Free Access

Fig. 15


Relative error in NSB calculation with our method (c–d) and the method by Worden et al. (1998a, for two images of subset 6 with the lowest level of inhomogeneities (density images shown on a–b). The facular pattern was derived from the Rome/PSPT observations taken on 21/08/2000 (left) and 09/08/2008 (right). Also given (below the images) are the values of the rms, mean, mean absolute and maximum relative differences within the disc up to 0.98 R. The colour bars apply to the images below them.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.