Large Geomagnetically Induced Currents at Equator Caused by an Interplanetary Magnetic Cloud by B. Nilam, S. Tulasi Ram

“…The responsible physical mechanisms were examined through magneto‐hydrodynamic model simulations and found that a prompt penetration of strong westward‐overshielding electric fields and ionospheric currents at the equator play a dominant role. …”
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Multilayered Sporadic‐E Response to the Annular Solar Eclipse on June 21, 2020 by Jin Wang, Xiaomin Zuo, Yang‐Yi Sun, Tao Yu, Yungang Wang, Lihui Qiu, Tian Mao, XiangXiang Yan, Na Yang, Yifan qi, Jiuhou Lei, Lingfeng Sun, Biqiang Zhao

“…Abstract A moon shadow of annular solar eclipse passed through East Asia in the afternoon on June 21, 2020, which was a good opportunity to study the rapid ionospheric response to the solar radiation variations. …”
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A Generalized Oblique Projection Filter with Flexible Parameter for Interference Suppression by Yi-ming Wang, Xing-peng Mao, Hong Hong, Jie Zhang, Yu-mei Cui

“…Further, an application of GOP filter in ionospheric clutter cancellation in a high frequency surface wave radar (HFSWR) system is given. …”
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Determination of Auroral Electrodynamic Parameters From AMPERE Field‐Aligned Current Measurements by R. M. Robinson, Larry Zanetti, Brian Anderson, Sarah Vines, Jesper Gjerloev

“…The electric fields are then used with the conductances to calculate horizontal ionospheric currents. We validate the results by simulating the SuperMAG magnetic indices for 30 geomagnetically active days. …”
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A Method to Mitigate the Effects of Strong Geomagnetic Storm on GNSS Precise Point Positioning by Xiaomin Luo, Junfeng Du, Yidong Lou, Shengfeng Gu, Xinan Yue, Jingbin Liu, Biyan Chen

“…To mitigate the adverse effects of strong geomagnetic storms, we propose to establish the geometry‐free (GF) cycle slip threshold model based on ionospheric disturbance index rate of total electron content index to reduce the false detection rate of cycle slip in GNSS precise point positioning (PPP) during strong storm periods, thus improving the accuracy and reliability of GNSS PPP. …”
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A Cycle Slip Detection and Repair Method Using BDS Triple-Frequency Optimization Combination with Wavelet Denoising by Kezhao Li, Haofei Ban, Yingxiang Jiao, Shuaikang Lv

“…The dual-frequency phase ionospheric residual (PIR) method has the ability to detect sensitive small cycle slips, but its detection results have multivalue problems. …”
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GA-ARMA Model for Predicting IGS RTS Corrections by Mingyu Kim, Jeongrae Kim

“…For precise positioning, users should correct for GNSS error components such as satellite orbit and clock errors as well as ionospheric delay. The international GNSS service (IGS) real-time service (RTS) can be used to correct orbit and clock errors in real-time. …”
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The Flare Irradiance Spectral Model‐Version 2 (FISM2) by P. C. Chamberlin, F. G. Eparvier, V. Knoer, H. Leise, A. Pankratz, M. Snow, B. Templeman, E. M. B. Thiemann, D. L. Woodraska, T. N. Woods

“…FISM2 is also improved to 0.1‐nm spectral bins across the same 0‐ to 190‐nm spectral range and is already being used in research to estimate space weather changes due to solar irradiance variability in planetary thermospheres and ionospheres.…”
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Detection of GRBs and OTs by All-Sky Optical and SID Monitors by R. Hudec, M. Spurny, M. Krizek, P. Pata, R. Slosiar, M. Rerabek, M. Klima

“…The second method is the GRB detection based on their ionospheric response.…”
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Intelligent methods for natural data analysis: application to space weather by O.V. Mandrikova

