Free Access

Fig. 1


The orbit and phases as seen by the observer. The inclination is set to 60°. The phases shown here are numbered from 1 to 12 and correspond to the phases presented in Figs. 3 to 5.

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.