On-Orbit Modulation Transfer Function Estimation of Optical Satellite Camera

Weiwei Xu; Liming Zhang; Baoyun Yang; Jixiang Wang

doi:10.3788/AOS202040.2228001

Acta Optica Sinica, Volume. 40, Issue 22, 2228001(2020)

On-Orbit Modulation Transfer Function Estimation of Optical Satellite Camera

Weiwei Xu^*, Liming Zhang, Baoyun Yang, and Jixiang Wang

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

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Figures & Tables(5)

Fig. 1. Remote sensing image of targets

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Fig. 2. Estimation results by point source method. (a) Fitted point spread function; (b) MTF curve

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Fig. 3. Estimation results by knife-edge method. (a) Fitted edge spread; (b) MTF curve

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Table 1. Image response values of targets

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Table 1. Image response values of targets

Relative pixelcoordinate	Large-area target			Radial target
Relative pixelcoordinate	Low reflectance	High reflectance		In orbit direction		Perpendicular to orbit direction
(1,1)	184		855		443		416
(1,2)	185		856		593		423
(1,3)	182		858		441		435
(2,1)	183		856		430		590
(2,2)	186		857		581		598
(2,3)	183		859		431		606
(3,1)	182		859		421		419
(3,2)	183		859		568		424
(3,3)	182		856		424		432

Table 2. On-orbit MTF detection results at Nyquist frequency
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Table 2. On-orbit MTF detection results at Nyquist frequency
Direction Point source method Square wave method Knife-edge method Relative error /%
In orbit direction 0.2299 0.2049 0.2185 -5.91
Perpendicular to orbit direction 0.1964 0.1783 0.1846 5.35

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Weiwei Xu, Liming Zhang, Baoyun Yang, Jixiang Wang. On-Orbit Modulation Transfer Function Estimation of Optical Satellite Camera[J]. Acta Optica Sinica, 2020, 40(22): 2228001

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