By Maquet-80 on 2022-10-01 UT
Attached is a set of cylindrical maps of Europa at 60 pixels per degree, north to the right, encoding is gamma=1 with respect to the square-root of radiometric values.
Radiometric factors are set in a way that the PJ44 TDI 1 RGB Jupiter images are globally white-balanced.
No illumination-adjustment was applied.
The images have been taken during PJ45.
The attachement can be considered to be in the public domain.
Note that the maps are large and might challenge your computer or your software.
Image credit: NASA / JPL / SwRI / MSSS / Gerald Eichstädt
Further items of this thread may refine maps, observations and interpretations of Europa that existed prior to Juno's PJ45.
- europa_maps_pj45_ge20221001.zip [146.97 MB]
This ZIP file contains the full-size figures for the PJ45 Europa report. --John.
Here is a report on the images of Europa (including the composite map previously posted), with small-size figures. Full-size figures will follow in a separate Comment. --John.
This is a labelled copy of the composite cylindrical map. The general texture of ridges and bands and chaos regions is ubiquitous on Europa, but much of this area has not previously been imaged so well. Impact features are rare: this map shows one large one (Callanish, which was viewed at high resolution by the Galileo orbiter), and possibly a small one (Midir, not yet viewed at hi-res). White arrows indicate features that Paul Schenk and colleagues have argued may be signs of global stresses due to polar wander (global rotation of the crust), so this image adds significantly to that discussion. --John Rogers.
Here is a composite of Gerald's cylindrical maps, with lat/long scales, reduced to 30 px/deg.
One interesting feature is Corrick [Corick?] Linea, which is a bright band crossing the terminator at ~20 deg.N. Paul Schenk in his Atlas of the Galilean Satellites suggests this is an antipodeal twin of the great Agenor Linea, but I don't think there has been any hi-res view of it up to now. It has a curious form, and runs across a chaos region, but it is much narrower than Agenor Linea.