Understanding terrestrial carbon processes is a major challenge in climate science. We define the satellite system required to understand greenhouse gas biogeochemistry: our study is focused on Amazon wetland CH4
emissions. We find that future geostationary satellites will provide the CH4
measurements required to understand wetland CH4
processes. Low-earth orbit satellites will be unable to resolve wetland CH4
processes due to a low number of cloud-free CH4
measurements over the Amazon basin.