# Presentation: 182097

## PDS Rings Node

- FY04 Status Summary
- September 9, 2004
- Mark R. Showalter
- Mitchell K. Gordon

## Cassini Support (1)Voyager ISS Derived Profiles (Unplanned)

- Users requested the finest-resolution (~ 2 km) ring profiles from Voyager images.
- Lit side and dark side.
- Needed for comparison to Cassini SOI data at finest resolution ever to be obtained.
- Preliminary data set VG_2810 delivered just in time for SOI. Should enter peer review by end of FY.

- Lit Side

- Unlit Side

- New Cassini Image

## Cassini Support (2)Archive Planning

**Plan**: Continued participation in the SAWG.
**Accomplishments**:
- We participated in every SAWG telecon.
*We carried out extensive discussions with RSS and CIRS teams.*
*A site visit in August worked out final details of the RSS SIS for derived ring occultation data. Based on our Voyager RSS volume design.*
*We supported Cassini programmers who continue to have problems with software designed to target Saturn’s F Ring. (FINALLY solved this week!)*
**Status**: On track, despite substantial unanticipated work.

**G**

## Voyager Ring Occultation Data

**Plan**: Completion of the UVS data set by end of FY.
**Plan**: Completion of the RSS derived data set by end of FY.
**Accomplishments**:
- Both data sets were distributed for peer review at the end of December, on schedule.
*We recovered and archived additional UVS occultation files that had been forgotten since the early 1980’s. *
*We provided supplemental geometry files at the request of users.*
**Status**: Generally on track, despite unanticipated work and a six-month delay in the peer review.
- UVS: To be delivered by end of FY.
- RSS: To be delivered by end of FY unless open peer review issues cannot be resolved in a timely manner.

**G**

**Y**

## Voyager IRIS Extended Data Archive

**Plan**: Obtain, interpret and deliver a Saturn IRIS data set to users by end of FY.  This would extend the data set beyond the few days around closest approach, which was previously archived by the Atmospheres Node.
**Accomplishments**:
- We have obtained the data and appropriate documentation.
- We have discussed the data set with the IRIS team.
- Our analysis of the data is under way, although questions remain about how to interpret some of the binary files.
**Status**: On track, with delivery expected by the end of the FY.

**G**

## Voyager IRIS Geometry Catalog

**Plan**: Create an on-line search engine for IRIS ring data by end of FY, provided a valid C kernel becomes available.
**Accomplishments**:
- A software tool for generating the IRIS metadata has been written and tested.
*We are nearing completion of a comparative study of the SEDRs from ISS, UVS and PPS teams. This is a necessary precursor to preparing a usable C kernel. *
**Status**:
*We have made considerable progress in our unanticipated attempt to generate the C kernel ourselves, using various Voyager SEDRs. Either a usable C kernel or a report on failed attempts at reconstruction will be delivered early in the next FY.*
- Since the C kernel was a required input, this task could not be completed this year.
- IRIS work will resume if/when a C kernel is generated and validated.

**Y**

## Saturn Ring Plane Crossing Data

**Plan**: Deliver the data set from the William Herschel Telescope (WHT)
**Accomplishments**:
- The WHT data set was completed and delivered in April.
*A data set from the Infrared Telescope Facility (IRTF) is in pre-peer review at the Central Node. It should be ready for peer review by the end of the calendar year.*
*We recovered pointing information that was preventing us form archiving adaptive optics data from the Canada-France-Hawaii Telescope.*
**Status**: Substantially **ahead** of original plan.

**G**

## Saturn Astrometry Data

**Plan**: Deliver a data set of satellite astrometry obtained from the Hubble Space Telescope by end of FY.
**Accomplishments**:
- The volume was distributed for peer review in November 2003.
**Status**:
- Project delayed by one missing peer review.
- We anticipate delivery by the end of the FY, assuming receipt of the last remaining peer review.

**G**

## Earth-Based Ring Occultation Data

**Plan**: Deliver a data set from the stellar occultation of  28 Sgr by Saturn’s rings by end of FY
**Accomplishments**:
- We distributed the data for peer review in October 2003.
**Status**:
- Delayed a few months by a very tardy peer review.
- To be delivered by the end of the calendar year.

**Y**

## On-line Catalogs (1)

**HST WFPC2 Catalog**
**Plan**: Annual update to our on-line catalog.
**Status**: Completed.
**Voyager ISS Catalog**
**Plan**: Update our database based on the final volume.
**Status**: Incomplete. The final volume was just delivered by the Imaging Node; database update is now in progress but completion by end of FY is uncertain.

**G**

**Y**

## On-line Catalogs (2)

**PDS-D Product Server Integration**
**Plan**: Prototype a version of one of our on-line catalogs to return data via the PDS Product Server.
**Status**: On track for completion by the end of the FY. Preliminary version is working.
**Cassini Metadata Tools**
**Plan**: Develop tools to generate geometric metadata for data from Cassini instruments.
**Status**: No progress. Urgency eliminated by decision not to include such metadata in Cassini data labels. Task deferred to FY05 as part of our major new push in catalog development.
**We have identified a team of mathematicians/SPICE experts whom we will contract to develop many of our metadata generation and “geometry engine” tools.**

**G**

**Y**

## On-line Ephemeris Tools

**G**

**Plan**: Complete our annual update based on requests by users.
**Accomplishments**:
- Our graphical tools now generate a preview thumbnail image and offer downloads in PDF and JPEG formats in addition to Postscript.
- Brand new tools are on line to support the New Horizons and Cassini encounters with Jupiter.
- Ring orientation parameters are now returned for all eccentric or inclined rings.
- All our tools now use the latest Cassini ephemeris.
**Status**:
- Our updates and enhancements are more extensive than usual this year.
- Almost every new feature was based on user requests.

## Additional User Services

*We implemented a “Comment on this Page” feature on most of our web pages.*
*We updated our distributable toolkits with improved documentation and support for additional platforms.*
*We revamped and reorganized our major web pages in support of the user tests. This update includes new “meta tags” to better help our Google search engine find the most appropriate pages.*
*We integrated our software toolkits into the CN’s new software web site.*
*We integrated all our on-line data holdings and search engines into PDS-D.*
*We developed a much more secure method for installing and running the PDS Product Server.*