基于GF-4数据分析低分辨率卫星云检测尺度误差对下行辐射计算的影响
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裔传祥, 辛晓洲, 胡继超, 张海龙, 李小军, 龚围
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Analysis of Cloud Scale Error of Low Resolution Satellite Based on GF-4 and Its Influence on Downward Radiation Calculation
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Chuanxiang Yi, Xiaozhou Xin, Jichao Hu, Hailong Zhang, Xiaojun Li, Wei Gong
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| 表2 风云二号数据模拟下行短波辐射误差统计表 |
| Table 2 Short wave radiation error statistics table for FY-2 data simulation |
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| 序号 | 时间 | 像元标志 | 实际云所占
比例/% | 绝对误差
/(W/m2) | 下行短波辐射
相对误差/% | 一天相对误差
/% | | 1 | 9:00 | 云 | 91.56 | -46.97 | -10.51 | 1.32 | | 10:30 | 晴 | 100.00 | 490.67 | 153.07 | | 12:00 | 云 | 82.70 | -76.79 | -22.00 | | 13:30 | 云 | 99.16 | -3.30 | -0.97 | | 15:00 | 云 | 100.00 | 0.00 | 0.00 | | 16:30 | 云 | 32.00 | -327.76 | -39.34 | | 2 | 9:00 | 云 | 98.70 | -6.63 | -1.50 | -20.20 | | 10:30 | 晴 | 100.00 | 452.99 | 56.07 | | 12:00 | 云 | 30.77 | -285.02 | -94.57 | | 13:30 | 云 | 64.44 | -178.82 | -78.21 | | 15:00 | 云 | 100.00 | -0.00 | 0.00 | | 16:30 | 云 | 8.65 | -591.86 | -173.52 | | 3 | 9:00 | 云 | 54.16 | -45.06 | -5.17 | -9.70 | | 10:30 | 晴 | 53.47 | 56.02 | 7.71 | | 12:00 | 云 | 64.44 | -38.04 | -6.12 | | 13:30 | 云 | 100.00 | 0.00 | 0.00 | | 15:00 | 云 | 61.36 | -126.90 | -19.32 | | 16:30 | 云 | 27.33 | -251.82 | -28.43 | | 4 | 9:00 | 云 | 59.84 | -65.18 | -8.52 | -8.70 | | 10:30 | 晴 | 97.59 | 161.06 | 20.51 | | 12:00 | 云 | 46.85 | -86.73 | -16.39 | | 13:30 | 云 | 64.12 | -67.45 | -12.61 | | 15:00 | 云 | 23.22 | -147.12 | -22.14 | | 16:30 | 云 | 20.07 | -151.52 | -19.21 | | 5 | 9:00 | 晴 | 36.11 | 12.12 | 1.33 | -10.73 | | 10:30 | 晴 | 56.77 | 21.32 | 2.81 | | 12:00 | 云 | 48.57 | -20.50 | -3.07 | | 13:30 | 云 | 80.26 | -50.51 | -9.72 | | 15:00 | 云 | 15.59 | -230.01 | -28.19 | | 16:30 | 云 | 19.63 | -225.85 | -24.40 | | 6 | 9:00 | 晴 | 10.53 | 0.87 | 0.09 | -3.62 | | 10:30 | 晴 | 80.97 | 7.53 | 0.97 | | 12:00 | 云 | 1.10 | -9.92 | -1.46 | | 13:30 | 云 | 21.13 | -71.97 | -11.42 | | 15:00 | 云 | 46.59 | -46.03 | -5.99 | | 16:30 | 云 | 29.77 | -55.97 | -6.24 | | 7 | 9:00 | 云 | 0.81 | -102.09 | -19.54 | -4.39 | | 10:30 | 云 | 1.00 | 0.00 | 0.00 | | 12:00 | 云 | 0.94 | -26.37 | -8.43 | | 13:30 | 云 | 1.00 | 0.00 | 0.00 | | 15:00 | 云 | 1.00 | 0.00 | 0.00 | | 16:30 | 云 | 1.00 | 0.00 | 0.00 | | 8 | 9:00 | 晴 | 0.00 | 0.00 | 0.00 | -14.76 | | 10:30 | 晴 | 0.05 | 0.97 | 0.12 | | 12:00 | 云 | 0.23 | -15.96 | -2.40 | | 13:30 | 云 | 0.27 | -250.91 | -65.37 | | 15:00 | 云 | 1.00 | 0.00 | 0.00 | | 16:30 | 云 | 0.04 | -392.80 | -68.34 |
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