Remeasurement of Solar Observing Optical Network sunspot areas

The United States Air Force solar observing optical network (SOON) sunspot areas have been reported by several researchers over many years to be underestimated by as much as 50 per cent. Here, the areas of sunspots from scanned SOON disc drawings have been accurately remeasured for a period of two m...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 2020-09, Vol.497 (1), p.1110-1114
1. Verfasser:	Meadows, P J
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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