MODIS (Moderate Resolution Imaging Spectroradiometer) is a key instrument aboard NASA’s Terra (EOS AM) and Aqua (EOS PM) satellites.
Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning,
while Aqua passes south to north over the equator in the afternoon. Terra MODIS and Aqua MODIS view the entire Earth's surface every 1 to 2 days,
acquiring data in 36 spectral bands (or groups of wavelengths) from 705km above the earth’s surface.

Created by: Paul Illsley