Results 31 to 40 of about 154 (118)

Solar activity dependence of medium-scale traveling ionospheric disturbances using GPS receivers in Japan

Earth, Planets and Space, 2021
In order to reveal solar activity dependence of the medium-scale traveling ionospheric disturbances (MSTIDs) at midlatitudes, total electron content (TEC) data obtained from a Global Positioning System (GPS) receiver network in Japan during 22 years from
Yuichi Otsuka, Atsuki Shinbori, Takuya Tsugawa, Michi Nishioka   +3 more
doaj   +1 more source

Investigation of ionospheric response to a moderate geomagnetic storm over the mid-latitude of Saudi Arabia

Open Astronomy
This study investigated the ionospheric response to a moderate geomagnetic storm recorded on May 14, 2019, with a minimum disturbance storm time (Dst) index of −70-70 nT. Observations from three Global Positioning System (GPS) stations (RFHA, 29.6∘{\text{
Alenazi Moqbil Salem, Nooreldeen Hassan Mahdy, Ahmed Ayman Mahmoud, Yossuf Mohamed, Lomotey Solomon Otoo, Yassen Ahmed, Mahrous Ayman   +6 more
doaj   +1 more source

Study on Ionospheric Depletion and Traveling Ionospheric Disturbances Induced by Rocket Launches Using Multi-Source GNSS Observations and the MRMIT Method

Remote Sensing
Rocket launches constitute a major anthropogenic source of disturbance in the near-Earth space environment, inducing significant ionospheric perturbations through both chemical and dynamic mechanisms.
Jianghe Chen, Pan Xiong, Ming Ou, Ting Zhang, Xiaoran Zhang, Yuqi Lin, Jiahao Zhu   +6 more
doaj   +1 more source

Numerical Simulation of Perkins Instability in the Midlatitude F-Region Ionosphere: The Influence of Background Ionospheric Multi-Factors

Atmosphere
A numerical simulation of Perkins instability in the midlatitude F-region ionosphere is developed in this study. The growth of nighttime plasma density perturbation excited by Perkins instability was successfully reproduced.
Yi Liu, Ting Lan, Yufeng Zhou, Yunzhou Zhu, Zhiqiang Fan, Yewen Wu, Yuqiang Zhang, Xiang Wang   +7 more
doaj   +1 more source

Medium-Scale Traveling Ionospheric Disturbances and Plasma Bubbles Observed by an All-Sky Airglow Imager at Yonaguni, Japan

Terrestrial, Atmospheric and Oceanic Sciences, 2009
We report on night time air glow imaging observations of the low latitude ionosphere by means of a 630-m all-sky imager in stalled in March 2006 at Yonaguni, Japan (24.5°N, 123.0°E; 14.6°N geomagnetic), about 100 km east of Taiwan.
Tadahiko Ogawa, Yuichi Otsuka, Kazuo Shiokawa, Takuya Tsugawa, Akinori Saito, Kazuaki Hoshinoo, Keisuke Matunaga, Minoru Kubota, Mamoru Ishii   +8 more
doaj   +1 more source

Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato

Space Weather
The ionosphere exhibits complex variations due to the influences from above and below. To distinguish the source of ionospheric disturbances is important for understanding the variation process and the coupling mechanism among different regions.
Ke Li, Donghe Zhang, Yi Zeng, Yaoyu Tian, Guofeng Dai, Zhizhao Liu, Guanglin Yang, Shuji Sun, Guozhu Li, Yongqiang Hao, Zuo Xiao   +10 more
doaj   +1 more source

Ionospheric disturbances in Japan detected by ALOS-2 subband azimuth offset

Earth, Planets and Space
Global Navigation Satellite Systems (GNSS) and synthetic aperture radar (SAR) are valuable tools for observing ionospheric disturbances. While GNSS provides continuous temporal data with limited spatial resolution, SAR offers high-resolution spatial ...
Yu Morishita, Ryu Sugimoto, Toru Kouyama, Chiaki Tsutsumi   +3 more
doaj   +1 more source

Global IsUG index maps for tracking ionospheric variability: a case study of the 4–5 November 2023 geomagnetic storm

Journal of Space Weather and Space Climate
In this study, we analyze ionospheric and thermospheric changes during a composite geomagnetic storm on 4–5 November 2023 with two activity periods. On 4 November, the corotating interaction region (CIR) compression resulted in moderate activity (SYM-H =
Smirnov Artem, Asamoah Eric Nana, Navas-Portella Víctor, Kronberg Elena A., Lühr Hermann, Liu Qi, Hernández-Pajares Manuel   +6 more
doaj   +1 more source

Estimating traveling ionospheric disturbance propagation direction and speed using bistatic high-frequency oceanographic radars

Journal of Space Weather and Space Climate
The purpose of this investigation is to demonstrate how observations from a network of Coastal Ocean Dynamics Applications Radars (CODARs) can be used to derive the parameters of a traveling ionospheric disturbance (TID) in the mid-latitudes.
Markowski Danielle G., Kaeppler Stephen R., Pepper Andrew M., Coleman Lawrence F.   +3 more
doaj   +1 more source

Regional Medium‐Scale Traveling Ionospheric Disturbance Propagation Model Based on BDS GEO Satellites

Space Weather
Accurate modeling of traveling ionospheric disturbances (TIDs) is essential for characterizing their spatiotemporal variations and mitigating their effects on Global Navigation Satellite System (GNSS) precise positioning.
Dengkui Mei, Xiaohong Zhang, Xiaodong Ren, Xuan Le, Wentao Yang, Ahmed Abdelaziz   +5 more
doaj   +1 more source