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Proceedings Paper

The comparison of two methods of measuring atmospheric coherent length
Author(s): Ningquan Weng; Ruizhong Rao; Liming Xiao; Gang Sun
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Paper Abstract

The atmospheric coherent length is an important parameter when study the influence of atmosphere to the light propagation. Two kinds of methods are often used to measure the coherent length. One method uses the optical technique, measure the arrive angle of star objects, another method uses the balloon born thermal-meters, which can get profile of structure constants of refractive index, and then the coherent length can be calculated from the integral of structure constants of refractive index. Because the time scale and space scale are different in these two methods, the results of them are different although the magnitude of results is near. In this paper, a new way to compare the results of two methods above is advised. It is based on the characters of the structure constants of refractive index, and the profile data of balloon born instrument. Not only the average coherent length can be gained, and also the distribution of coherent length can be estimated. So the results of two methods can be compared quite well. The characters of coherent length are also discussed in this paper.

Paper Details

Date Published: 12 May 2005
PDF: 8 pages
Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); doi: 10.1117/12.619519
Show Author Affiliations
Ningquan Weng, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Ruizhong Rao, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Liming Xiao, Anhui Institute of Optics and Fine Mechanics, CAS (China)
Gang Sun, Anhui Institute of Optics and Fine Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 5832:
Optical Technologies for Atmospheric, Ocean, and Environmental Studies
Daren Lu; Gennadii G. Matvienko, Editor(s)

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