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Least squares inversion of Stokes profiles in the presence of velocity gradientsThe Auer, Heasley and House Stokes inversion procedure in use at High Altitude Observatory is based on the analytic solution of the equation of transfer for polarized light where the representation of the thermodynamic and magnetic structure of the atmosphere is assumed to have a high degree of invariance, namely, a Milne-Eddington (ME) structure with a constant magnetic field. In the presence of invariance breaking gradients the resultant Stokes profiles are represented only approximately, if at all, by analytic forms. The accuracy of the inversion parameters and their significance as measures of actual structure are explored for the ME and the Landman-Finn sunspot models under the effects of velocity gradients. The resulting field parameters are good to a few percent and prove to be insensitive to the errors committed by the use of a ME-representation, but the resulting ME parameters yield a less precise measure of thermal structure.
Document ID
19850021580
Document Type
Conference Paper
Authors
Skumanich, A. (National Center for Atmospheric Research Boulder, CO, United States)
Rees, D. E. (Sydney Univ. Sunspot, N. Mex., United States)
Lites, B. W. (Sacramento Peak Observatory)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: NASA. Marshall Space Flight Center Meas. of Solar Vector Magnetic Fields
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF AST-78-17292
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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