Quasi-periodic echoes observed with the Chung-Li VHF radar during the SEEK campaign

C. J. Pan, R. T. Tsunoda

研究成果: 雜誌貢獻期刊論文同行評審

28 引文 斯高帕斯(Scopus)

摘要

The 52-MHz Chung-Li VHF radar, located in Taiwan, was operated during the SEEK (Sporadic-E Experiment over Kyushu) campaign to investigate the so-called quasi-periodic (QP) echoes that occur from nighttime sporadic E (Es) layers. Highlights of this study are presented in this paper, using measurements made on August 17, 1996, to illustrate the echo characteristics. QP echoes displaying 5 to 10 minute periods were observed throughout this night. A new finding is the occurrence of QP echoes whose striations were almost vertically oriented when plotted using a height-time-intensity (HTI) format. This observation provides the first unambiguous evidence for the existence of steep spatial tilts in Es layers that are responsible for QP echoes. Other characteristics from three periods during this night are described including striations with positively sloped striations. These characteristics are discussed in light of existing models for QP echoes.

原文???core.languages.en_GB???
頁(從 - 到)1809-1812
頁數4
期刊Geophysical Research Letters
25
發行號10
DOIs
出版狀態已出版 - 1 6月 1998

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