Acta Photonica Sinica, Volume. 49, Issue 12, 138(2020)
An Effectiveness Evaluation Method for Space-based Optical Imaging Systems
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Table 1. Johnson criteria
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Discrimination measure Description One-dimensional (1-D) criteria (number cycles) n Two-dimensional (2-D) criteria (number cycles) n Detection Blob has a reasonable probability of being the sought object 1.0 0.75 Recognition Object discerned with sufficient clarity such that its specific class can be differentiated (tank, truck, man) 4.0 3.0 Identification Object discerned with sufficient clarity to specify the type within a class (T-62, T-72, M1 tanks) 8.0 6.0
Table 2. The relevant parameters of aviation experiment
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Parameter name Number Parameter name Number Diameter of aperture 20 mm Focal length 5 mm Transmittance of optical system 0.7 GSD 0.5 m Height 586 m SNRDT 2.25
Table 3. Main technical parameters of GF-2 satellite
View tableView in ArticleTable 3. Main technical parameters of GF-2 satellite
Parameter name Number Parameter name Number Dynamic range ≥25 dB (θ=20°，ρ=0.05)；≥46 dB (θ=70°，ρ=0.65) Relative aperture 1/15 MTF 0.12 Focal length 7.8 m GSD 0.8 m Orbital height 631 km SNRDT 2.25
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Xiao-tian LU, Feng LI, Bian XIAO, Xue YANG, Lei XIN, Ming LU, Zhi-jia LIU. An Effectiveness Evaluation Method for Space-based Optical Imaging Systems[J]. Acta Photonica Sinica, 2020, 49(12): 138
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Jul. 14, 2020
Accepted: Sep. 23, 2020
Published Online: Mar. 11, 2021
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