VHF radar and MF/HF dynasonde observations during Polar Mesosphere Summer Echoes conditions at EISCAT

Jann Yenq Liu; Chen Jeih Pan; Chien Chih Lee

doi:10.1186/BF03351720

VHF radar and MF/HF dynasonde observations during Polar Mesosphere Summer Echoes conditions at EISCAT

Jann Yenq Liu, Chen Jeih Pan, Chien Chih Lee

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

12 引文斯高帕斯（Scopus）

摘要

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.

原文	???core.languages.en_GB???
頁（從 - 到）	691-698
頁數	8
期刊	Earth, Planets and Space
卷	54
發行號	6
DOIs	https://doi.org/10.1186/BF03351720
出版狀態	已出版 - 1 8月 2002

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10.1186/BF03351720

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title = "VHF radar and MF/HF dynasonde observations during Polar Mesosphere Summer Echoes conditions at EISCAT",

abstract = "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.",

author = "Liu, {Jann Yenq} and Pan, {Chen Jeih} and Lee, {Chien Chih}",

note = "Funding Information: Acknowledgments. The EISCAT Scientific Association is supported by CNRS (France), MPF (Germany), NIPR (Japan), NFR (Sweden), PPARC (U.K.), RCN (Norway), and SA (Finland). The authors would like to thank Dr. J. R{\"o}ttger at the Max-Planck-Institut f{\"u}r Aeronomie and Dr. M. T. Rietveld at the EISCAT Scientific Association, Heating Division for the useful discussion and information. This research was partially supported by National Science Council of ROC Grant NSC 85-2612-M008-005 AP5, NSC 90-2111-M-008-062-AP3 and NSC 90-2111-M-008-049-AP5 to National Central University.",

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AU - Liu, Jann Yenq

AU - Pan, Chen Jeih

AU - Lee, Chien Chih

N1 - Funding Information: Acknowledgments. The EISCAT Scientific Association is supported by CNRS (France), MPF (Germany), NIPR (Japan), NFR (Sweden), PPARC (U.K.), RCN (Norway), and SA (Finland). The authors would like to thank Dr. J. Röttger at the Max-Planck-Institut für Aeronomie and Dr. M. T. Rietveld at the EISCAT Scientific Association, Heating Division for the useful discussion and information. This research was partially supported by National Science Council of ROC Grant NSC 85-2612-M008-005 AP5, NSC 90-2111-M-008-062-AP3 and NSC 90-2111-M-008-049-AP5 to National Central University.

PY - 2002/8/1

Y1 - 2002/8/1

N2 - 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.

AB - 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.

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VHF radar and MF/HF dynasonde observations during Polar Mesosphere Summer Echoes conditions at EISCAT

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