Long Exposure Point Spread Function Estimation Adaptive Optics Loop Data: Results and Validation

Details Long Exposure Point Spread Function Estimation Adaptive Optics Loop Data: Results and Validation Long Exposure Point Spread Function Estimation Adaptive Optics Loop Data: Results and Validation

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2601m&link_type=abstract

American Astronomical Society Meeting 210, #26.01; Bulletin of the American Astronomical Society, Vol. 39, p.134

Physics

Optics

Scientific paper

Current work in Solar Physics requires high resolution observations from ground based telescopes. However, the performance of any ground based telescope is ultimately limited by optical aberrations produced by atmospheric turbulence. Adaptive Optics (AO) is a powerful tool that aims to correct these aberrations in real time considerably improving image quality.
We present a method to estimate the long exposure PSF of the AO corrected solar image using AO loop data. Wavefront sensor and mirror data produced by the AO system during normal operation contain information about uncorrected residuals aberrations that define the shape of the long exposure point spread function (PSF). The estimated long exposure PSF is used to improve image quality through post-processing techniques. Post-processed images produce more reliable quantitative measurements of physical parameters.
Results obtained by applying the method to actual solar and star observations captured at the Dunn Solar Telescope will be shown. The accuracy of the estimated PSFs is tested with observations of the star Sirius which produce a direct measurement of the system's PSF.

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