| 2022 |
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Validation of in-situ ionospheric density using FORMOSAT-7/COSMIC-2 IVM and ICON IVM
We investigate the validation of in-situ ion density measurements by the ion velocity meter (IVM) onboard F7/C2 and ICON, respectively, during the solar minimum condition of
Choi, Jong-Min; Lin, Charles; Rajesh, PK; Park, Jaeheung; Kwak, Young-Sil; Chen, Shih-Ping; Lin, Jia-Ting;
Published by: Published on:
YEAR: 2022 DOI: 10.21203/rs.3.rs-1758637/v1
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Two different properties of ionospheric perturbations detected in the vicinity of the Korean Peninsula after the Hunga-Tonga volcanic eruption on 15 January 2022
Hong, Junseok; Kil, Hyosub; Lee, Woo; Kwak, Young-Sil; Choi, Byung-Kyu; Paxton, Larry;
Published by: Published on:
YEAR: 2022 DOI:
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| 2019 |
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Assimilation of Multiple Data Types to a Regional Ionosphere Model With a 3D-Var Algorithm (IDA4D)
For the purpose of building a regional (bound 20\textendash60\textdegreeN in latitude and 110\textendash160\textdegreeE in longitude) ionospheric nowcast model, we investigated the performance of IDA4D (Ionospheric Data Assimilation Four-Dimension) technique considering International Reference Ionosphere model as the background. The data utilized in assimilation were slant total electron content (STEC) from 27 ground GPS (Global Positioning System) receiver stations and NmF2 (ionospheric F2 peak density) from five ionoson ...
Mengist, Chalachew; Ssessanga, Nicholas; Jeong, Se-Heon; Kim, Jeong-Heon; Kim, Yong; Kwak, Young-Sil;
Published by: Space Weather Published on: 06/2019
YEAR: 2019 DOI: 10.1029/2019SW002159
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| 2015 |
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Morphology of the postsunset vortex in the equatorial ionospheric plasma drift
Lee, Woo; Kil, Hyosub; Kwak, Young-Sil; Paxton, Larry;
Published by: Geophysical Research Letters Published on:
YEAR: 2015 DOI:
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| 2014 |
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Investigation of the Tidal Signatures in the Thermosphere Using the TIMED/GUVI Data
Kil, Hyosub; Paxton, Larry; Zhang, Yongliang; Kwak, Young-Sil; Lee, Woo;
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YEAR: 2014 DOI:
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The role of the postsunset vortex in the creation of turbulence in the bottomside F region
Lee, Woo; Kil, Hyosub; Kwak, Young-Sil; Paxton, Larry;
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YEAR: 2014 DOI:
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The zonal motion of equatorial plasma bubbles relative to the background ionosphere
Kil, Hyosub; Lee, Woo; Kwak, Young-Sil; Zhang, Yongliang; Paxton, Larry; Milla, Marco;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2014 DOI:
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The zonal motion of equatorial plasma bubbles relative to the background ionosphere
Kil, Hyosub; Lee, Woo; Kwak, Young-Sil; Zhang, Yongliang; Paxton, Larry; Milla, Marco;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2014 DOI:
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Equatorial broad plasma depletions associated with the enhanced fountain effect
Lee, Woo; Kil, Hyosub; Kwak, Young-Sil; Paxton, Larry; Zhang, Yongliang; Galkin, Ivan; Batista, Inez;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2014 DOI:
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| 2013 |
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The Study of the origin of broad plasma depletions in the equatorial F region
Oh, S; Lee, W; Kil, H; Kwak, Y; Paxton, L; Zhang, Y;
Published by: Published on:
YEAR: 2013 DOI:
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Drivers of the hemispheric asymmetry in the low-latitude electron density distribution
Kil, H; Kwak, Y; Lee, W; Paxton, L; Zhang, Y;
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YEAR: 2013 DOI:
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Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms
Park, Yoon-Kyung; Kwak, Young-Sil; Ahn, Byung-Ho;
