First observations of the artificial modulation of polar mesospheric winter echoes

A. J. Kavanagh, F. Honary, M. T. Rietveld, A. Senior

doi:10.1029/2006gl027565

First observations of the artificial modulation of polar mesospheric winter echoes

DOI Web Site Web Site 被引用文献4件

A. J. Kavanagh

Department of Communication Systems Lancaster University UK
F. Honary

Department of Communication Systems Lancaster University UK
M. T. Rietveld

European Incoherent Scatter Scientific Association Ramfjordmoen Norway
A. Senior

Department of Communication Systems Lancaster University UK

書誌事項

公開日: 2006-10

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/2006gl027565

公開者: American Geophysical Union (AGU)

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説明

<jats:p>We demonstrate for the first time that the application of ionospheric heating can affect the strength of polar mesospheric winter echoes (PMWE) detected by VHF radar. PMWE were observed between 61.8 and 68.5 km altitude and we show that the signal strength can be modulated with 10‐second and 1‐minute cycles. The structures that cause PMWE are shown to extend over several hundred meters (∼300 m) with echoes existing in two height regimes simultaneously and a descent in altitude indicative of gravity wave effects. The effect on PMWE of ionospheric heating has similar gross features to those for PMSE: a sharp decrease in power when HF heating is switched on followed by a sharp increase when heating is switched off. During the period of active heating there is some recovery in echo power suggestive of dust control of the PMWE.</jats:p>