A5085585386- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- GNSS positioning and interference
- Smart Agriculture and AI
- Remote Sensing in Agriculture
- Soil Geostatistics and Mapping
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Atmospheric Ozone and Climate
- Digital Communication and Language
- Hate Speech and Cyberbullying Detection
- Text Readability and Simplification
Wuhan University
2023-2025
Zhejiang University
2024
Abstract In this study, we propose a machine learning based approach to construct an empirical model of thermospheric mass densities, on the MultiLayer Perceptron and bi‐directional Long Short‐Term Memory for ensemble (MBiLE). The MBiLE was trained by using only density from Swarm C satellite at ∼450 km altitude. To assess performance model, predictions were compared with observations several satellites, namely, C, Challenging Minisatellite Payload (CHAMP) Gravity Field Steady‐State Ocean...
Abstract With rapid development of artificial intelligence technology, machine learning has been widely applied to the thermospheric mass density (TMD) modeling. In this study we propose a machine‐learning approach, bidirectional gated recurrent unit with multi‐head attention mechanism (BGMA), for modeling and predicting TMD, based on Gravity Recovery Climate Experiment (GRACE) satellite data. GRACE data spanning over one solar cycle provide valuable opportunity explore altitude activity...
Abstract In this study, we focus on the presence of ionospheric third plasma density peak associated with equatorial ionization anomaly (EIA) based observations from ESA's Swarm constellation. By statistically analyzing peaks observed by A and B at two different altitudes, found that such structure appears mainly around ±20° magnetic latitude (Mlat), namely poleward EIA crests. meanwhile, shows prominent season local time dependences, are in summer hemisphere during solstice seasons highest...
Abstract In this study we used the Level‐2 product of field‐aligned currents (FACs) from Swarm satellites, to check distribution characteristics small‐scale FACs (SSFACs) intense amplitude. Data applied covers 9 years December 2013 April 2023. Based on statistical analysis amplitude, SSFACs in is defined with amplitude larger than 20 μA/m 2 , which also by two orders well‐known large‐scale R1 and R2 (about 0.2 ). Such an indicates that it should play important role magnetosphere‐ionosphere...
Disturbances in the ionosphere can severely affect synthetic aperture radar (SAR) acquisition and also accuracy of differential SAR interferometry (D-InSAR) techniques. Focusing on mid-latitudes, we report for first time effect small-scale ionospheric irregularities interferograms generated by C-band Sentinel-1 satellite. The obtained during geomagnetic storm 4 November 2021 showed finger-like stripes phase artefacts, while non-storm days did not show such anomalies. Such artefacts introduce...
The Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) onboard the Ionospheric Connection Explorer (ICON) mission provides a good opportunity to investigate altitude profile of thermospheric wind. In this study, we used red line measurements MIGHTI compare with estimated results by Horizontal Wind Model (HWM-14). Data selected include both geomagnetic quiet period (December 2019 August 2022) and storm on 26-28th 2021. During periods, estimations neutral winds...
Abstract The Michelson Interferometer for Global High‐Resolution Thermospheric Imaging (MIGHTI) onboard the Ionospheric Connection Explorer (ICON) mission measures neutral winds from about 88 to 310 km altitudes, which provides a good opportunity investigate vertical distribution of winds. In this study we used green line MIGHTI focus on wind reversal due large shears at transition altitude E F regions (∼120–220 km). For limitations filter during night‐time, therefore present only results...
The equatorial ionization anomaly (EIA) is one of the most important phenomena at and low latitudes, which caused by daytime eastward electric field via E×B effect. well-developed EIA dayside thought to be a quite large structure with two crests extending ±15° magnetic latitude, plasma density distributes smooth along fluxtube. However, an additional peak poleward sometimes observed from high-resolution measurements Swarm. crest only in summer hemisphere, shows...
The Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) onboard the Ionospheric Connection Explorer (ICON) mission measures neutral winds from 88 km to 310 altitudes, which provides a good opportunity investigate vertical distribution of winds, especially their shears. Based on over two years data MIGHTI/ICON, we focused wind shears at low F region (from 245 km) in this study. As green line MIGHTI works only dayside, dayside 0600 1800 local time (LT) has been...