“…Using the problem of detecting ionospheric anomalies as an example, the efficiency of combining threshold wavelet filtering with the NARX network is shown. …”
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A Proper Use of the Adjacent Land‐Based Observatory Magnetic Field Data to Account for the Geomagnetic Disturbances During Offshore Directional Drilling by Mikhail Kruglyakov, Alexey Kuvshinov, Manoj Nair

“…These measurements are the superposition of the signals from the internal, core and crustal, and external, ionospheric and magnetospheric sources and the noise from magnetic elements in the borehole assembly. …”
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Solar EUV‐Enhancement and Thermospheric Disturbances by C. Briand, K. Doerksen, F. Deleflie

“…The proposed physical mechanism driving the Dst changes is linked to the increased production of O+ ions of ionospheric origin, which may occur over the EUV‐enhancement period.…”
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Upper‐Atmosphere Mass Density Variations From CASSIOPE Precise Orbits by Andrés Calabia, Shuanggen Jin

“…In this study, TMD is estimated from the precise orbits of CAScade SmallSat and IOnospheric Polar Explorer (CASSIOPE) at one‐second time step, and the TMD variations following the February 2014 geomagnetic storm are investigated. …”
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Recreating the Horizontal Magnetic Field at Colaba During the Carrington Event With Geospace Simulations by Seán P. Blake, Antti Pulkkinen, Peter W. Schuck, Alex Glocer, Denny M. Oliveira, Daniel T. Welling, Robert S. Weigel, Gary Quaresima

“…The mechanism behind this has previously been attributed to magnetospheric processes, ionospheric processes or a combination of both. In this study, we outline our efforts to replicate this low‐latitude magnetic field using the Space Weather Modeling Framework. …”
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ROTI‐Based Stochastic Model to Improve GNSS Precise Point Positioning Under Severe Geomagnetic Storm Activity by Xiaomin Luo, Junfeng Du, João Francisco Galera Monico, Chao Xiong, Jingbin Liu, Xinmei Liang

“…Abstract For global navigation satellite system (GNSS), ionospheric disturbances caused by the geomagnetic storm can reduce the accuracy and reliability of precision point positioning (PPP). …”
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Global TEC Map Fusion Through a Hybrid Deep Learning Model: RFGAN by Zhou Chen, Kecheng Zhou, Haimeng Li, Jing‐song Wang, Zhihai Ouyang, Xiaohua Deng

“…For the integrity and continuity of the global observation data, deep learning can obtain a global Ionospheric total electron content (TEC) map by fusing multi‐source TEC maps. …”
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Climatological Statistics of Extreme Geomagnetic Fluctuations With Periods From 1 s to 60 min by N. C. Rogers, J. A. Wild, E. F. Eastoe, J. Hübert

“…Rates of exceedance are explained by reference to the magneto‐ionospheric processes dominant in different latitude and MLT sectors, including ULF waves, interplanetary shocks, auroral substorm currents, and traveling convection vortices. …”
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Nowcasting Solar EUV Irradiance With Photospheric Magnetic Fields and the Mg II Index by Kara L. Kniezewski, Samuel J. Schonfeld, Carl J. Henney

“…With daily global photospheric magnetic maps and Mg II index observations, this study provides an improved method of nowcasting EUV & FUV bands used to drive thermospheric and ionospheric modeling.…”
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Nighttime Geomagnetic Response to Jumps of Solar Wind Dynamic Pressure: A Possible Cause of Québec Blackout in March 1989 by T. Zhang, Y. Ebihara, T. Tanaka

“…Soon after another pair related to the main impulse (MI) appears and travels in the anti‐sunward direction. The horizontal ionospheric current associated with the MI remains strong when propagating to the nightside. …”
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Lyman‐alpha Variability During Solar Flares Over Solar Cycle 24 Using GOES‐15/EUVS‐E by Ryan O. Milligan, Hugh S. Hudson, Phillip C. Chamberlin, Iain G. Hannah, Laura A. Hayes

“…We also show that increased Lyα flux is closely correlated with induced currents in the ionospheric E‐layer through the detection of the solar flare effect as observed by the Kakioka magnetometer.…”
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