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Monthly numbers of (a) calculated property groups and (b) processed NRT SHARP timestamps between 14 September 2012 and 30 January 2019. Property group numbers are shown at highest (1-h; orange bars) and at lowest (24-h; blue bars) cadence. The shaded interval between 13 April 2016 and 8 September 2017 corresponds to a period of questionable quality for the HMI NRT SHARP data (see text for details). Histograms represent a total of 32,098 processed SHARP timestamps, leading to millions of predictor values, since each timestamp could potentially provide up to 209 predictors.
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