Multi-Sensor Cooperative Radiometric Calibration Method of Mapping Satellite-1

Lili Du; Weining Yi; Yu Wang; Wenyu Cui; Wei Fang

doi:10.3788/AOS201939.0401001

Acta Optica Sinica, Volume. 39, Issue 4, 0401001(2019)

Multi-Sensor Cooperative Radiometric Calibration Method of Mapping Satellite-1

Lili Du¹, Weining Yi¹, Yu Wang², Wenyu Cui¹, and Wei Fang^1、*

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

² Xi'an Institute of Surveying and Mapping, Xi'an, Shaanxi 710054, China

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Figures & Tables(12)

Fig. 1. Flow chart of multi-sensor cooperative radiometric calibration algorithm base on gray-scale tarps

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Fig. 2. Layout of gray-scale tarps on-site. (a) Zhaodong; (b) Lijiang

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Fig. 3. Reflectance curves of targets and typical objects. (a) Gray-scale tarps and blackland, Zhaodong, 2014-10-16; (b) gray-scale tarps and grassland, Lijiang, 2014-12-14; (c) gray-scale tarps, Lijiang, 2015-01-23; (d) color targets, Lijiang, 2015-01-23

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Fig. 4. Instantaneous aerosol optical depth. (a) Zhaodong, 2014-10-16; (b) Lijiang, 2014-12-14; (c) Lijiang, 2015-01-23

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Fig. 5. Relative spectral response of GFB and DGP camera

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Fig. 6. Radiance relationship between GFB and DGP cameras

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Fig. 7. Absolute radiometric calibration coefficient of DGP camera obtained by cooperative calibration

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Fig. 8. Comparison between inversed and measured object reflectance

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Table 1. Description of sites passed by Mapping Satellite-1

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Table 1. Description of sites passed by Mapping Satellite-1

Site	Longitude & latitude	Altitude /m	Passed time	Surface
Zhaodong	125.8170°E46.2167°N	140	2014-10-16T13:45	Black land covered a large and flat area
Lijiang	100.2220°E26.9360°N	2470	2014-12-14T15:062015-01-23T15:11	Grass land covered a large and flat area

Table 2. Geometrical condition and AOD at 550 nm
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Table 2. Geometrical condition and AOD at 550 nm
Site Date Sun zenith /(°) Sun azimuth /(°) View zenith /(°) View azimuth /(°) AOD at 550 nm
Zhaodong 2014-10-16 63.44 220.10 6 283.7 0.077
Lijiang 2014-12-14 56.96 211.08 10 101.2 0.082
2015-01-23 52.62 210.33 0 0° 0.089

Table 3. Comparison between cooperative and site radiometric calibration coefficient of DGP camera

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Table 3. Comparison between cooperative and site radiometric calibration coefficient of DGP camera

Channel of camera	Cooperative calibration		Site calibration		Relative difference(mid-level radiance) /%
Channel of camera	K	B	K	B	Relative difference(mid-level radiance) /%
DGP-R	0.423	8.028	0.421	7.873	0.1
DGP-G	0.423	7.968	0.424	7.066	3.2
DGP-B	0.484	12.553	0.464	11.173	1.4
DGP-NIR	0.785	4.819	0.770	6.754	5.3

Table 4. Difference between inversed and measured object reflectance

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Table 4. Difference between inversed and measured object reflectance

Object	Difference of R-channel		Difference of G-channel		Difference of B-channel		Difference of NIR-channel
Object	Absolute	Relative /%	Absolute	Relative /%	Absolute	Relative /%	Absolute	Relative /%
Yellow tarp	0.040	5.31	0.035	5.72	0.011	5.44	0.017	2.07
Blue target	0.008	4.39	0.008	4.18	0.025	10.86	0.024	5.97
Green target	0.006	5.44	0.006	3.05	0.034	13.75	0.012	5.79
Orange target	0.025	4.46	0.016	5.61	0.002	1.65	0.015	2.33
Purple target	0.004	1.96	0.009	5.59	0.019	9.15	0.021	5.29
Red tarp	0.033	4.61	0.009	4.80	0.008	5.02	0.007	0.91
Grassland	0.007	4.14	0.005	4.43	0.008	10.81	0.009	3.75
Mean difference	0.018	4.30	0.012	4.80	0.0015	8.10	0.015	3.70

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Lili Du, Weining Yi, Yu Wang, Wenyu Cui, Wei Fang. Multi-Sensor Cooperative Radiometric Calibration Method of Mapping Satellite-1[J]. Acta Optica Sinica, 2019, 39(4): 0401001

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