Extraction of Equatorial Plasma Bubbles From All‐Sky Airglow Image Based on Machine Learning Open
We developed a deep convolutional neural network‐based program code that automatically detects equatorial plasma bubbles (EPBs), segments EPB morphologies, and then extracts their features (including EPBs' northernmost foot latitudes and z…
View article: Time-varying formation control with obstacle avoidance for fractional-order multi-agent systems
Time-varying formation control with obstacle avoidance for fractional-order multi-agent systems Open
Aiming at the consensus of relative position considering obstacle avoidance for fractional-order multi-agent system, a novel distributed control algorithm is proposed in this paper. Firstly, a synthetic error of each agent under the influe…
View article: Extreme Concentric Gravity Waves Observed in the Mesosphere and Thermosphere Regions over Southern Brazil Associated with Fast-Moving Severe Thunderstorms
Extreme Concentric Gravity Waves Observed in the Mesosphere and Thermosphere Regions over Southern Brazil Associated with Fast-Moving Severe Thunderstorms Open
Three groups of intense CGWs lasting over 10 hours were observed by an airglow imager at the Southern Space Observatory (SSO) in São Martinho da Serra (29.44° S, 53.82° W) in southern Brazil on 17–18 September 2023. These CGW events were s…
View article: Validation of Atmospheric Wind Fields from MIGHTI/ICON: A Comprehensively Comparative Analysis with Meteor Radars, FPI and TIMED/TIDI
Validation of Atmospheric Wind Fields from MIGHTI/ICON: A Comprehensively Comparative Analysis with Meteor Radars, FPI and TIMED/TIDI Open
The Michelson interferometer for global high-resolution thermospheric imaging (MIGHTI) aboard the NASA ionospheric connection (ICON) satellite offers extensive atmospheric wind field data for mid-latitude regions and has recently released …
View article: Transformative Impacts of AI and Wireless Communication in CSP Heliostat Control Systems
Transformative Impacts of AI and Wireless Communication in CSP Heliostat Control Systems Open
In this review, the transformative impact of integrating artificial intelligence (AI) and wireless communication technologies into the heliostat control systems of concentrated solar power (CSP) plants are explored. Heliostat control syste…
View article: Passivity-Based Safe Maneuvering Control of Mechanical Systems With Input Constraints
Passivity-Based Safe Maneuvering Control of Mechanical Systems With Input Constraints Open
For mechanical systems with input constraints, safe maneuvering control is investigated in this paper. How to accomplish the maneuvering task without violating safety constraints is the main challenge. To address the input constraints, the…
View article: Three-dimensional spectral analysis of gravity waves from airglow observations over Northwest China
Three-dimensional spectral analysis of gravity waves from airglow observations over Northwest China Open
The three-dimensional spectral analysis method was applied to airglow data from September 2023 to August 2024 derived from an OH airglow imager located at the Hejing station (42.79°N, 83.73°E) to study the propagation characteristics of gr…
View article: Influence of global warming and human activity on mercury accumulation patterns in wetlands across the Qinghai–Tibet Plateau
Influence of global warming and human activity on mercury accumulation patterns in wetlands across the Qinghai–Tibet Plateau Open
Wetlands in the Qinghai–Tibet Plateau are a unique and fragile ecosystem undergoing rapid changes. We show two unique patterns of mercury (Hg) accumulation in wetland sediments. One is the ‘surface peak’ in monsoon-controlled regions and t…
View article: A Three‐Frequency Ca<sup>+</sup> Doppler Lidar for Ion Temperature Measurements in the E and F Regions
A Three‐Frequency Ca<sup>+</sup> Doppler Lidar for Ion Temperature Measurements in the E and F Regions Open
The ion temperature is an important parameter for ionospheric detection, yet there is limited research on ion temperatures at altitude range from 80 to 300 km. Currently, a single‐frequency Ca + ion optical parametric oscillator (OPO) Lida…
View article: Upper-atmosphere responses to the 2022 Hunga Tonga–Hunga Ha′apai volcanic eruption via acoustic gravity waves and air–sea interaction
Upper-atmosphere responses to the 2022 Hunga Tonga–Hunga Ha′apai volcanic eruption via acoustic gravity waves and air–sea interaction Open
A multi-group of strong atmospheric waves (wave packet nos. 1–5) over China associated with the 2022 Hunga Tonga–Hunga Ha′apai (HTHH) volcano eruptions were observed in the mesopause region using a ground-based airglow imager network. The …
View article: Traveling Ionospheric Disturbance Events with Special Propagation Direction Based on Double-layer Airglow Observation
Traveling Ionospheric Disturbance Events with Special Propagation Direction Based on Double-layer Airglow Observation Open
View article: Comparison of FY3D/GNOS Atmospheric Occultation Detection Temperature with TIMED/ SABER Temperature and NRLMSISE00 Model Temperature
Comparison of FY3D/GNOS Atmospheric Occultation Detection Temperature with TIMED/ SABER Temperature and NRLMSISE00 Model Temperature Open
