The solar eruption of 13 May 2005: EISCAT and MERLIN observations of a coronal radio burst

We report results from EISCAT and MERLIN observations of radio scintillation during a solar eruptive event in May 2005. Anomalous increases in signal strength detected at sites more than 2000 km apart are shown to arise from the detection of a strong coronal radio burst in the distant off-axis respo...

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Bibliographic Details
Published in:Annales Geophysicae
Main Authors: Jones, R. A., Breen, A. R., Fallows, R. A., Bisi, M. M., Thomasson, P., Wannberg, G., Jordan, C. A.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2006
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article
Verlagsveröffentlichung
EISCAT
Online Access:https://doi.org/10.5194/angeo-24-2413-2006
https://noa.gwlb.de/receive/cop_mods_00033070
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00033024/angeo-24-2413-2006.pdf
https://angeo.copernicus.org/articles/24/2413/2006/angeo-24-2413-2006.pdf
Description
Summary:We report results from EISCAT and MERLIN observations of radio scintillation during a solar eruptive event in May 2005. Anomalous increases in signal strength detected at sites more than 2000 km apart are shown to arise from the detection of a strong coronal radio burst in the distant off-axis response of the MERLIN and EISCAT antennas. These observations show that EISCAT is capable of detecting the signatures of explosive events in the solar atmosphere with a high degree of time resolution. We further suggest that the highly time-structured variation in signal strength caused by distant off-axis detection of a powerful coronal radio signal could provide an explanation for previously unexplained anomalies in EISCAT IPS observations, as well as being a potential source of errors in active observations using radar codes with a completion time longer than the time-variation of the coronal signal.

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