An animation of HRSC images taken 10 November 2005, as the shadow of Phobos moves on the surface of Mars. The HRSC has nine line sensors, which cover the surface one after the other due to the movement of the orbiter over the surface.
While the first and forward-looking channel images the ground, the shadow of Phobos is still outside the imaged area (first image in the sequence). Then the HRSC covers the field of view subsequently with the green channel, the panchromatic nadir channel, and the blue channel (second to fourth images in sequence).
The complete imaging time for all channels is only a few minutes. By the time the last channel, another backward-looking panchromatic channel, observes the 41 km-wide field on the ground, the shadow has left the imaged area again.