Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere
Non-specular, vertically upward transit, fast-moving radar echoes are observed in the summer polar upper mesosphere near 90 km using 52 MHz VHF radar at Esrange, Sweden. By resolving maximum echo power movement, the unusual meteor trails propagate vertically upward with taking horizontal displacem...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Korean Space Science Society
2018-06-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2018/v35n2/OJOOBS_2018_v35n2_93.pdf |
| _version_ | 1797329389276364800 |
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| author | Young-Sook Lee Sheila Kirkwood Young-Sil Kwak |
| author_facet | Young-Sook Lee Sheila Kirkwood Young-Sil Kwak |
| author_sort | Young-Sook Lee |
| collection | DOAJ |
| description | Non-specular, vertically upward transit, fast-moving radar echoes are observed in the summer polar upper mesosphere near
90 km using 52 MHz VHF radar at Esrange, Sweden. By resolving maximum echo power movement, the unusual meteor trails
propagate vertically upward with taking horizontal displacements at an initial speed of 10 km/s exponentially decreasing with
increasing height from 85-89 km, lasting for 3.5 sec. Another upward transit is observed as following a downward transit echo
target in about ~1 sec, lasting over 5 sec. The upward motion cannot be explained with the dynamics of penetrating meteors
or by atmospheric dynamics. The observation proposes that secondary produced plasma jets occurring from meteor trail
are possibly responsible for upward fast moving echoes. The long-lasting (3-5 sec), ascending meteor trails at speeds of a few
10^4 m/s are distinctive from any previous occurrences of meteors or upper atmospheric electrical discharges in the aspect of
long-lasting upward/downward motions. This result possibly suggests a new type of meteor-trail leader discharge occurring in
the summer polar upper mesosphere and lower thermosphere. |
| first_indexed | 2024-03-08T07:03:58Z |
| format | Article |
| id | doaj.art-aeb57f09cea84b1fbaa30567315d1f97 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:03:58Z |
| publishDate | 2018-06-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-aeb57f09cea84b1fbaa30567315d1f972024-02-03T05:06:58ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092018-06-013529310310.5140/JASS.2018.35.2.93Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper MesosphereYoung-Sook Lee0Sheila Kirkwood1Young-Sil Kwak2Department of Astronomy and Space Science and Geology, Chungnam National University, Daejeon 34134, KoreaSwedish Institute of Space Physics, Kiruna 98128, SwedenKorea Astronomy and Space Science Institute, Daejeon 34055, KoreaNon-specular, vertically upward transit, fast-moving radar echoes are observed in the summer polar upper mesosphere near 90 km using 52 MHz VHF radar at Esrange, Sweden. By resolving maximum echo power movement, the unusual meteor trails propagate vertically upward with taking horizontal displacements at an initial speed of 10 km/s exponentially decreasing with increasing height from 85-89 km, lasting for 3.5 sec. Another upward transit is observed as following a downward transit echo target in about ~1 sec, lasting over 5 sec. The upward motion cannot be explained with the dynamics of penetrating meteors or by atmospheric dynamics. The observation proposes that secondary produced plasma jets occurring from meteor trail are possibly responsible for upward fast moving echoes. The long-lasting (3-5 sec), ascending meteor trails at speeds of a few 10^4 m/s are distinctive from any previous occurrences of meteors or upper atmospheric electrical discharges in the aspect of long-lasting upward/downward motions. This result possibly suggests a new type of meteor-trail leader discharge occurring in the summer polar upper mesosphere and lower thermosphere.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2018/v35n2/OJOOBS_2018_v35n2_93.pdfmeteor trailnon-specular echoupward trailleader discharge |
| spellingShingle | Young-Sook Lee Sheila Kirkwood Young-Sil Kwak Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere Journal of Astronomy and Space Sciences meteor trail non-specular echo upward trail leader discharge |
| title | Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere |
| title_full | Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere |
| title_fullStr | Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere |
| title_full_unstemmed | Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere |
| title_short | Fast, Upward, Long-Lasting, Transit Echoes as an Evidence of New-Type of Meteor-Trail Leader Discharge in the Summer Polar Upper Mesosphere |
| title_sort | fast upward long lasting transit echoes as an evidence of new type of meteor trail leader discharge in the summer polar upper mesosphere |
| topic | meteor trail non-specular echo upward trail leader discharge |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2018/v35n2/OJOOBS_2018_v35n2_93.pdf |
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