Y
Young-Sil Kwak
Researcher at Korea Astronomy and Space Science Institute
Publications - 106
Citations - 865
Young-Sil Kwak is an academic researcher from Korea Astronomy and Space Science Institute. The author has contributed to research in topics: Ionosphere & Thermosphere. The author has an hindex of 12, co-authored 92 publications receiving 587 citations. Previous affiliations of Young-Sil Kwak include Korea University of Science and Technology & Korea University.
Papers
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The winter anomaly in the middle‐latitude F region during the solar minimum period observed by the Constellation Observing System for Meteorology, Ionosphere, and Climate
TL;DR: In this paper, the authors investigate the altitude, local time, latitude, longitude, and hemispheric variations of the electron density in the middle-latitude ionosphere by analyzing the COSMIC data measured in 2007 during a magnetically quiet period (Kp ≤ 3).
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O and N2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI
TL;DR: In this paper, the authors examined the separate roles of [O] and [N2] in modifying the F region in a geomagnetic storm by analyzing far ultraviolet images made by Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (TIMED)/Global Ultraviolet Imager (GUVI).
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Low‐mid latitude D region ionospheric perturbations associated with 22 July 2009 total solar eclipse: Wave‐like signatures inferred from VLF observations
Ajeet K. Maurya,D. V. Phanikumar,Rajesh Singh,Sushil Kumar,Bhaskara Veenadhari,Young-Sil Kwak,Abhikesh Kumar,Abhay Kumar Singh,K. Niranjan Kumar +8 more
TL;DR: In this article, the authors reported on the periodic wave-like signatures (WLS) in the D region ionosphere during the 22 July 2009 total solar eclipse using very low frequency (VLF) signal observations at stations, Allahabad, Varanasi and Nainital in Indian Sector, Busan in Korea, and Suva in Fiji.
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Comparison of the bubble and blob distributions during the solar minimum
TL;DR: In this paper, the authors investigated the causal linkage between bubbles and blobs using their occurrence statistics during the solar minimum and concluded that bubbles are not a prerequisite for the creation of blobs.
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Day-to-day variability of equatorial anomaly in GPS-TEC during low solar activity period
Malini Aggarwal,H. P. Joshi,K. N. Iyer,Young-Sil Kwak,Jae-Joon Lee,H. Chandra,Kyung-Suk Cho,Kyung-Suk Cho,Kyung-Suk Cho +8 more
TL;DR: In this article, the ionospheric total electron content (TEC) in the northern hemispheric equatorial ionization anomaly (EIA) crest region was investigated by using dual-frequency signals of the Global Positioning System (GPS) acquired from Rajkot (Geog. Lat. 14.21°N, Geom. Long.