About SBIB - Dione

Cassini ISS raw and calibrated .IMG files were downloaded from the Ring-Moon Systems Node with OPUS.
Images were restricted to a maximum Body Center resolution of 7.5 km/pix.
The Dione data were sorted into the following for easier access: ultra_high_res, high_res, regional_map, geodesy, global_color, wispy_streaks, limb_topo, zero_phase, low_phase, high_phase, crescent, spectrophotometry, eclipse, plume_search, mutual_event, movie.

Data Download

Highlight the data you would like to download, click 'Download'. Notes for the download screen: 'raw' and 'calibrated' buttons refer to the fits files. For downloading e.g. jpg files in camera view, click on 'jpg'; for projected view, click on 'Projected' and then again on 'jpg'. Note that the file names are the same for the camera and projected view.

Map Projection and ArcGIS

Data can be imported into ArcGIS by downloading the ISIS Map cubes. NOTE that wecalibrated the downloaded raw .IMG files with cisscal version 3.9.1 before creating the ISIS cubes and other file formats. The downloaded calibrated data were processed with cisscal version 3.8 by the Ring-Moon Systems Node.
Most images (PNG and thumbnails) were generated with an equirectangular projection. Images that are near the poles have been projected with a polar projection.

Maps

We use several different overview maps for the Image Browser.

Equatorial
Equatorial Color
North Polar Region
South Polar Region

The most obvious feature on the color map is the difference in color and brightness between the two hemispheres. The darker colors on the trailing hemispheres are thought to be due to alteration by magnetospheric particles and radiation striking those surfaces. The lighter-colored leading hemisphere is coated with icy dust from Saturn's E-ring, formed from tiny particles ejected from Enceladus' south pole. These satellites are all being painted by material erupted by neighboring Enceladus. For more details, click here.

Data processing

We used the USGS software tool Integrated Software for Imagers and Spectrometers (ISIS) as the main tool to process the data. We used the pre-Dawn shape model posted at USGS and the ISIS software routines to convert images into map-based projections.

Coordinates

The files list the coordinates in East Longitude. However, the base map is shown in West Longitude with the prime meridian in the middle of the map as it is commonly diplsayed for the Saturnian Satellites.
The orientation of the map projected images in the pre-view window is consistent with the footprint orientation on the base map while the camera view might be rotated compared to the base map depending on the orientation of the spacecraft at the time. However, the location is always correct.