Open Access

Figure 4

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Histogram of the occurrence number of events (blue bars), and the occurrence ratio (light-blue line) as a function of the solar zenith angle. The red-colored numbers indicate the number of passes in each 10° bin.

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.