MODIS (MODerate resolution Imaging Spectrometer) flies onboard NASA's Aqua (2002-now) and Terra (2000-now) satellites. Both satellites orbit the Earth from pole to pole, seeing most of the globe every day. Onboard Terra, MODIS sees the Earth during the morning, while Aqua MODIS orbits the Earth in the afternoon. Both satellites are polar-orbiting, with Terra on a descending orbit (southward) over the equator about 10:30 local sun time, and Aqua on an ascending orbit (northward) over the equator about 13:30 local sun time. From a vantage about 700 km above the surface and a ±55° view scan, each MODIS views the Earth with a swath about 2330km, thereby observing nearly the entire globe on a daily basis, and repeat orbits every 16 days. MODIS performs measurements in the solar to thermal infrared spectrum region in 36 channels between 0.41 and 14.2μm with high spatial resolution (up to 250m at nadir, i.e., 250m, 500m, and 1000m).