Comparison of three methods of measuring the atmospheric coherence length

Ann C. Slavin; Ann Laurie Wells; Robert Q. Fugate; David L. Fried; James J. Drexler

doi:10.1117/12.283887

23 September 1997 Comparison of three methods of measuring the atmospheric coherence length

Ann C. Slavin, Ann Laurie Wells, Robert Q. Fugate, David L. Fried, James J. Drexler

Proceedings Volume 3125, Propagation and Imaging through the Atmosphere; (1997) https://doi.org/10.1117/12.283887
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

In the fall of 1996, we had the opportunity to mneasure the atmospheric coherence length (Fried's r0 parameter) at the STarfire Optical Range using three instruments. Each instrument measured r0 using a different theory and technique. The first instrument, designed and built by Dr. Donald Walters of the Naval Postgraduate School, is based on measuring the MTF of the atmosphere using a stellar image on a one dimensional detector. The second instrument, designed and built by Lockheed Martin engineers at White Sands Missile Range, is based on measuring the differential motion of stellar images. The third technique in this study used short exposure star images taken through the 1.5m telescope and processed by matching the images to shrot exposure theory values of r0. All of the instruments were located at the STarfire Optical Range and data were collected during both day and night hours. This paper presents the results of these measurements and discusses the different techniques in terms of the results obtained.

Citation Download Citation

Ann C. Slavin, Ann Laurie Wells, Robert Q. Fugate, David L. Fried, and James J. Drexler "Comparison of three methods of measuring the atmospheric coherence length", Proc. SPIE 3125, Propagation and Imaging through the Atmosphere, (23 September 1997); https://doi.org/10.1117/12.283887

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