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Page 12
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10.
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Monitor the solar extreme ultraviolet spectral irradiance
(at wavelengths less than 120 nm) for sufficiently long periods to
fully assess the long term variations.
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11.
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Monitor globally over long periods the basic structure of
the lower thermosphere and upper mesosphere so as to properly
define the present structure and its response to solar forcing.
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12.
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Conduct observational and modeling studies to understand
the chemical, dynamical, radiative and electrical coupling of the
upper atmosphere to the middle and lower atmospheres.
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