We thank John Snow for helpful discussions, and anonymous reviewers for constructive comments. We thank Chris Fairall for providing the SCOPE data, and Will Drennan for providing the SWADE data. This research was primarily supported by the National Aeronautics and Space Administration under Grant NAG8-836, with partial support from the National Science Foundation under Grant ATM-9200534. Both grants were issued to Dr. Dayton Vincent at Purdue University. COAPS receives it base funding from the Secretary of Navy Grant from ONR to James J. O'Brien. Current funding for MAB is from the NASA JPL NSCAT and OVWST Projects.
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