Reply To The Comment Of Robert E. Grimm And David E. Stillman On'subsurface Water Detection On Mars By Astronauts Using A Seismicrnrefraction Method: Tests During A Manned Mars Simulation'

摘要

As stated in Pletser et al. [1], "The goal of the [... ] experiment was [... ] to demonstrate the feasibility of conducting a seismic experiment in extreme conditions", focusing on the technical aspects of EVA activities.rnIt was not the goal of the authors to demonstrate or even evaluate the analytic performances of seismic profiling methods for the search of Martian subsurface reservoirs. Papers on this subject have been published since many years (e.g., [2]) and much better references can be found in the literature for readers focusing on these geophysical aspects, e.g., JGR special issue devoted to Water in the Martian subsurface [3] or on the complementarities of EM and seismic methods for the search of subsurface water (e.g., [4]). Apollo active seismic experiments have also been conducted on the Moon [5,6] down to the crust [7] and illustrate the penetration performances in dry shallow subsurfaces, as it might be the case for the Martian shallow subsurface, but also the limitations of active seismic methods due to scattering and 3D subsurface structures.