[X] My Assistant

[ugordan]

From the looks of things, 2 additional DVDs are available on the PDS, though the links aren't up yet.
They can be accessed here:
COISS_2009
COISS_2010

Data includes 2 flybys of Titan, 2 of Enceladus as well as some NTs of Rhea, Mimas, Enceladus etc.

[elakdawalla]

I'm looking into the INDEX.LBL files for these PDS releases and I have a question. Many of the labels refer to an "IOI file." For example, "TARGET_DESC" is described thusly: "The name of the intended target for which the exposure was calculated/selected in the given image. May include calibration type information. Limited to 75 characters. (Comes from the TARGET_DESC keyword in the IOI file.)" What is the IOI file and does it reside on the COISS discs somewhere?

--Emily

[pat]

I'm looking into the INDEX.LBL files for these PDS releases and I have a question.  Many of the labels refer to an "IOI file."  For example, "TARGET_DESC" is described thusly: "The name of the intended target for which the exposure was calculated/selected in the given image. May include calibration type information. Limited to 75 characters. (Comes from the TARGET_DESC keyword in the IOI file.)"  What is the IOI file and does it reside on the COISS discs somewhere?

--Emily

An IOI is an "Instrument Operations Interface" file. It is the file that the instrument team produces that actually controls the instrument for an observation e.g. for ISS, open shutter at time x, use filters y,z, exposure duration is ddd milliseconds, set gain state to sss etc (one set of instructions for each image, a single IOI can contain detailed instructions for hundreds of images). The IOI is then processed into the low level commands that are sent to the spacecraft.

The IOI file is basically the instructions for the observation. There is no requirement to archive the IOI files so they are not sent to the PDS. I've attached a basic example of the relevant section of an ioi for a single image


The IOI file contains alot of useful information, nearly all of which then goes into the image labels which are archived. What it does do is explicitly show what the observation was INTENDED to be, how many images, what spacing etc. The IOI file also contains metadata, information that never makes it into the image labels. Very often this metadata includes a very detailed description of the observation, what its intended for, why certain values were chosen etc.

[Bjorn Jonsson]

I have now taken a look at every PDS released Cassini image of the Saturn system obtained since Cassini started its regular observations of Saturn in February 2004.

This is a lot of images so to help myself remember where to find interesting stuff I created a table of what I found interesting. This (hopefully) includes all of the targeted and nontargeted satellite flybys plus what I found interesting and/or visually beautiful.

It seemed this might be useful not just for me so I decided to upload the table to my website:

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

If there are any errors in the table or if I omitted something obviously interesting I'd like to know.