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Found 18 entries in the Bibliography.
Showing entries from 1 through 18
2022 |
Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 Multi-instrument data from Jang Bogo Station (JBS) in Antarctica were utilized to study ionospheric responses to the 11 May 2019 moderate geomagnetic storm. These include Vertical Incident Pulsed Ionospheric Radar (VIPIR)/Dynasonde, Fabry-Perot Interferometer (FPI), GPS vertical total electron content (vTEC), and magnetometer. The VIPIR/Dynasonde observed long-lasting (\textgreater11 hr) severe depletion of the electron density in the F-region ionosphere over JBS. During the depletion interval, GPS TEC also correspondingly d ... Kwon, H.-J.; Kim, K.-H.; Jee, G.; Seon, J.; Lee, C.; Ham, Y.-B.; Hong, J.; Kim, E.; Bullett, T.; Auster, H.-U.; Magnes, W.; Kraft, S.; Published by: Space Weather Published on: YEAR: 2022   DOI: 10.1029/2022SW003054 |
2020 |
This study investigates the origin of anomalous far ultraviolet emissions observed at night at the subauroral region by the Special Sensor Ultraviolet Spectrographic Imager on board the Defense Meteorological Satellite System-F16 satellite. The global distribution of the anomalous emission is derived using the measurements of the oxygen atom 130.4-nm emission in 2017. Our results show the extension of the anomalous emission from high latitudes to middle latitudes in the Northern American-Atlantic sector during the Decembe ... Kil, Hyosub; Schaefer, Robert; Paxton, Larry; Jee, Geonhwa; Published by: Geophysical Research Letters Published on: 01/2020 YEAR: 2020   DOI: 10.1029/2019GL086383 conjugate photoelectron; far ultraviolet emission; thermosphere; remote sensing data |
Kil, Hyosub; Schaefer, Robert; Paxton, Larry; Jee, Geonhwa; Published by: Geophysical Research Letters Published on: |
2019 |
Plasma Blobs Associated With Medium-Scale Traveling Ionospheric Disturbances Plasma blobs represent plasma density enhancements with respect to ambient plasma. The formation of blobs in low and middle latitudes is understood in association with either equatorial plasma bubbles or medium-scale traveling ionospheric disturbances (MSTIDs). This study reports four blob events identified from the Swarm satellite observations in 2014. Those blobs show the conjugate property and the alignment in the northwest-southeast direction in the Northern Hemisphere and southwest-northeast direction in the Southern ... Kil, Hyosub; Paxton, Larry; Jee, Geonhwa; Nikoukar, Romina; Published by: Geophysical Research Letters Published on: 03/2019 YEAR: 2019   DOI: 10.1029/2019GL082026 |
Plasma blobs associated with medium-scale traveling ionospheric disturbances
Kil, Hyosub; Paxton, Larry; Jee, Geonhwa; Nikoukar, Romina; Published by: Geophysical Research Letters Published on: |
Daytime evolution of equatorial plasma bubbles observed by the first Republic of China satellite
Kil, Hyosub; Paxton, Larry; Lee, Woo; Jee, Geonhwa; Published by: Geophysical Research Letters Published on: |
2016 |
A case of the westward disturbance dynamo (DD) electric field, influencing the daytime equatorial and low-latitude ionosphere, during a geomagnetic storm that occurred on 28\textendash29 June 2013 is presented. The GPS total electron content (TEC) observations from a network of stations in the Indian equatorial, low and middle latitude regions along with the radio beacon TEC, ionosonde, and magnetic field observations are used to study the storm time behavior of the ionosphere. Negative ionospheric storm effects were seen ... Thampi, Smitha; Shreedevi, P.; Choudhary, R.; Pant, Tarun; Chakrabarty, D.; Sunda, S.; Mukherjee, S.; Bhardwaj, Anil; Published by: Journal of Geophysical Research: Space Physics Published on: 09/2016 YEAR: 2016   DOI: 10.1002/2016JA023037 |
