Thermospheric densities derived from spacecraft orbits: Accurate processing of two-line element sets

Details Thermospheric densities derived from spacecraft orbits: Accurate processing of two-line element sets Thermospheric densities derived from spacecraft orbits: Accurate processing of two-line element sets

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11003301p&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue A3, CiteID A03301

Statistics

Computation

12

Atmospheric Composition And Structure: Thermosphere: Composition And Chemistry, Atmospheric Composition And Structure: Pressure, Density, And Temperature, Atmospheric Composition And Structure: Instruments And Techniques, Geodesy And Gravity: Satellite Geodesy: Technical Issues (6994, 7969)

Scientific paper

This paper presents a new, fast, and accurate method for retrieving the total mass density of the upper atmosphere from routinely compiled trajectories of objects in low Earth orbit. Comparison to density values from state-of-the-art precision orbit determination calculations on routine tracking observations shows our results to be of comparable accuracy at vastly lower computational and administrative costs, a result both unprecedented and unforeseen. This means that the difficulty of obtaining raw observational data and precision orbit determination software is no longer an obstacle to the scientific analysis of orbits. The accessibility of orbital elements and the speed and accuracy of the new method enable the use of a vast and growing archive of global data for analysis of thermospheric evolution and responses to solar, and possibly geomagnetic, forcing. The new procedure defines precisely the effective density values that may be extracted from orbit data; these values are explicitly independent of any atmospheric model. The discussion also contrasts the new approach with past analytic methods and with standard precision orbit techniques.

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