Computer Science
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997icar..129..120n&link_type=abstract
Icarus, Volume 129, Issue 1, pp. 120-126.
Computer Science
5
Scientific paper
To aid the more complete and precise utilization of Earth-Mars radar range data, filtering techniques are developed which reduce the effects of asteroid belt correlated noise, which now degrades such data. Because of the dynamical regularities in asteroid belt motion, there is a corresponding regularity in the belt's total perturbation of a planet's orbit. A correlated structure for this disturbance can therefore be derived without knowing details of the actual asteroid distribution. These correlations are exploited by either of two procedures: (1) forming new observables from linear combinations of range measurements which are immune to such systematic errors, or (2) developing a correlated error matrix for the range observables which then modifies the weighting matrix used in the optimum least-squares-fit of the data. The existing Earth-Mars range data set produced as part of the Viking mission can be used to test the ability of these filtering procedures to reduce both bias in parameter estimation and the size of the data's postfit residuals.
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