MODIS中尺度影像光譜儀

Moderate Resolution Imaging Spectroradiometer

MODIS (or Moderate Resolution Imaging Spectroradiometer) is a key
instrument aboard the 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
are viewing the entire Earth's surface every 1 to 2 days, acquiring
data in 36 spectral bands, or groups of wavelengths (see MODIS
Technical Specifications). These data will improve our understanding
of global dynamics and processes occurring on the land, in the oceans,
and in the lower atmosphere. MODIS is playing a vital role in the
development of validated, global, interactive Earth system models able
to predict global change accurately enough to assist policy makers in
making sound decisions concerning the protection of our environment.

from http://modis.gsfc.nasa.gov/about/