This computer generated animation shows what the instruments on board of the Cassini spacecraft will be doing during the July 14, 2005 Enceladus flyby.
The upper right panel shows Enceladus in the fields-of-view (boresights) of the cameras on Cassini. The magenta rectangles are Ultraviolet Imaging Spectrograph (UVIS) slits. The red box is the Wide Angle Camera (WAC). The white box is the Narrow Angle Camera (NAC). The red circle and small red rectangles are the fields of view of the Composite Infrared Spectrometer (CIRS) instrument.
The lower right panel displays how Enceladus looks to the "prime" instrument at the current time. The left panel tells the viewer the attitude (orientation) of the Cassini spacecraft throughout the flyby; the color of the "beam" on Enceladus tells the viewer which instrument is prime at any time. However, because all four cameras/spectrometers (NAC, UVIS, VIMS and CIRS) all generally co-aligned, all these instruments will be taking data, no matter which slit is shown in the lower right panel.
The movie starts seven and a half hours before closest-approach, with a CIRS scan that will provide temperature and composition maps of Enceladus. The Near Angle Camera will take a high-resolution global image of Enceladus.
Jut prior to closest approach, Cassini will then turn to view a star whose path will pass behind Enceladus. This will allow the instruments (particularly the UVIS, shown by the magenta slits in the left panel starting at 19:51:50) to search for evidence of a tenuous atmosphere. Next, the spacecraft turns back to Enceladus (now looking at the night side of the body) and does CIRS mapping of the night side. During this observation, Cassini rolls to keep an attitude that is good for the magnetometer. The flyby concludes with another mosaic and a UVIS crescent observation.