Results 21 to 30 of about 84 (42)

Observing System Impact on Ionospheric Specification Over China Using EnKF Assimilation

Space Weather, Volume 18, Issue 10, October 2020., 2020
Abstract Accurate ionospheric specification for the current and future is one of the key tasks in operational space weather. In this work, we have assessed the effect of a dense ground network consisting of different radio instruments either developed or under developing on ionosphere nowcasting and forecasting over China and adjacent region (0–60°N ...
Jianhui He, Xinan Yue, Lianhuan Hu, Junyi Wang, Mingyuan Li, Baiqi Ning, Weixing Wan, Jiyao Xu   +7 more
wiley   +1 more source

An Abrupt Decrease in Electron Temperature Inside the Ionospheric Density Holes During the Launches of Carrier Rockets

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Previous observations have demonstrated that rocket exhaust can trigger ionospheric electron density holes and cause electron temperature enhancements during launches. Using high‐precision measurements from the Sanya incoherent scatter radar, we discovered a previously overlooked decrease in electron temperature.
Linxuan Zhao, Feng Ding, Xinan Yue, Yihui Cai, Junyi Wang, Xiaolin Li, Su Xu, Xu Zhou, Ning Zhang, Mingyuan Li, Yonghui Wang   +10 more
wiley   +1 more source

Direct Observational Evidence of the Mesoscale Gravity Wave Modulations on Low‐Latitude Sporadic E Layer

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Sporadic E (Es) layer plays essential role in ionosphere‐atmosphere coupling. Theoretical simulations show that the atmospheric gravity waves (GWs) in the lower thermosphere are the main modulatory source on Es dynamics at small spatial scales and short periods.
Junyi Wang, Xinan Yue, Xu Zhou, Yihui Cai, Feng Ding, Jorge L. Chau, David C. Fritts, Juha Vierinen, Alan Z. Liu, Baiqi Ning   +9 more
wiley   +1 more source

Direct Kelvin‐Helmholtz Instability Detection at the Ionospheric E Region Electron Density

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract New high‐resolution measurements by Sanya incoherent scatter radar (ISR) employing a wide‐bandwidth chirp signal now enable spatiotemporal resolutions of 37.5 m and 50 s. We have applied these new capabilities for observations of Kelvin‐Helmholtz instability (KHI) dynamics in the low‐latitude ionosphere E region.
Junyi Wang, Xinan Yue, Yihui Cai, Feng Ding, Xu Zhou, Jorge L. Chau, David C. Fritts, Juha Vierinen, Alan Z. Liu   +8 more
wiley   +1 more source

Direct Observations of Large‐Scale Wave Structure and Post‐Sunset Rise of the Ionosphere in the Generation of Equatorial Spread F

Geophysical Research Letters
Large‐scale wave structure (LSWS) and the post‐sunset rise (PSSR) are two key factors in the generation of equatorial spread F (ESF). In this study, we reported continuous and direct observations of LSWS and PSSR and their effects on seeding ESF by Sanya
Qi Jiang, Jiuhou Lei, Xinan Yue, Fuqing Huang, Rong Xia, Tong Dang, Xiaoli Luan   +6 more
doaj   +1 more source

Direct Evidence of the Lower Atmosphere Perturbations Producing Abnormal Ionospheric Longitudinal Gradients During Quiescent Geomagnetic Conditions

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract An unusual case of a large ionospheric longitudinal gradient in East Asia on 11 May 2021 occurred during a geomagnetically‐quiet period. It shows the largest east‐west difference in electron density at Yamagawa and Wuhan stations when Kp < 2 for 13:00–17:00 LT in 2021.
Yuyan Jin, Biqiang Zhao, Xu Zhou, Honglian Hao, Guozhu Li, Xinan Yue, Zishen Li   +6 more
wiley   +1 more source

The First Moon Bistatic SAR Imaging Experiment Based on FAST Radio Telescope

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This article presents the first bistatic synthetic aperture radar (SAR) Moon imaging experiment based on the five-100-m aperture spherical radio telescope (FAST) and the Sanya incoherent scatter radar (SYISR).
Yan Yin, Jinghai Sun, Jitong Duan, Xiaochen Wang, Mingyuan Li, Xinan Yue, Lijia Huang, Peng Jiang, Chibiao Ding   +8 more
doaj   +1 more source

Vertical Structural Evolution of Ionospheric Holes Triggered by Rocket Launches Observed by the Sanya Incoherent Scatter Radar

Journal of Geophysical Research: Space Physics, Volume 129, Issue 12, December 2024.
Abstract This article presents observational results of the vertical structural evolution of ionospheric holes during two rocket launches. A combination of observations from the newly built Sanya incoherent scatter radar (SYISR) and Global Navigation Satellite System networks was employed.
Linxuan Zhao, Feng Ding, Xinan Yue, Su Xu, Junyi Wang, Yihui Cai, Mingyuan Li, Ning Zhang, Xu Zhou, Yonghui Wang, Jianyong Li, Tian Mao, Qian Song, Bo Xiong, Xiaolin Li, Junhao Luo   +15 more
wiley   +1 more source

A New Method for Reconstruction of Regional Three‐Dimensional Electron Density Distributions Using AI‐Based Data Assimilation Method and Incoherent Scatter Radar Measurements

Geophysical Research Letters, Volume 51, Issue 22, 28 November 2024.
Abstract The ionosphere's dynamic structure affects electromagnetic radiation by altering radio wave propagation, impacting daily communications. The characteristics of the ionosphere are primarily characterized by electron density parameters. This paper proposes a method to construct Three‐Dimensional (3‐D) electron density distributions with ...
Chenghao Li, Hanxian Fang, Xiaoqun Cao, Die Duan, Chao Xiao, Hongtao Huang, Ganming Ren, Yang Lin, Yihui Cai   +8 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