Monitoring Urban Greenhouse Gas Emissions from Space
From right to left: NASA's Orbiting Carbon Observatory-2 (OCO-2) satellite provides nearly global coverage that periodically samples the CO2 over a subset of cities. The Japanese Space Agency's GOSAT satellite makes observations for a subset of cities with coarser resolution than OCO-2. NASA's OCO-3 payload on the International Space Station (status TBD) includes a "city-mode" that would have the ability to map most of the world's cities and power plants on a regular basis. Finally, the next generation of remote-sensing instruments, if deployed on 3 satellites in geostationary orbits would provide near-continuous, complete mapping of nearly every urban area on earth.