Zobrazeno 1 - 10
of 516
pro vyhledávání: '"Yong Ha Kim"'
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 40, Iss 3, Pp 101-111 (2023)
We conducted a statistical study of polar mesospheric summer echoes (PMSEs) in relation to magnetic local time (MLT), considering the geomagnetic conditions using the K-index (or K). Additionally, we performed a case study to examine the velocity p
Externí odkaz:
https://doaj.org/article/15be50b3f35548bbbce7e4add1aeac50
Autor:
Hosik Kam, Young‐Sil Kwak, Changsup Lee, Jeong‐Heon Kim, Junseok Hong, Yong Ha Kim, Jeong‐Han Kim
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 6, Pp n/a-n/a (2023)
Abstract From meteor radar observations typically measuring neutral winds and temperatures in the upper atmosphere, we showed that under‐dense meteor plasma trails respond to geomagnetic activity. Depending on the geomagnetic activity conditions, t
Externí odkaz:
https://doaj.org/article/f6e6f09dc25c4e8ea7a690342dd819e1
Autor:
Sunkara Eswaraiah, Kyong-Hwan Seo, Kondapalli Niranjan Kumar, Madineni Venkat Ratnam, Andrey V. Koval, Jin-Yun Jeong, Chalachew Kindie Mengist, Young-Sook Lee, Katelynn Greer, Jun-Young Hwang, Wonseok Lee, Maniyattu Pramitha, Gasthi Venkata Chalapathi, Mannem Venkatarami Reddy, Yong Ha Kim
Publikováno v:
Atmosphere, Vol 13, Iss 9, p 1475 (2022)
Processes behind Sudden Stratospheric Warming (SSW), which occurs more frequently in the northern hemispheric polar latitudes and its influence from the stratosphere to the upper atmosphere are well documented. However, physical processes associated
Externí odkaz:
https://doaj.org/article/5ac4075fd19f4d23a94332fd5dc87737
Publikováno v:
Remote Sensing, Vol 14, Iss 17, p 4313 (2022)
Five floor-fractured craters (FFCs), Lavoisier crater and four craters surrounding it (Lavoisier C, Lavoisier E, Lavoisier F, and Lavoisier H), are distributed along the boundary between the northwestern part of the Oceanus Procellarum and the highla
Externí odkaz:
https://doaj.org/article/83546e9089fb4e78bb939d2271d77f5a
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 35, Iss 4, Pp 235-242 (2018)
A Fabry-Perot interferometer (FPI) for mesospheric observations was installed at King Sejong Station (62.2°S, 58.9°W) in Antarctica in 2017. For the initial validation of the FPI measurements, we compare neutral wind data recorded with the FPI wi
Externí odkaz:
https://doaj.org/article/dd34da9c13994c59bcef7a4a8c95cf1b
Autor:
Hyuck-Jin Kwon, Changsup Lee, Geonhwa Jee, Young-Bae Ham, Jeong-Han Kim, Yong Ha Kim, Khan-Hyuk Kim, Qian Wu, Terence Bullett6,, Suyeon Oh, Young-Sil Kwak
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 35, Iss 3, Pp 185-193 (2018)
Jang Bogo Station (JBS), the second Korean Antarctic research station, was established in Terra Nova Bay, Antarctica (74.62°S 164.22°E) in February 2014 in order to expand the Korea Polar Research Institute (KOPRI) research capabilities. One of th
Externí odkaz:
https://doaj.org/article/67f1e0714cfe43ef844cdb2d4b87afbd
Autor:
Yong Ha Kim, Ki-nam Kim
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 35, Iss 3, Pp 143-149 (2018)
The ionosphere has been monitored by ionosondes for over five decades since the 1960s in Korea. An ionosonde typically produces an ionogram that displays radio echoes in the frequency-range plane. The trace of echoes in the plane can be read either
Externí odkaz:
https://doaj.org/article/1e9016f0ca9c4be1ba57471e0944f050
Publikováno v:
Earth, Planets and Space, Vol 69, Iss 1, Pp 1-8 (2017)
Abstract We have investigated the coupling between the stratosphere and mesosphere–lower thermosphere (MLT) in the Southern Hemisphere (SH) during 2010 minor sudden stratospheric warmings (SSWs). Three episodic SSWs were noticed in 2010. Mesospheri
Externí odkaz:
https://doaj.org/article/77cc9fbd5e044f109ec1818f5075145d
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 34, Iss 2, Pp 119-125 (2017)
We retrieved rotational temperatures from emission lines of the OH airglow (8-3) band in the sky spectra of the Sloan digital sky survey (SDSS) for the period 2000-2014, as part of the astronomical observation project conducted at the Apache Point
Externí odkaz:
https://doaj.org/article/3690ccbf7635463fb9c824d37c292749
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 34, Iss 1, Pp 7-17 (2017)
In South Korea, there are about 80 Global Positioning System (GPS) monitoring stations providing total electron content (TEC) every 10 min, which can be accessed through Korea Astronomy and Space Science Institute (KASI) for scientific use. We appl
Externí odkaz:
https://doaj.org/article/f641d8a5e94344d0b83259e378c33ea9