Simulation Study on Effect of Atmospheric Turbulence on Space-Based Optical Imaging System

Xinxin Chen; Kee Yuan; Dongfeng Shi; Jian Huang; Yingjian Wang

doi:10.3788/AOS202242.1801002

Acta Optica Sinica, Volume. 42, Issue 18, 1801002(2022)

Simulation Study on Effect of Atmospheric Turbulence on Space-Based Optical Imaging System

Xinxin Chen^1,2,3, Kee Yuan^1,3、*, Dongfeng Shi^1,3, Jian Huang^1,3, and Yingjian Wang^1,3

¹Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China

²Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, Anhui, China

³Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, Anhui, China

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Figures & Tables(12)

Fig. 1. Atmospheric radiation transfer process

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Fig. 2. Simulation of light wave transmission. (a) schematic diagram of simulation model; (b) flow chart of imaging simulation

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Fig. 3. Original image and two-dimensional light intensity distribution. (a) Original image; (b) intensity distribution

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Fig. 4. Imaging result and two-dimensional light intensity distribution under different D. (a1)(a2) D=0.10 m; (b1)(b2) D=0.25 m;(c1)(c2) D= $r_{0}$ ; (d1)(d2) D=1.5 $r_{0}$ ; (e1)(e2) D=2.0 $r_{0}$ ; (f1)(f2) D=2.5 $r_{0}$

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$Atmospheric refractive index structure constant and atmospheric coherence length varying with transmission distance. (a) Atmospheric refractive index structure constant varying with transmission distance; (b) atmospheric coherence length varying with transmission distance$

Fig. 5. Atmospheric refractive index structure constant and atmospheric coherence length varying with transmission distance. (a) Atmospheric refractive index structure constant varying with transmission distance; (b) atmospheric coherence length varying with transmission distance

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Fig. 6. Imaging result and two-dimensional light intensity distribution at 30 km transmission distance. (a1)(a2) Width of fringe and interval is 0.028 m; (b1)(b2) width of fringe and interval is 0.035 m

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Fig. 7. Imaging result and two-dimensional light intensity distribution at 50 km transmission distance. (a1)(a2) Width of fringe and interval is $0.0305 m$ ; (b1)(b2) width of fringe and interval is 0.0366 m

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Fig. 8. Minimum resolvable length varying with transmission distance under different turbulence models

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Fig. 9. Imaging results. (a) Adding upper tropopause turbulence; (b) ignoring upper tropopause turbulence

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Fig. 10. Minimum resolvable length varying with transmission distance when adding upper tropopause turbulence and ignoring upper tropopause turbulence

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Table 1. Numerical simulation parameters

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Table 1. Numerical simulation parameters

Parameter	Description
Wavelength $λ$ /μm	0.5
Number of grids N	512×512
Independent transmission time	100
Imaging time	15
Transmission distance L /km	20
Grid size ∆x /m	0.00475
Atmospheric coherence length $r_{0}$ /m Aperture size D /m	0.3667 0.1000，0.2500，0.3667，0.5500，0.7334，0.9168
Constant model of atmospheric refractive index structure $C_{n}^{2}$ / $m^{- 2 / 3}$	HV5/7

Table 2. Results of minimum resolvable length of ground object in atmospheric turbulence imaging under different transmission distances by HV5/7 model

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Table 2. Results of minimum resolvable length of ground object in atmospheric turbulence imaging under different transmission distances by HV5/7 model

Transmission distance /km

Grid size /m

Distinguishable mesh number

Theoretical minimum resolvable length /m

Actual minimum resolvable

length /m

0.00213

0.00849

0.00852

0.00373

0.00382

0.00540

0.00700

0.00702

0.00610

0.00730

0.00740

0.01497

0.02684

0.03329

0.03505

0.03503

0.01492

0.02292

0.02700

0.03500

0.03510

0.03660

0.03650

0.03700

0.00740

0.03503

0.03700

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Xinxin Chen, Kee Yuan, Dongfeng Shi, Jian Huang, Yingjian Wang. Simulation Study on Effect of Atmospheric Turbulence on Space-Based Optical Imaging System[J]. Acta Optica Sinica, 2022, 42(18): 1801002

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Paper Information

Category: Atmospheric Optics and Oceanic Optics

Received: Nov. 18, 2021

Accepted: Jan. 17, 2022

Published Online: Sep. 15, 2022

The Author Email: Yuan Kee (keyuan@aiofm.ac.cn)

DOI:10.3788/AOS202242.1801002

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