Image-Quality Evaluation of High-Spatial-Resolution Satellite Optical Sensor Based on Radial Target

Weiwei Xu; Liming Zhang; Xiaolong Si; Baoyun Yang; Jixiang Wang

doi:10.3788/AOS201939.0928003

Acta Optica Sinica, Volume. 39, Issue 9, 0928003(2019)

Image-Quality Evaluation of High-Spatial-Resolution Satellite Optical Sensor Based on Radial Target

Weiwei Xu^1,2、*, Liming Zhang^1,2, Xiaolong Si^1,2, Baoyun Yang^1,2, and Jixiang Wang^1,2

¹ Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China

² Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China

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Figures & Tables(7)

Fig. 1. Remote sensing image of target

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Fig. 2. Reflectance of target

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Fig. 3. MTF plots measured by knife-edge method

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Table 1. Results of spatial resolution measurement
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Table 1. Results of spatial resolution measurement
Direction Spatial resolution /m
Cross 5.09
Along 5.04

Table 2. Image response values of large-area target

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Table 2. Image response values of large-area target

Relative pixel coordinate	Digital number
	Low reflectance target					High reflectance target
	1	2	3	4	5	1	2	3	4	5
1	190	188	191	189	187	858	847	858	857	859
2	184	189	191	189	186	850	852	852	852	859
3	186	189	191	189	185	853	853	855	853	859
4	184	185	187	185	183	856	856	858	855	859
5	183	184	183	183	183	862	860	860	857	861
Average	187					856

Table 3. Image response values of radial target

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Table 3. Image response values of radial target

Relative pixel coordinate	Digital number
	Along-direction					Cross-direction
	1	2	3	4	5	1	2	3	4	5
1	592	445	621	448	598	575	581	593	603	610
2	581	434	605	432	586	390	403	410	422	437
3	569	421	590	422	571	587	599	604	612	624
4	565	412	581	415	569	392	406	411	419	438
5	558	401	569	404	547	576	586	598	601	611

Table 4. Results of on-orbit MTF measurement
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Table 4. Results of on-orbit MTF measurement
Category MTF
Cross-direction Along-direction
Atmospheric 0.7519
Without atmospheric 0.2322 0.2049
With atmospheric 0.1746 0.1540

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Weiwei Xu, Liming Zhang, Xiaolong Si, Baoyun Yang, Jixiang Wang. Image-Quality Evaluation of High-Spatial-Resolution Satellite Optical Sensor Based on Radial Target[J]. Acta Optica Sinica, 2019, 39(9): 0928003

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