SURVEY AND FEASIBILITY STUDY OF OPTICAL TECHNOLOGIES FOR THE L4 ENCELADUS LANDER EXPRO PLUS

ObjectivesTo perform a survey study and experimental tests of optical technologies to demonstrate the suitability of this technology for ranging and surface characterization in the frame of the L4-Enceladus mission.DescriptionOptical technologies (such as LIDAR systems) have proven their efficiency for ranging and hazard detection for terrestrial and space applications.This activity therefore aims performing a survey and feasibility study as well as experimental tests to demonstrate the suitability of optical technologies deployed onboard the ESA L4-Enceladus lander to secure the landing with the following goals:- primary task: altimeter for thelander (max altitude of 20 - 100 km TBC), with capabilities of analyzing snow surface properties at close range (10 - 100m TBC) to support the lander site selection regarding mechanical surface stability- secondary task: mapping of surface topology (e.g. surfaceinclination, obstacles such crevasses and boulders) The activity shall contain as a minimum the following tasks:1) Review of L4 needs and requirements vs existing optical technologies and devices. In particular, review existing LIDAR technologies/solutions and recent developments for Moon/Mars environments.2) Procure or build and as needed adapt suitable Optical instruments to be used as a prototype.3) Conduct performance/reliability tests in analogous to Enceladus ice and snow surfaces.Conduct test campaigns focused on snow/ice surfaces addressing the primary objectives.4) Derive a technology development roadmap for instruments adaptations to fulfill mission needs. Determine requirements for Enceladus use-case with a focus on reliability testing in relevant Enceladus Lander environment to further raise the TRL.