Statistics – Methodology
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003p%26ss...51..415g&link_type=abstract
Planetary and Space Science, Volume 51, Issue 6, p. 415-425.
Statistics
Methodology
2
Scientific paper
Beginning in 1958 analysis of the atmospheric drag on artificial earth satellites has provided many measurements of the rotation of the earth's thermosphere.1 It was reported that there was a net west-to-east wind ranging from 50ms-1 to more than 200ms-1: the so-called superrotation. Although a number of analysts have contributed to these measurements, they have not been confirmed by theoretical models or other types of measurements, which have found (a) more complex wind structures and (b) much smaller speed.
This paper discusses the satellite drag measurements and methodology, pointing out possible sources of systematic error, including discussion of a simulation. Finally, yet another set of data is presented, benefitting from the insights gained during the last 40 years. The main result of this analysis suggests a mean superrotation of 2%(Λ=1.026+/-0.01). The larger published values of /Λ are assumed to result from subtle unmodelled systematic errors in the earlier data analysis, or indicate that superrotation was larger in the 1960s and 1970s than it was in the 1980s. Progress on this question should include reanalysis of some of the earlier data.
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