Note that the map they produce will be of surface properties (like mineral composition), not methane. The surface properties are the main intermediate product

Note that the map they produce will be of surface properties (like mineral composition), not methane. The surface properties are the main intermediate product on the way to the climate-related overall goal (https://earth.jpl.nasa.gov/emit/science/objectives/ https://earth.jpl.nasa.gov/emit/science/objectives/). Namely, does the dust lofted from these deserts heat or cool the Earth?