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These measurements could be accommodated on the dedicated solar
monitoring spacecraft identified in Recommendation 1.
11. Monitor globally over long periods the basic
structure of thelower thermosphere and upper mesosphere so as to
properly define the presentstructure and its response to solar
12. Conduct observational and modeling studies to
understand thechemical, dynamical, radiative and electrical
coupling of the upperatmosphere to the middle and lower
Analysis of solar soft X-ray forcing of nitric oxide levels,
with possible inferences for nitrate deposits in ice cores, is an
example of such a study. Ultimately, a global model of the Earth
system is needed.