Published by: Journal of Astronomy and Space Sciences Published on:
YEAR: 2013 DOI:
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| 2012 |
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Day-to-day variability of equatorial anomaly in GPS-TEC during low solar activity period
Aggarwal, Malini; Joshi, H.P.; Iyer, K.N.; Kwak, Y.-S.; Lee, J.J.; Chandra, H.; Cho, K.S.;
Published by: Advances in Space Research Published on: Jan-06-2012
YEAR: 2012 DOI: 10.1016/j.asr.2012.03.005
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Persistent longitudinal features in the low-latitude ionosphere
Kil, H; Lee, WK; Kwak, Y-S; Oh, S-J; Paxton, LJ; Zhang, Y;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2012 DOI:
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| 2011 |
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O and N 2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI
Kil, H.; Kwak, Y.-S.; Paxton, L.; Meier, R.; Zhang, Y.;
Published by: Journal of Geophysical Research Published on: Jan-01-2011
YEAR: 2011 DOI: 10.1029/2010JA016227
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The source of the longitudinal asymmetry in the ionospheric tidal structure
Kil, H.; Kwak, Y.-S.; Oh, S.-J.; Talaat, E.; Paxton, L.; Zhang, Y.;
Published by: Journal of Geophysical Research Published on: Jan-01-2011
YEAR: 2011 DOI: 10.1029/2011JA016781
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Longitudinal asymmetry in the crest intensity of the ionospheric tidal structure
Kil, H; Paxton, LJ; Zhang, Y; Kwak, Y; Oh, S;
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YEAR: 2011 DOI:
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O and N2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI
Kil, H; Kwak, Y-S; Paxton, LJ; Meier, RR; Zhang, Y;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2011 DOI:
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| 2010 |
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Is DE2 the source of the ionospheric wave number 3 longitudinal structure?
Kil, H.; Paxton, L.; Lee, W.; Ren, Z.; Oh, S.-J.; Kwak, Y.-S.;
Published by: Journal of Geophysical Research Published on: Jan-01-2010
YEAR: 2010 DOI: 10.1029/2010JA015979
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On and N2 disturbances in the F region during the 20 November 2003 storm seen from TIMED/GUVI
Kil, Hyosub; Paxton, Larry; Kwak, Young-Sil; Meier, Robert; Zhang, Yongliang;
Published by: 38th COSPAR Scientific Assembly Published on:
YEAR: 2010 DOI:
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Seasonal, diurnal, and solar cycle variations of the longitudinal wave structure in the low-latitude thermosphere
Kwak, Y; Kil, H; Lee, W; Cho, K;
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YEAR: 2010 DOI:
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| 2009 |
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The Variability of the Zonal Plasma Drift in the Equatorial F Region
Kil, H; Kang, C; Oh, S; Kwak, Y; Lee, W; Paxton, LJ;
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YEAR: 2009 DOI:
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LONGITUDINAL VARIATION OF THE ANNUAL AND HEMISPHERIC ASYMMETRIES OF THE LOW-MIDDLE LATITUDE IONOSPHERE
Kwak, Y; Kil, H; Oh, S; Lee, W; Forbes, JM; Cho, K;
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YEAR: 2009 DOI:
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Reversed ionospheric convections during the November 2004 storm: Impact on the upper atmosphere
Using the Assimilative Mapping of Ionospheric Electrodynamics (AMIE) procedure, a particular period (2000–2350 UT on 9 November) in the November 2004 storm is studied. During this time interval, IMF Bz was strongly northward along with a high solar wind dynamic pressure, favorable conditions to form reversed convection in the polar region. Indeed, the AMIE outputs show strong reversed convection cells in both hemispheres for a long period (>1 h), which have rarely been observed. The impact on the thermospheric neutral wind ...
Deng, Yue; Lu, Gang; Kwak, Young-Sil; Sutton, Eric; Forbes, Jeffrey; Solomon, Stan;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2009 DOI: https://doi.org/10.1029/2008JA013793
reversed convection; November 2004 storm
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