Levenberg-Marquardt Algorithm Applied to Corotational Plasma Flow at Saturn

Details Levenberg-Marquardt Algorithm Applied to Corotational Plasma Flow at Saturn Levenberg-Marquardt Algorithm Applied to Corotational Plasma Flow at Saturn

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.1205l&link_type=abstract

American Astronomical Society, DPS meeting #42, #12.05

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Scientific paper

Plasma corotation flow around Saturn is analyzed using a non-linear, least squares fitting routine based on the Levenberg-Marquardt algorithm, tailored specifically for data from the Cassini Plasma Spectrometer (CAPS). The program assumes the plasma to consist of two species, a light group (H+) and a water group (W+) corotating at the same velocity. It is therefore designed to automatically model a one-dimensional Maxwell-Boltzmann distribution (one for each species) to a large data set and derive the corresponding densities, velocities, and temperatures using minimal computer resources for faster computation. Assumption of equal velocity for both ion species is used to infer the spacecraft potential. Preliminary results derived by the algorithm are presented for six years of CAPS data, from all longitudes, between 3-10 Saturn radii (RS) and ±10° latitude.

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