Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1
In this study, we investigated the effect of space plasmas on the floating potential variation of a low-altitude, polar-orbiting satellite using the Langmuir Probe (LP) measurement onboard the STSAT-1 spacecraft. We focused on small potential drops, for which the estimation of plasma density and t...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2014-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2014/v31n4/OJOOBS_2014_v31n4_311.pdf |
| _version_ | 1797334233392349184 |
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| author | Junhyun Lee Ensang Lee Jaejin Lee Khan-Hyuk Kim Jongho Seon Dong-Hun Lee Ho Jin Eung-Hyun Kim Hyun-Jin Jeon Seong-Bin Lim Taeyoun Kim Jaewoong Jang Kyung-Duk Jang Kwangsun Ryu |
| author_facet | Junhyun Lee Ensang Lee Jaejin Lee Khan-Hyuk Kim Jongho Seon Dong-Hun Lee Ho Jin Eung-Hyun Kim Hyun-Jin Jeon Seong-Bin Lim Taeyoun Kim Jaewoong Jang Kyung-Duk Jang Kwangsun Ryu |
| author_sort | Junhyun Lee |
| collection | DOAJ |
| description | In this study, we investigated the effect of space plasmas on the floating potential variation of a low-altitude, polar-orbiting
satellite using the Langmuir Probe (LP) measurement onboard the STSAT-1 spacecraft. We focused on small potential drops,
for which the estimation of plasma density and temperature from LP is available. The floating potential varied according
to the variations of plasma density and temperature, similar to the previously reported observations. Most of the potential
drops occurred around the nightside auroral region. However, unlike the previous studies where large potential drops were
observed with the precipitation of auroral electrons, the potential drops occurred before or after the precipitation of auroral
electrons. Statistical analysis shows that the potential drops have good correlation with the temperature increase of cold
electrons, which suggests the small potential drops be mainly controlled by the cold ionospheric plasmas. |
| first_indexed | 2024-03-08T08:16:48Z |
| format | Article |
| id | doaj.art-dac39719a14948888204eb68f1b0f5e9 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T08:16:48Z |
| publishDate | 2014-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-dac39719a14948888204eb68f1b0f5e92024-02-02T07:20:24ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092014-12-0131431131510.5140/JASS.2014.31.4.311Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1Junhyun Lee0Ensang Lee1Jaejin Lee2Khan-Hyuk Kim3Jongho Seon4Dong-Hun Lee5Ho Jin6Eung-Hyun Kim7Hyun-Jin Jeon8Seong-Bin Lim9Taeyoun Kim10Jaewoong Jang11Kyung-Duk Jang12Kwangsun Ryu13School of Space Research, Kyung Hee University, Yongin, 446-701, KoreaSchool of Space Research, Kyung Hee University, Yongin, 446-701, KoreaKorea Astronomy and Space Science Institute, Daejeon, 305-348, KoreaSchool of Space Research, Kyung Hee University, Yongin, 446-701, KoreaSchool of Space Research, Kyung Hee University, Yongin, 446-701, KoreaSchool of Space Research, Kyung Hee University, Yongin, 446-701, KoreaSchool of Space Research, Kyung Hee University, Yongin, 446-701, KoreaKorea Aerospace Research Institute, Daejeon, 305-806, KoreaKorea Aerospace Research Institute, Daejeon, 305-806, KoreaKorea Aerospace Research Institute, Daejeon, 305-806, KoreaKorea Aerospace Research Institute, Daejeon, 305-806, KoreaKorea Aerospace Research Institute, Daejeon, 305-806, KoreaKorea Aerospace Research Institute, Daejeon, 305-806, KoreaSatellite Technology Research Center, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, KoreaIn this study, we investigated the effect of space plasmas on the floating potential variation of a low-altitude, polar-orbiting satellite using the Langmuir Probe (LP) measurement onboard the STSAT-1 spacecraft. We focused on small potential drops, for which the estimation of plasma density and temperature from LP is available. The floating potential varied according to the variations of plasma density and temperature, similar to the previously reported observations. Most of the potential drops occurred around the nightside auroral region. However, unlike the previous studies where large potential drops were observed with the precipitation of auroral electrons, the potential drops occurred before or after the precipitation of auroral electrons. Statistical analysis shows that the potential drops have good correlation with the temperature increase of cold electrons, which suggests the small potential drops be mainly controlled by the cold ionospheric plasmas.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2014/v31n4/OJOOBS_2014_v31n4_311.pdffloating potentialspace plasmasionosphereaurora |
| spellingShingle | Junhyun Lee Ensang Lee Jaejin Lee Khan-Hyuk Kim Jongho Seon Dong-Hun Lee Ho Jin Eung-Hyun Kim Hyun-Jin Jeon Seong-Bin Lim Taeyoun Kim Jaewoong Jang Kyung-Duk Jang Kwangsun Ryu Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1 Journal of Astronomy and Space Sciences floating potential space plasmas ionosphere aurora |
| title | Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1 |
| title_full | Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1 |
| title_fullStr | Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1 |
| title_full_unstemmed | Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1 |
| title_short | Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1 |
| title_sort | variation of floating potential in the topside ionosphere observed by stsat 1 |
| topic | floating potential space plasmas ionosphere aurora |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2014/v31n4/OJOOBS_2014_v31n4_311.pdf |
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