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The most recent JOA ( JOA Vo l12 No 2 P 03 to 08 ) has a paper titled Estimating the Eclipse Solar Radius
from Flash Spectrum Videos . The authors are Luca Quaglia · Sydney, New South Wales · Australia · besselianelements@gmail.com
John Irwin · Guildford, England · United Kingdom · john@jir1667.plus.com
Konstantinos Emmanouilidis · Thessaloniki · Greece · conemmil@gmail.com
Alessandro Pessi · Milan · Italy · issepela@gmail.com . The Journal can be downloaded free from https://www.iota-es.de/joafree.html.
Should be of interest to grating spectroscopists using video and attending a total or annular solar eclipse.That’s an impressive amount of information they were able to extract from the video. I recorded a flash spectrum video using a webcam during the 2006 eclipse and was happy to get anything, even if, as it turned out, it was poorly focussed
http://www.threehillsobservatory.co.uk/astro/spectra_27.htmCheers
Robin
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