Observation of a coronal hole at 85 GHz
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M. R. Kundu; Sou-Yang Liu
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Article
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1976
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Springer
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English
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A coronal hole was observed at 85 GHz(3.5 mm-h) on November 24, 1970, when a spectacular coronal hole was observed in soft X-rays by AS&E. The miUimeter counterpart of the hole is much weaker and less widespread than in X-rays. The brightness temperature inside the hole was in most places about 100-