Europa terrain meshes and view factors for PTM3D, from the Bland et al. (2021) Galileo SSI SOCET SET DTMs

Five regional terrain meshes of Europa and their radiative view-factor matrices, ready for the Planetary Thermophysical Model 3D (PTM3D). They are the inputs of PTM3D's Europa terrain configurations and of the PTM3D GUI's Europa terrain card: Agenor Linea, Cilix crater, Pwyll crater, the pits and chaos near Rhadamanthys Linea, and the ridged terrain near Yelland Linea. Source and credit. The meshes are triangulations of the five SOCET SET digital terrain models (DTMs) of Bland, Michael (2022), Europa DEMs and Orthoimages in Support of Bland et al. 2021 (Remote Sensing), figshare, doi:10.6084/m9.figshare.16904632.v1 (CC BY 4.0). Those DTMs were produced by Michael T. Bland and Donna M. Galuszka at the U.S. Geological Survey Astrogeology Science Center from images acquired by NASA's Galileo Solid State Imager (SSI), with funding from NASA PDART award NNH16AC37I, and support Bland, M. T., Kirk, R. L., Galuszka, D. M., Mayer, D. P., Beyer, R. A., and Fergason, R. L. (2021), How Well Do We Know Europa's Topography? An Evaluation of the Variability in Digital Terrain Models of Europa, Remote Sensing 13(24), 5097, doi:10.3390/rs13245097. Please cite the source dataset and that paper as well as this dataset. Usage note from the source. The source products "should only be used to assess and or verify the conclusions described in Bland et al. 2021 (published in Remote Sensing), as the DTMs themselves have been superseded by updated versions that are registered to Europa's cartographic coordinate system." PTM3D uses the relief; treat results from these meshes as studies of terrains of that character, not of mapped locations. Changes from the source. Each DTM was triangulated at full resolution with PTM3D's dtm_to_ply_delaunay --body-radius 1562090 (the rasters' own sphere), and each mesh's view-factor matrix was computed with the PTM3D engine's sparse view-factor builder; PTM3D v1.1.1 rebuilds all five matrices byte-identically. DATASET_README.md and PROVENANCE.json (inside the archive; the README is also attached separately) record every step, checksum and parameter. Use. In a PTM3D checkout: python3 scripts/fetch_data.py --dataset europa-terrain, which verifies the archive's SHA-256 and unpacks it into data/external/sutton_DEMs/.