152 citations · 726 across the 17 of their papers we have counts for
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astro-ph.SR2012★ 72 cited
Long-Term Measurements of Sunspot Magnetic Tilt Angles
Jing Li, Roger K. Ulrich
Tilt angles of close to 30,600 sunspots are determined using Mount Wilson daily averaged magnetograms taken from 1974 to 2012, and MDI/SoHO magnetograms taken from 1996 to 2010. Wi…
astro-ph.IM2012★ 7 cited
The non-linearity between <ln A> and <Xmax> induced by the acceptance of fluorescence telescopes
R. Ulrich, L. Cazon
The measurement of the average depth of the shower maximum is the most commonly used observable for the possible inference of the primary cosmic-ray mass composition. Currently, di…