Thirty-five years of patrol measurements of the intensity of the corona outside eclipses

Details Thirty-five years of patrol measurements of the intensity of the corona outside eclipses Thirty-five years of patrol measurements of the intensity of the corona outside eclipses

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...84...77r&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 84, April 1983, p. 77-81. In French.

Physics

3

Coronal Holes, Solar Activity, Solar Corona, Astronomical Observatories, Solar Activity Effects, Solar Cycles

Scientific paper

A review of the various observatories having done daily measurements of the activity of the solar corona and having regularly published their results is being given hereby. Out of eleven observatories having taken out to the observation campaign since 1947, only six are still working in this field. Due to the fact that the scales, the focus and photometric systems are not always the same, the measurements are not homogeneous and directly comparable. However, astronomers can find there a great lot of statistical data covering thirty five years of coronal activity, that is more than three solar cycles. Some of these data, such as those of the Pic-du-Midi observatory, are readily available on magnetic tapes and may be asked from the authors. One of the most interesting exploitations of these data is the search of coronal holes (other than polar holes which are simply the signature of the periodic activity of corona) and it is shown here that such features are easily detectable. So, it will be vital for future research in solar physics, and especially in solar weather and climate relationships (bearing in mind that coronal holes are the sources of high speed streamers of the solar wind which interacts with the Earth magnetosphere), to ensure continuity and quality of patrol ground-based corona intensities outside eclipses. A number of recent conclusions of symposia in this field have led to such recommendations, and it would be suitable if next specialized commissions of IAU meetings were to think about that matter.

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