Raditladi SPC Regional DTM and Photometric Cube Data

We provide two categories of data for a portion of Raditladi crater, all generated with the Stereophotoclinometry (SPC) software suite. These include high-resolution regional topographic models and photometric data derived from the models. Three partially overlapping regional Digital Terrain Models (DTM) are provided to give high-resolution topography for the northeastern peak-ring of Raditladi crater. Using select images found within the regional models, four files in ISIS-cube format were generated; I/F (reflectance), Local Phase Angle, Local Emission Angle, and Local Incidence Angle. Each photometric cube pixel represents the value at each vertex of the regional DTM, thus each pixel location in each cube represents the same location on the surface. The final data are provided in two formats. To aid the data user, filenames end with a letter to designate the format. These letters are “c” and “g”. "c" - ISIS - The native cube format for the United States Geological Survey (USGS) Integrated Software for Imagers and Spectrometers. "g" - GeoTIFF format, an expanded version of TIFF images that maintains physical geometric information, which is especially useful by GIS programs like ArcGIS and GRASS. The regional models are provided in cube and geoTIFF format (“c” and “g”) and the photometric data is provided in cube format (“c”). Details about the products are given in Raditladi_product_description.pdf. Thumbnails of the topography and albedo are in PNG format. The models were constructed using the MESSENGER Mercury Dual Imaging System (MDIS) images from the PDS Cartography and Imaging Sciences Node. Approximately 30% of the WAC images used filter G, which has a similar center wavelength to the NAC instrument that has no filter. No filter B (i.e. broadband or clear) images were used to generate the products in this bundle, but all the other filters between A and L were used. Raw unprocessed images are used, but a correction for geometric distortion and a frame transfer smear are applied by SPC. 8 bit images are converted to 16 bit images using a Look Up Table provided by the MESSENGER team. The image list for each DTM, as well as the kernel list, are included as text documents. All three DTMs have a Ground Sample Distance (GSD) of 20 m that cover an area of 17 x 17 km, and are near 27.6 Lat, 120.3 E Lon. In general, the uncertainties for these models follows the 1 to 2 times the GSD rule, but in the northern most DTM the uncertainty may reach as much as 5 times the GSD. These rules are described in Raditladi_product_description.pdf. Data used in the research article: Domingue, D. Weirich, J., Rodriguez, A. and 5 colleagues. (2025). Evolution of Mercury’s Volatile-Bearing Crust within Raditladi Basin. Submitted to the Planetary Science Journal.