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...
Published in: | Annales Geophysicae |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2006
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Subjects: | |
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 |
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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