Algorithm Theoretical Basis Documents (ATBD's) are being
developed for every EOS (Earth Observing System) instrument
product including MODIS. With ATBD's, both physical theory
and the mathematical procedures and possible assumptions are
being applied for the calculations that have to be made to
convert the radiances received by the instruments to geophysical
quantities. The geophysical quantities are then available
to the scientific community for studies of the various characteristics
of the Earth system.
(Because ATBD numbers were organized sequentially and
more than one product may be derived from one ATBD, ATBD numbering
schemes do not necessarily correspond product numbering schemes.)
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