JunoPerijove 34: Update Ganymede 3D-control network and new DEMs study

During the Juno Perijove 34 the JunoCam acquired four RGB images of Ganymede. These images and updated SPICE kernel for spacecraft's trajectories were used to refine previous 3D-control point network (CPN). As a result, 4954 control points were measured 22,098 times with a minimum of 2 and a maximum of 16 observations per point, based on the 302 best available images from all missions (Voyagers, Galileo and Juno). After adjustment more than 86% of points have accuracy better than 3 km (>97% - better than 5 km). A new libration value for Ganymede 18ʺ is obtained. This updated CPN was used for compiling a new Ganymede global mosaic to support the planning of observations within the JUICE mission. New detailed local DEMs were obtained by stereovectorization for Enki Catena and Tros crater regions. In the Enki chain, the ratio d/D of the depth of craters to their diameter ranges from 0.049 to 0.089 and correlates with the area types (dark or light). •New Ganymede 3D-control network of 4954 points is based on 302 best images from Voyagers, Galileo and Juno and new SPICE kernels Jacobson (2021b).•A libration value of 18ʺ for Ganymede is obtained that is in good agreement with the data by Rambaux et al. (2011).•The new CPN allowed us to improve the Ganymede mosaic.•New DEM for Enki Catena shows that the ratio d/D ranges from 0.049 to 0.089 and correlates with the area type (dark or light).