Selection of Optimal Exposure Time in Changchun Area Based on Atmospheric Coherence Length Measurement Instrument

Wei Zhao; Shuai Chang; Ye Gu; Lei Zhang; Xin Zhao; Chunyu Guo; Hongyu Zhao; Wei Xu

doi:10.3788/AOS241541

Acta Optica Sinica, Volume. 45, Issue 6, 0601008(2025)

Selection of Optimal Exposure Time in Changchun Area Based on Atmospheric Coherence Length Measurement Instrument

Wei Zhao1... Shuai Chang1,3,*, Ye Gu1, Lei Zhang1, Xin Zhao1, Chunyu Guo2, Hongyu Zhao2 and Wei Xu3 |Show fewer author(s)

Author Affiliations

¹Key Discipline Laboratory of Air Ground Laser Communication for National Defense, Institute of Space Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, Jilin , China

²Henghui Optoelectronic Measurement Technology (Jilin) Co., Ltd, Changchun 130000, Jilin , China

³Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin , China

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Figures & Tables(11)

Fig. 1. Schematic diagram of experimental system

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Fig. 2. Field experimental test

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Fig. 3. Spot images and spot energy distributions. (a) Spot image collected by experimental camera; (b) spot image collected by reference camera; (c) spot energy distribution of experimental camera; (d) spot energy distribution of reference camera

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Fig. 4. Centroid horizontal axis difference curves and vertical axis difference scatter plots with confidence and prediction bands. (a) X axis; (b) Y axis

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Fig. 5. Comparison of data of 1‒9 ms exposure time and 10 ms exposure time on May 24, 2024

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Fig. 6. Comparison of data on May 24, 2024. (a) Comparison of systematic error ratios; (b) comparison of centroid variance ratios; (c) average ratio values

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Fig. 7. Comparison of data from September 18 to 19, 2024. (a) Comparison of system error ratios; (b) comparison of centroid variance ratios; (c) average ratio values

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Fig. 8. Comparison of data on September 23, 2024. (a) Comparison of systematic error ratios; (b) comparison of centroid variance ratios; (c) average ratio values

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Fig. 9. Comparison of atmospheric coherence length data for nights of June 15 to 16, 2024

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Fig. 10. Comparison of atmospheric coherence length data on September 20, 2024

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Table 1. Grouping of experimental groups

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Table 1. Grouping of experimental groups

Group No.	Testing time for the first experiment	Testing time for the second experiment	Testing time for the third experiment	Exposure time of the experimental group /ms
1‒10	00：07—00：51	23：00—23：15	20：12—20：26	9
11‒20	00：56—01：34	23：16—23：30	20：27—20：40	8
21‒30	01：37—01：49	23：31—23：45	20：41—20：56	7
31‒40	01：50—02：03	23：46—00：01	20：57—21：13	6
41‒50	02：14—02：29	00：02—00：16	21：14—21：30	5
51‒60	02：30—02：39	00：17—00：32	21：31—21：48	4
61‒70	02：40—02：48	00：33—00：45	21：49—22：05	3
71‒80	02：49—02：57	00：46—00：58	22：06—22：25	2
81‒90	02：57—03：05	00：59—01：17	22：26—22：45	1

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Wei Zhao, Shuai Chang, Ye Gu, Lei Zhang, Xin Zhao, Chunyu Guo, Hongyu Zhao, Wei Xu. Selection of Optimal Exposure Time in Changchun Area Based on Atmospheric Coherence Length Measurement Instrument[J]. Acta Optica Sinica, 2025, 45(6): 0601008

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