Atmospheric extinction coefficients in the ${\mathrm{I}}_{\mathrm{c}}$ band for several major international observatories: Results from the BiSON telescopes, 1984 to 2016

S. J. Hale, W. J. Chaplin, G. R. Davies +7

Over 30 years of solar data have been acquired by the Birmingham Solar Oscillations Network (BiSON), an international network of telescopes used to study oscillations of the Sun. F…