The relative contributions of the composition disturbances and the disturbance electric fields in the redistribution of ionospheric plasma is investigated in detail by taking the case of a long-duration positive ionospheric storm that occurred during 18\textendash21 February 2014. GPS total electron content (TEC) data from the Indian Antarctic station, Bharti (69.4\textdegreeS, 76.2\textdegreeE geographic), the northern midlatitude station Hanle (32.8\textdegreeN, 78.9\textdegreeE geographic), northern low-latitude statio ... Shreedevi, P.; Thampi, Smitha; Chakrabarty, D.; Choudhary, R.; Pant, Tarun; Bhardwaj, Anil; Mukherjee, S.; Published by: Journal of Geophysical Research: Space Physics Published on: 02/2016 YEAR: 2016   DOI: 10.1002/2015JA021841 Geomagnetic storms; High latitude low latitude coupling; Ionosphere; positive ionospheric storm |
Kil, Hyosub; Lee, Woo; Paxton, Larry; Hairston, Marc; Jee, Geonhwa; Published by: Journal of Geophysical Research: Space Physics Published on: |
2015 |
Dynamics of the Dayside Aurora as Viewed from the South Pole
McEwen, Donald; Sivjee, Gulamabas; Zhang, Yongliang; Published by: Published on: |
2014 |
A study on ionospheric scintillation near the EIA crest in relation to equatorial electrodynamics Equatorial electrojet (EEJ) data, which are considered as a proxy index of equatorial electric field, are analyzed in conjunction with equatorial ionosonde, total electron content (TEC) and scintillation data near the equatorial ionization anomaly (EIA) crest for the equinoctial months of high solar activity years (2011\textendash2012) to identify any precursor index of postsunset evolution of equatorial electron density irregularities and subsequent occurrence of scintillation near the northern EIA crest. Only geomagneti ... Chatterjee, S.; Chakraborty, S.; Veenadhari, B.; Banola, S.; Published by: Journal of Geophysical Research: Space Physics Published on: 02/2014 YEAR: 2014   DOI: 10.1002/2013JA019466 |
2012 |
Park, Jaeheung; Lühra, Hermann; Jakowski, Norbert; Gerzen, Tatjana; Kil, Hyosub; Jee, Geonhwa; Xiong, Chao; Min, Kyoung; Noja, Max; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-05-2012 YEAR: 2012   DOI: 10.1016/j.jastp.2012.03.009 |
A steep plasma density gradient has been observed in the middle-latitude F region during large geomagnetic storms. This phenomenon can be understood as a special form of the middle-latitude ionization trough (hereafter trough), but its causal linkage has not yet been clarified. We investigate the association of the steep density gradient and the trough by comparing their morphologies and occurrence locations using the satellite and ground observation data during the 11\textendash12 April 2001 storm. Steep density ... Park, S.; Kim, K.-H.; Kil, H.; Jee, G.; Lee, D.-H.; Goldstein, J.; Published by: Journal of Geophysical Research Published on: 05/2012 YEAR: 2012   DOI: 10.1029/2011JA017349 |
2010 |
Published by: Published on: |
Extreme Enhancements in GPS TEC on 8 and 10 November 2004
Chung, Jong-Kyun; Jee, Gun-Hwa; Kim, Eo-Jin; Kim, Yong-Ha; Cho, Jung-Ho; Published by: Bulletin of the Korean Space Science Society Published on: |
2008 |
Kim, E; Jee, Geonhwa; Kim, Yong; Published by: Published on: |
2007 |
First terrestrial soft X-ray auroral observation by the Chandra X-ray Observatory
Bhardwaj, Anil; Gladstone, Randall; Elsner, Ronald; Ostgaard, Nikolai; Waite, Hunter; Cravens, Thomas; Chang, Shen-Wu; Majeed, Tariq; Metzger, Albert; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-02-2007 YEAR: 2007   DOI: 10.1016/j.jastp.2006.07.011 |
2002 |
Morrison, D; Sivjee, A; Paxton, L; Zhang, Y; Wolven, B; Kil, H; Meng, C; Christensen, A; Published by: Published on: |
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