Cosine of output polar angles in increasing order, starting with
negative (downwelling radiance, looking upward) values (if any) and on through
positive (upwelling radiance, looking downward) values.
Must not be zero.
umu values
Cosine of output polar angles in increasing order, starting with
negative (downwelling radiance, looking upward) values (if any) and on through
positive (upwelling radiance, looking downward) values.
Must not be zero.
umu values