An Effectiveness Evaluation Method for Space-based Optical Imaging Systems

Xiao-tian LU; Feng LI; Bian XIAO; Xue YANG; Lei XIN; Ming LU; Zhi-jia LIU

doi:10.3788/gzxb20204912.1212002

Journals >Acta Photonica Sinica >Volume 49 >Issue 12 >Page 138 > Article

Acta Photonica Sinica
Vol. 49, Issue 12, 138 (2020)

An Effectiveness Evaluation Method for Space-based Optical Imaging Systems

Xiao-tian LU¹, Feng LI¹, Bian XIAO^1、2, Xue YANG¹, Lei XIN¹, Ming LU¹, and Zhi-jia LIU³

Author Affiliations

¹Qian Xuesen Laboratory of Space Technology， Beijing00094， China

²Henan University， Kaifeng， Henan475000， China

³DFH Satellite Co.， Ltd， Beijing100094， China

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DOI: 10.3788/gzxb20204912.1212002 Cite this Article

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 Copy Citation Text

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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 1. Johnson criteria

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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	SNR_DT	2.25

Table 2. The relevant parameters of aviation experiment

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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

Table 3. Main technical parameters of GF-2 satellite

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

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