VHF radar and MF/HF dynasonde observations during Polar Mesosphere Summer Echoes conditions at EISCAT
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- Liu Jann-Yenq
- Institute of Space Science, National Central University Center for Space and Remote Sensing Research, National Central University
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- Pan Chen-Jeih
- Institute of Space Science, National Central University
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- Lee Chien-Chih
- Institute of Space Science, National Central University
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The EISCAT VHF radar (224 MHz) and the EISCAT dynasonde (1-10 MHz) were operated simultaneously during a Polar Mesosphere Summer Echoes (PMSE) event on 22 June 1994. We investigate the echo characteristics revealed by these two instruments. The antenna of the VHF radar was set 10° off-zenith to the north for both transmission and receiving, while the dynasonde was operated with vertical beam to record ionograms every 3 minutes. The Height-Time-Intensity (HTI) variation of the VHF radar PMSE is studied, which is characterized layered structures. The intensity profiles are quite intermittent which show similarity to those data recorded by the dynasonde. To study the ionospheric condition with the dynasonde, the quantities of signal-to-noise ratio, echo frequency, echo polarization, echolocation, and Doppler velocity are investigated. Variations in the quantities demonstrate that during the PMSE conditions, echoes of the dynasonde are mainly attributed by reflection of many small irregularities within the observed ionospheric volume.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 54 (6), 691-698, 2002
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681488690176
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- NII論文ID
- 10008698538
- 130003956307
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 6191036
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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