NASA's Cassini spacecraft flew by Titan for the 13th time Sunday and trained its powerful synthetic aperture radar on a mid-section swath of Saturn's giant moon that mission controllers have named Xanadu.

The swath shown in light green in this image represents the target area for the spacecraft's instrument

The spacecraft collected the far left radar swath last Oct. 28. The swath on the top right is from the first Titan flyby, on Oct. 26, 2004. The second from the top is from the second radar pass, on Feb. 15, 2005, and the bottom right swath is from Cassini's flyby last Sept. 7.

So far, Cassini's radar has revealed a variety of geologic features on Titan, including impact craters, wind-blown deposits, channels and cryovolcanic features.