Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation
In this paper we present analysis of current density when the Cluster spacecraft pass the nightside auroral region at about 4-5 RE from the center of Earth. The analysis is made when the inter-spacecraft separation is within 200 km, which allows all four spacecraft to be situated inside the same cur...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Korean Space Science Society
2019-03-01
|
| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | https://doi.org/10.5140/JASS.2019.36.1.1 |
| _version_ | 1827362648289705984 |
|---|---|
| author | Youra Shin Ensang Lee Jae-Jin Lee |
| author_facet | Youra Shin Ensang Lee Jae-Jin Lee |
| author_sort | Youra Shin |
| collection | DOAJ |
| description | In this paper we present analysis of current density when the Cluster spacecraft pass the nightside auroral region at about 4-5 RE from the center of Earth. The analysis is made when the inter-spacecraft separation is within 200 km, which allows all four spacecraft to be situated inside the same current sheet. On 22 February 2002, two field-aligned current (FAC) events were observed in both the southern and the northern hemispheres. The FACs were calculated with magnetic field data obtained by the four spacecraft using the Curlometer method. The scales of the FACs along the spacecraft trajectory and the magnitudes were hundreds of kilometers and tens of nA/m2, respectively, and both events were mapped to the auroral region in the ionosphere. We also examined reliability of the results with some parameters, and found that our results are adequately comparable with other studies. Nevertheless, some limitations that decrease the accuracy of current estimation exist. |
| first_indexed | 2024-03-08T07:32:19Z |
| format | Article |
| id | doaj.art-aa4ffea368f24b26a7887031f7dfb4ba |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:32:19Z |
| publishDate | 2019-03-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-aa4ffea368f24b26a7887031f7dfb4ba2024-02-02T20:12:32ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092019-03-013611910.5140/JASS.2019.36.1.1Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster ObservationYoura Shin0Ensang Lee1Jae-Jin Lee2School of Space Research, Kyung Hee University, Yongin 17104, KoreaInstitute of Natural Sciences, Kyung Hee University, Yongin 17104, KoreaKorea Astronomy and Space Science Institute, Daejeon 34055, KoreaIn this paper we present analysis of current density when the Cluster spacecraft pass the nightside auroral region at about 4-5 RE from the center of Earth. The analysis is made when the inter-spacecraft separation is within 200 km, which allows all four spacecraft to be situated inside the same current sheet. On 22 February 2002, two field-aligned current (FAC) events were observed in both the southern and the northern hemispheres. The FACs were calculated with magnetic field data obtained by the four spacecraft using the Curlometer method. The scales of the FACs along the spacecraft trajectory and the magnitudes were hundreds of kilometers and tens of nA/m2, respectively, and both events were mapped to the auroral region in the ionosphere. We also examined reliability of the results with some parameters, and found that our results are adequately comparable with other studies. Nevertheless, some limitations that decrease the accuracy of current estimation exist.https://doi.org/10.5140/JASS.2019.36.1.1Field-aligned currentthe nightside auroral regionthe Curlometer method |
| spellingShingle | Youra Shin Ensang Lee Jae-Jin Lee Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation Journal of Astronomy and Space Sciences Field-aligned current the nightside auroral region the Curlometer method |
| title | Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation |
| title_full | Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation |
| title_fullStr | Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation |
| title_full_unstemmed | Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation |
| title_short | Analysis of Field-Aligned Currents in the High-Altitude Nightside Auroral Region: Cluster Observation |
| title_sort | analysis of field aligned currents in the high altitude nightside auroral region cluster observation |
| topic | Field-aligned current the nightside auroral region the Curlometer method |
| url | https://doi.org/10.5140/JASS.2019.36.1.1 |
| work_keys_str_mv | AT yourashin analysisoffieldalignedcurrentsinthehighaltitudenightsideauroralregionclusterobservation AT ensanglee analysisoffieldalignedcurrentsinthehighaltitudenightsideauroralregionclusterobservation AT jaejinlee analysisoffieldalignedcurrentsinthehighaltitudenightsideauroralregionclusterobservation |