Post-hoc Derivation of MDI Flat Fields

Details Post-hoc Derivation of MDI Flat Fields Post-hoc Derivation of MDI Flat Fields

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..416..239p&link_type=abstract

Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21 ASP Conference Series, Vol. 416, proceedings

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a new method for deriving flat fields for high resolution MDI continuum data, using analysis of existing continuum and magnetogram data sets. This method allows us to reduce the residual flat field error on level 1.5/1.8 data by around a factor of 10, enough to significantly change the results from motion tracking and feature recognition algorithms. One significant advantage of this method is that it can be done retrospectively using archived data, without requiring any special satellite operations.

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