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Glossary:Satellite observations
Satellite observations are of particular use for methane emissions because of their high observation density and global coverage. Classification of satellite observations can be divided into two categories: area flux mappers or point source imagers.[1]
- Area flux mappers are designed to observe total emissions on global or regional scales with 0.1 – 10 km pixel sizes. Point source imagers are fine-pixel (<60 m) instruments designed to quantify individual sources by imaging the plumes.
- Point source imagers have much finer spatial resolution than area flux mappers but lower precision. (Jacob et al 2022)
Some of the companies that employed these two categories of technologies are:
- Area Flux Mappers – GOSAT, TROPOMI, GOSAT-GW, MethaneSAT, Sentinel-5, GoeCurb, CO@M, MERLIN.
- Point source imagers – LandSat-8, Worldview-3, Sentinel -2, GHGSat, PRISMA, EnMap, EMIT, Carbon Mapper