光学学报, 2020, 40 (20): 2029001, 网络出版: 2020-09-30 复制并引用该论文  本文已被引 1 次  被引通知

图 & 表

图 1. VIMI的星上定标流程

Fig. 1. On-board calibration process on VIMI

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图 2. SDRDM的工作原理图

Fig. 2. Working schematic diagram of SDRDM

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图 3. SDRDM太阳观测口信号随方位角的变化曲线

Fig. 3. Change curve of SDRDM solar observation port signal with azimuth

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图 4. H因子随时间及方位夹角的变化曲线

Fig. 4. H factor change curve with time and azimuth

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图 5. B₃、B₅波段修正后的H因子曲线

Fig. 5. H factor curve after correction for B₃ and B₅ bands

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表 1相近方位夹角下的H因子

Table1. H factor under the angle of similar azimuth

Date|Azimuth /(°) B1 B3 Br B5 2018/8/28|157.739 1 1 1 1 2019/4/16|158.967 0.9961 0.9899 0.9917 0.9905 2019/5/16|161.206 1.0076 0.9926 0.9932 0.9926 2019/8/28|159.846 1.0073 0.9984 1.0020 1.0025 2020/3/17|159.415 1.0046 1.0016 1.0050 1.0076 Average 0.0049 0.0050 0.0058 0.0071

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表 2SDRDM监测测量的不确定度

Table2. Uncertainty of SDRDM monitoring measurement

Source Uncertainty /% Relative SD BRDF measurement (μ1) 0.50 Relative SD cosine error of incidence (μ2) 0.54 Relationship between transmittance distribution and incident angle (μ3) 0.35 Stability of SDRDM (μ4) 0.10 Stray light (μ5) 0.27 Total uncertainty (U) 0.86

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表 3SD星上出射光谱辐亮度不确定度

Table3. Uncertainty of the SD on-board emitted spectrum radiance

Source Uncertainty /% SD BRDF measurement (μ1) 1 SD cosine error of incidence (μ2) 0.54 SD radiance non-uniformity (μ3) 0.90 Earth-sun distance correction factor (μ4) 0.20 SD stability monitor (μ5) 0.86 Measurement of SD H factor before launch (μ6) 0.50 Solar spectral irradiance (μ7) 1 Stray light (μ8) 2.72 Total uncertainty (U) 3.40

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黄文薪, 张黎明, 司孝龙, 许和鱼, 陈洪耀, 李鑫, 赵艳华. GF-5全谱段光谱成像仪星上定标组件在轨性能评价[J]. 光学学报, 2020, 40(20): 2029001. Wenxin Huang, Liming Zhang, Xiaolong Si, Heyu Xu, Hongyao Chen, Xin Li, Yanhua Zhao. On-Orbit Performance Evaluation of On-Board Calibration Component of GF-5 Visible and Infrared Multispectral Imager[J]. Acta Optica Sinica, 2020, 40(20): 2029001.