Estimation Of Seeing Quality Using Low-Resolution Solar Image Data

Details Estimation Of Seeing Quality Using Low-Resolution Solar Image Data Estimation Of Seeing Quality Using Low-Resolution Solar Image Data

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..185...15b&link_type=abstract

Solar Physics, v. 185, Issue 1, p. 15-34 (1999).

Physics

2

Scientific paper

Modulation transfer functions (MTFs), generated as a by-product of the analysis of low-resolution solar images taken for the Global Oscillation Network Group, were used to estimate the quality of seeing at its six sites. These MTFs, after approximate correction for the effects of the instrumental point spread function, were fitted with physically-motived functional forms representing the effects of seeing and scattering. It was found that the estimates of seeing quality were relatively robust to the effects of scattering, but were severely biased by effects caused by changes in instrumental focus. Relative trends in seeing quality are preserved on time scales shorter than a few months and it is found that local topography dominates the observed trends in daytime seeing quality.

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