Detailed characterization of the Martian circulation patterns, boundary layer phenomena, and climatological cycles requires simultaneous in situ meteorological measurements from networks of stations on the Martian surface.[1] The fact that both meteorology in particular and climatology in general vary both temporally and spatially means that the most effective means of monitoring these is to make simultaneous measurements at multiple locations and over a sufficiently long period of time. Mars MetNet includes both a global-scale, multi-point network of surface probes supplemented by a supporting satellite in orbit, for a projected duration of two Martian years.