On the feasibility of measuring methane on Mars using 3.3 um lidar from space

We investigate the feasibility of measuring methane on Mars using a satellite based lidar at 3.3 um which has the advantage over passive instruments in being able to measure methane at night. Line selection, power requirements, signal to noise, and other details are discussed. Comparisons with other technologies are made. Previous measurements are discussed and the possible advantages of measurements that Lidar can obtain are presented. Subterranean life and other processes are investigated as a possible origin of methane on Mars. Comparisons of similar subterranean life on earth are used as a model for possible subterranean life on Mars and elsewhere.