The influence of image motion upon measurements of solar velocity fields

Details The influence of image motion upon measurements of solar velocity fields The influence of image motion upon measurements of solar velocity fields

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...197..345g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 197, no. 1-2, May 1988, p. 345, 346.

Astronomy and Astrophysics

Astrophysics

4

Atmospheric Effects, Fabry-Perot Interferometers, Image Motion Compensation, Light Beams, Solar Velocity, Velocity Distribution, Atmospheric Turbulence, Birefringent Filters, Doppler Effect, Spectral Bands

Scientific paper

In this paper the authors want to call observers' attention to the fact that atmospheric instabilities are able to distort, through both image motion and the angle-of-arrival variation of incident light beams, the signal that carries information on solar velocity fields. This effect manifests itself in a modulation of the instrument spectral response and eventually leads to Doppler-velocity signal fluctuations which are indistinguishable from true ones. Crude quantitative estimates are made of such errors inherent in birefringent filters and Fabry-Perot interferometers.

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