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Paper: Numerical Processing of Sunspot Images Using the Digitised Long-term Archive of the RGO Observatory
Volume: 504, Coimbra Solar Physics Meeting: Ground-based Solar Observations in the Space Instrumentation Era
Page: 237
Authors: Tlatov, A. G.; Skorbehz, N. N.; Ershov, V. N.
Abstract: We present the results of applying our numerical algorithms for identification and parametrisation of sunspots from a long series of photographic observations made in white light during the period of time from 1918 to 1972 by the Royal Greenwich Observatory (RGO). The main purpose of this work was creating a catalogue of individual sunspot parameters, which is a step forward with respect to the previous catalogues of this kind.
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