大气温度数据的精确探测对于研究中高层大气的结构特征和动力学过程具有重要意义. 利用2019年1月至2021年12月共3年的FY3D掩星观测数据, 借助TIMED/SABER探测数据和NRLMSISE00大气模式数据, 对12～100 km范围内的大气温度数据进行比较. 统计分析SABER-FY3D温度偏差(TSABER-TFY3D)和NRLMSISE00-FY3D温度偏差(TNRLMSISE00-T…
View article: Upper Atmosphere Responses to the 2022 Hunga Tonga-Hunga Ha’apai Volcanic Eruption via Acoustic-Gravity Waves and Air-Sea Interaction
Upper Atmosphere Responses to the 2022 Hunga Tonga-Hunga Ha’apai Volcanic Eruption via Acoustic-Gravity Waves and Air-Sea Interaction Open
Multi-group of strong atmospheric waves (wave packet #1–#5) over China associated with the 2022 Hunga Tonga–Hunga Ha’apai (HTHH) volcano eruptions were observed in the mesopause region using a ground-based airglow network. The phase speed …
View article: Statistical Characteristics of Nighttime Medium‐Scale Traveling Ionospheric Disturbances From 10‐Years of Airglow Observation by the Machine Learning Method
Statistical Characteristics of Nighttime Medium‐Scale Traveling Ionospheric Disturbances From 10‐Years of Airglow Observation by the Machine Learning Method Open
For the first time, we used the machine learning method to analyze the statistical occurrence and propagation characteristics of nighttime medium‐scale traveling ionospheric disturbances (MSTIDs) from October 2011 to December 2021 observed…
View article: Multi‐Source Perturbations in the Evolution of a Low‐Latitudinal Equatorial Plasma Bubble Event Occurred Over China
Multi‐Source Perturbations in the Evolution of a Low‐Latitudinal Equatorial Plasma Bubble Event Occurred Over China Open
In this paper, multi‐source perturbations during the evolution of an equatorial plasma bubble (EPB) event at low latitudes in China are studied by means of multi‐ground‐based instruments, including an all‐sky airglow imager, a very high fr…
View article: Evolution of Equatorial Plasma Bubbles Group Simultaneously Observed by Multi-instruments over China
Evolution of Equatorial Plasma Bubbles Group Simultaneously Observed by Multi-instruments over China Open
利用子午工程富克站（19.5°N, 109.1°E）全天空气辉成像仪、VHF雷达、三亚站（18.4°N, 109.6°E）数字测高仪及C/NOFS卫星观测数据，对2014年3月30日中国上空的等离子体泡进行了研究。结果表明，当天夜间观测到一个等离子体泡群，约由9个等离子体泡组成，发生在日落后，一直持续到午夜后。其自西向东运动，南北向最大尺度超过1200 km，东西向绵延超过1400 km，在演化中部分结构融合在一起。等离子体泡被气辉成像仪观测到的同时，数字测高仪及VHF雷达…
View article: How do gravity waves triggered by a typhoon propagate from the troposphere to the upper atmosphere?
How do gravity waves triggered by a typhoon propagate from the troposphere to the upper atmosphere? Open
Gravity waves (GWs) strongly affect atmospheric dynamics and photochemistry and the coupling between the troposphere, stratosphere, mesosphere, and thermosphere. In addition, GWs generated by strong disturbances in the troposphere (e.g. th…
View article: First Lidar Profiling of Meteoric Ca<sup>+</sup> Ion Transport From ∼80 to 300 km in the Midlatitude Nighttime Ionosphere
First Lidar Profiling of Meteoric Ca<sup>+</sup> Ion Transport From ∼80 to 300 km in the Midlatitude Nighttime Ionosphere Open
We report a world record of lidar profiling of metallic Ca + ions up to 300 km in the midlatitude nighttime ionosphere during geomagnetic quiet time. Ca + measurements (∼80–300 km) were made over Beijing (40.42°N, 116.02°E) with an Optical…
View article: Comment on acp-2021-952
Comment on acp-2021-952 Open
Abstract. Gravity waves (GWs) strongly affect atmospheric dynamics, and photochemistry, as well as the coupling between the troposphere, stratosphere, mesosphere, and thermosphere. Also, GWs generated by strong disturbance…
View article: Reply on AC1
Reply on AC1 Open
Gravity waves (GWs) strongly affect atmospheric dynamics, and photochemistry, as well as the coupling between the troposphere, stratosphere, mesosphere, and thermosphere. Also, GWs generated by strong disturbances in the troposphere (such …
View article: How are the gravity waves triggered by typhoon propagate from the troposphere to upper atmosphere?
How are the gravity waves triggered by typhoon propagate from the troposphere to upper atmosphere? Open
Gravity waves (GWs) strongly affect atmospheric dynamics, and photochemistry, as well as the coupling between the troposphere, stratosphere, mesosphere, and thermosphere. Also, GWs generated by strong disturbances in the troposphere (such …
View article: Research on Long-distance MSTID Event Observed by Multi-instruments over Mid-latitude Regions of China
Research on Long-distance MSTID Event Observed by Multi-instruments over Mid-latitude Regions of China Open
Ionospheric plasma irregularities have always been one of the research focuses in space physics. These irregularities usually have impacts on satellite communication, navigation as well as positioning system. It is of great importance to s…
View article: Joint observation of the concentric gravity wave event on the Tibetan Plateau
Joint observation of the concentric gravity wave event on the Tibetan Plateau Open
A concentric gravity wave event was captured by a photographer in Nagarzê County (90.28°N, 28.33°E) between 02:00 and 04:00 (local time) on May 11, 2019. This concentric gravity wave event was also observed by the Suomi National Polar-orbi…
View article: First Lidar Profiling of Meteoric Ca+ Ion Transport from ~80 to 300 km in the Midlatitude Nighttime Ionosphere
First Lidar Profiling of Meteoric Ca+ Ion Transport from ~80 to 300 km in the Midlatitude Nighttime Ionosphere Open
The attached data is used for the paper.