Physics – Optics
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9426528b&link_type=abstract
Presented at the North Atlantic Treaty Organization/Advanced Study Inst. (NATO/ASI) Conference on Adaptive Optics for Astronomy,
Physics
Optics
Atmospheric Models, Atmospheric Turbulence, Infrared Interferometers, Kolmogorov Theory, Refractivity, Turbulence Effects, Wind Velocity, Atmospheric Circulation, Earth Atmosphere, Mathematical Models, Signal Distortion
Scientific paper
Questions still exist concerning the appropriate model for turbulence-induced phase fluctuations seen in ground-based telescopes. Bester et al. used a particular observable (slope of the Allan variance) with an infrared interferometer in an attempt to distinguish models. That observable was calculated for Kolmogorov and 'random walk' models with a variety of outer scales and altitude-dependent turbulence and wind velocity. It was found that clear distinction between models requires good data on the vertical distribution of wind and turbulence. Furthermore, measurements at time separations of order 60 s are necessary to distinguish the 'random walk' model from the Kolmogorov model.
Bradford Lawrence William
Flatte Stanley M.
Max Claire Ellen
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