Monitoring Urban Greenhouse Gas Emissions from Space
From right to left: NASA's Orbiting Carbon Observatory-2 (OCO-2) satellite (target launch 2014) will provide nearly global coverage that periodically sees a subset of cities. The Japanese Space Agency's GOSAT satellite (launched in 2009) makes observations for a subset of cities with lower precision than OCO-2. NASA's OCO-3 payload on the International Space Station (target launch 2016) will periodically raster-scan selected cities to achieve denser spatial maps than available from GOSAT and OCO-2. Finally, the next generation of remote-sensing instruments, if deployed on 3 satellites in geostationary orbits would provide near-continuous, wall-to-wall mapping of nearly every urban area on earth.