Yes, people, the fourth data release is in! 3 ISS DVDs, also VIMS, RADAR, UVIS releases are available at the PDS site.

admitedly, not as much interesting stuff in this release. One close Titan pass (T5), a Mimas non-targeted flyby in Rev06, the Tiger stripes sequence in Rev08, the Titan non-targeted encounter in Rev09 with the Ontario Lacus pics, and a Hyperion non-targeted encounter (yes, those images are still over-exposed, sorry). Okay, I guess there is quite a bit. But not as much as last time (two Enceladus encounters, a RADAR sar swath, first good sub-Saturnian hemisphere Titan images), or next time (south polar Enceladus close pass, two Titan encounters (with short T7 radar swath), the Tethys close encounter, the Hyperion close encounter, and the best Mimas encounter).

A word of warning with Titan pics, CALIBRATE!!! Even then, you may have to do additional artifact removal. One recommended sequence is the Rev09 images. Far enough away that you should be able to get away without having to remove any additional artifacts after running the images through cisscal or some cisscal source-code derived calibration tool.

Here are some released images from this PDS period:

Land o' lakes: http://ciclops.org/view.php?id=1161
Clouds in the Distance: http://ciclops.org/view.php?id=1162
Northern Fensal mosaic: http://ciclops.org/view.php?id=1040
Coats Facula: http://ciclops.org/view.php?id=1043
Jumbled terrain in eastern Quivira: http://ciclops.org/view.php?id=1045
Encountering Hyperion: http://ciclops.org/view.php?id=1192

here are some interesting VIMS views:

First up, v1492367246_3.jpg, shows the central portion of Fensal on Titan. The view is centered near 5 North, 45 West. An number of faculae are visible in this view at 2.03 microns. The view is stretched North-south so that the resolution is ~5 km/pixel in the north-south direction (north is approximately up in this view) and ~10 km/pixel east-west. You can see some interesting variations in brightness in the dark material in this view.

Actually, depending on interest there are lots of interesting ISS images in this release, for example:

* Ring movies showing disturbances caused by passing satellites
* Mimas, Enceladus, Dione, Rhea and Hyperion nontargeted imaging
* Fairly good images of small bodies like Janus
* Nontargeted Titan images
* Zero-phase ring images showing the opposition highlight
* Spectacular images showing the rings bent by refraction where they disappear behind Saturn's limb
* -Lots- of various ring images in addition to the ones mentioned above

I just updated my table of what I have found interesting in the collection of Cassini ISS PDS images. I have now taken a look at every Cassini ISS image released to the PDS, including the recently released images, images obtained during cruise and the Jupiter flyby images. The updated list can be seen here:

http://www.mmedia.is/bjj/misc/css_stuff/im...s_overview.html

If anyone notices any errors or something that should obviously be included I'd like to know. Also there must be some typos .

Nice summary of the PDS nodes for different types of Cassini data at http://gsa.confex.com/gsa/2005AM/finalprog...tract_96653.htm