Physics – Optics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988spie..926..319e&link_type=abstract
IN: Optical, infrared, and millimeter wave propagation engineering; Proceedings of the Meeting, Orlando, FL, Apr. 5-7, 1988 (A89
Physics
Optics
2
Atmospheric Optics, Image Processing, Image Resolution, Modulation Transfer Function, Telescopes, Astronomical Observatories, Charge Coupled Devices
Scientific paper
Two techniques for determining atmospheric 'seeing' conditions are compared in terms of theoretical and experimental results. The techniques are: a method evaluating the modulation transfer function (MTF) of the atmosphere by measuring the line spread function of a star image and a method measuring the angle of arrival through two relatively small apertures. The system measuring angle-of-arrival fluctuations in this study is the Atmospheric Turbulence Measuremet and Observation System (ATMOS). It is shown that the ATMOS system, utilizing a differential angle-of-arrival approach, provides a practical way to obtain accurate field measurements of Fried's parameter. The MTF approach is shown to incorporate several uncertainties such as incorrect focus and vibration effects.
Drexler James J.
Eaton Frank D.
Hines John R.
Peterson William A.
Waldie Arthur H.
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