Optics and Precision Engineering, Volume. 30, Issue 2, 178(2022)
Imaging parameter setting and calibration test of Tianwen-1 high-resolution camera
Figures & Tables(12)
Fig. 3. Relationship between panchromatic gray value and integral number
Fig. 5. Relationship between panchromatic gray value and integral time
Table 1. Solar irradiance at the upper limit of the earth atmosphere
View tableView in ArticleTable 1. Solar irradiance at the upper limit of the earth atmosphere
火星相机工作谱段/μm 地球大气上界太阳直射辐照度/（W·m-2） 0.45~0.90 654.2 0.45~0.52 135.3 0.52~0.60 144.3 0.63~0.69 90.7 0.76~0.90 143.9
Table 2. Estimation of panchromatic radiance with different solar altitudes and reflectances
View tableView in ArticleTable 2. Estimation of panchromatic radiance with different solar altitudes and reflectances
反射率ρ 入瞳辐亮度/（W·m-2·sr-1） 5° 10° 20° 30° 40° 50° 60° 70° 80° 85° 0.05 0.39 0.78 1.54 2.25 2.90 3.45 3.90 4.23 4.44 4.49 0.1 0.79 1.57 3.08 4.51 5.79 6.90 7.81 8.47 8.88 8.98 0.2 1.57 3.13 6.16 9.01 11.59 13.81 15.61 16.94 17.75 17.96 0.3 2.36 4.70 9.25 13.52 17.38 20.71 23.42 25.41 26.63 26.93 0.4 3.14 6.26 12.33 18.03 23.17 27.62 31.22 33.88 35.50 35.91 0.5 3.93 7.83 15.41 22.53 28.97 34.52 39.03 42.35 44.38 44.89 0.6 4.71 9.39 18.49 27.04 34.76 41.42 46.83 50.81 53.25 53.87 0.7 5.50 10.96 21.58 31.54 40.55 48.33 54.64 59.28 62.13 62.85 0.8 6.28 12.52 24.66 36.05 46.35 55.23 62.44 67.75 71.01 71.83
Table 3. Table of integral time
View tableView in ArticleTable 3. Table of integral time
火星轨道高度/km 全色积分时间/ms 265 0.12411 300 0.14321 350 0.17157 400 0.20115 450 0.2321 500 0.26435 550 0.29762 600 0.3327 650 0.37076 700 0.40698 750 0.44872 800 0.48343
Table 4. Integral numbers with 0.2 reflectance coefficient
View tableView in ArticleTable 4. Integral numbers with 0.2 reflectance coefficient
轨道高度/km 积分级数 5° 20° 30° 40° 60° 70° 85° 265 96级 32级 32级 16级 16级 16级 16级 300 96级 32级 16级 16级 16级 16级 8级 400 64级 16级 16级 16级 8级 8级 8级 500 48级 16级 16级 8级 8级 8级 8级 600 48级 16级 8级 8级 8级 8级 8级 700 32级 8级 8级 8级 8级 8级 8级 800 32级 8级 8级 8级 8级 8级 8级
Table 5. Result of camera response nonuniformity
View tableView in ArticleTable 5. Result of camera response nonuniformity
谱段 积分
级数
像元平均灰度 标准
偏差
PRNU（%） PAN 32 2048.2 15.8 0.77 B1 16 1990.6 16.7 0.84 B2 12 2019.9 9.0 0.45 B3 16 1996.7 6. 9 0.35 B4 8 1901.9 11.7 0.62
Table 6. Estimation of camera radiance with typical lighting condition
View tableView in ArticleTable 6. Estimation of camera radiance with typical lighting condition
工作谱段 入辐射亮度/（W·m-2∙sr-1） PAN 9.01 B1 1.86 B2 1.99 B3 1.25 B4 1.98
Table 7. Result of SNR with typical lighting condition
View tableView in ArticleTable 7. Result of SNR with typical lighting condition
谱段 轨道
高度
积分
级数
SNR（倍） CCD1 CCD2 CCD3 PAN 265 km 32级 109 115.1 105.8 B1 16级 109.2 117.9 146.4 B2 12级 138 118.1 134.6 B3 16级 149.8 142.1 161 B4 16级 106.5 122.9 118.7
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Wenguang LIU, Xiaodong WANG, Jihong DONG, Fan ZHANG. Imaging parameter setting and calibration test of Tianwen-1 high-resolution camera[J]. Optics and Precision Engineering, 2022, 30(2): 178
Paper Information
Received: Sep. 23, 2020
Accepted: --
Published Online: Mar. 4, 2022
The Author Email: LIU Wenguang (liuwenguangace@gmail.com)
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