Laser & Optoelectronics Progress, Volume. 60, Issue 22, 2228007(2023)
Calibration and Validation of FY_3D MERSI-II Based on BRDF model
Figures & Tables(12)
Fig. 1. Relative spectral response function of each band of FY_3D MERSI-II(B1‒B4,B8‒B15)
Fig. 3. Comparison results of apparent reflectivity between satellite observation and model calculation under different zenith angle of FY_3D satellites in 2021. (a) 2021-09-19,VZA:33.20°; (b) 2021-09-20,VZA:5.33°; (c) 2021-09-25,VZA:13.25°; (d) 2021-09-26,VZA:33.20°
Fig. 4. Comparison results of apparent reflectivity between satellite observation and model calculation under different zenith angle of FY_3D satellites in 2022. (a) 2022-07-19,VZA:7.28°; (b) 2022-07-09,VZA:17.14°; (c) 2022-07-24,VZA:19.40°; (d) 2022-07-21,VZA:43.78°
Table 1. Observed geometric parameters and atmospheric parameters for the FY_3D satellite transit in 2021
View tableTable 1. Observed geometric parameters and atmospheric parameters for the FY_3D satellite transit in 2021
Date 09-19 09-20 09-25 09-26 Time 15∶15 14∶55 15∶15 14∶20 SZA /（°） 44.84 43.21 45.68 44.33 SAA /（°） 216.64 210.29 211.46 205.10 VZA /（°） 33.20 5.33 13.25 17.12 VAA /（°） 262.41 260.13 260.24 76.18 AOD（550 nm） 0.138 0.133 0.253 0.119 Water vapor /（g·cm2） 0.651 1.267 1.064 0.405
Table 2. Observed geometric parameters and atmospheric parameters for the FY_3D satellite transit in 2022
View tableTable 2. Observed geometric parameters and atmospheric parameters for the FY_3D satellite transit in 2022
Date 07-09 07-19 07-21 07-24 Time 15∶15 15∶05 14∶30 15∶25 SZA /（°） 22.37 25.58 21.57 27.47 SAA /（°） 222.34 227.03 207.59 228.95 VZA /（°） 17.12 7.28 43.78 19.40 VAA /（°） 76.19 260.55 72.94 260.97 AOD（550 nm） 0.006 0.270 0.007 0.153 Water vapor /（g·cm2） 1.030 1.055 1.071 0.862
Table 3. Change of surface reflectance of different BRDF models on 2022-07-19 (T0‒T6 represents multi-angle observation data of UAV at different times)
View tableTable 3. Change of surface reflectance of different BRDF models on 2022-07-19 (T0‒T6 represents multi-angle observation data of UAV at different times)
Relative deviation /% SZA /（°） 44.61 40.53 45.03 58.21 64.64 49.28 44.94 Observation data T0 T1 T2 T3 T4 T5 T6 Average thick_sparse 0.28 0.32 0.32 0.33 0.24 0.24 0.24 0.28 thick_dense 0.31 0.35 0.42 0.40 0.25 0.24 0.26 0.32 thick_transit 0.25 0.29 0.24 0.24 0.24 0.22 0.21 0.24 thin_sparse 0.31 0.37 0.32 0.39 0.34 0.31 0.29 0.33 thin_dense 0.56 0.68 0.77 0.82 0.65 0.64 0.67 0.69 thin_transit 0.24 0.68 0.22 0.24 0.24 0.23 0.21 0.30 Average 0.32 0.45 0.38 0.40 0.33 0.31 0.31
Table 4. Change of surface reflectance of different BRDF models on 2022-07-24 (T0‒T6 represents multi-angle observation data of UAV at different times
View tableTable 4. Change of surface reflectance of different BRDF models on 2022-07-24 (T0‒T6 represents multi-angle observation data of UAV at different times
Relative deviation /% SZA /（°） 44.61 40.53 45.03 58.21 64.64 49.28 44.94 Observation data T0 T1 T2 T3 T4 T5 T6 Average thick_sparse 1.29 1.07 0.98 1.02 1.55 1.60 1.96 1.35 thick_dense 1.16 1.04 1.46 0.92 1.55 1.59 1.46 1.31 thick_transit 1.58 1.21 1.32 1.37 1.95 1.77 1.75 1.56 thin_sparse 1.04 0.85 0.96 0.79 0.94 1.07 1.13 0.97 thin_dense 0.37 0.10 0.13 0.26 0.21 0.24 1.15 0.35 thin_transit 1.60 1.17 1.46 1.33 1.62 1.60 1.75 1.50 Average 1.17 0.91 1.05 0.95 1.31 1.31 1.53
Table 5. Change of surface reflectance of different BRDF models on 2022-07-21 (T0‒T6 represents multi-angle observation data of UAV at different times)
View tableTable 5. Change of surface reflectance of different BRDF models on 2022-07-21 (T0‒T6 represents multi-angle observation data of UAV at different times)
Relative deviation /% SZA /（°） 44.61 40.53 45.03 58.21 64.64 49.28 44.94 Observation data T0 T1 T2 T3 T4 T5 T6 Average thick_sparse 1.24 1.65 2.05 1.76 2.19 1.92 2.16 1.85 thick_dense 1.96 1.00 0.55 0.67 1.64 2.05 1.46 1.33 thick_transit 2.88 2.08 3.26 2.77 3.19 2.59 3.05 2.83 thin_sparse 2.36 1.87 2.33 1.79 1.90 2.17 1.98 2.06 thin_dense 0.69 0.44 0.98 1.30 0.43 0.36 0.58 0.68 thin_transit 3.73 2.71 3.58 3.12 3.53 2.42 3.76 3.26 Average 2.14 1.63 2.12 1.90 2.15 1.92 2.17
Table 6. Change of surface reflectance of different BRDF models on 2022-07-22 (T0‒T6 represents multi-angle observation data of UAV at different times)
View tableTable 6. Change of surface reflectance of different BRDF models on 2022-07-22 (T0‒T6 represents multi-angle observation data of UAV at different times)
Relative deviation /% SZA /（°） 44.61 40.53 45.03 58.21 64.64 49.28 44.94 Observation data T0 T1 T2 T3 T4 T5 T6 Average thick_sparse 2.03 1.73 3.17 2.04 2.11 1.46 2.13 2.10 thick_dense 1.85 2.44 2.21 1.98 3.03 2.01 2.59 2.30 thick_transit 3.50 2.41 4.66 3.57 3.56 2.58 3.59 3.41 thin_sparse 3.25 2.54 3.29 2.45 2.44 2.81 3.26 2.86 thin_dense 0.84 1.07 1.81 1.45 0.83 1.13 1.43 1.22 thin_transit 5.20 3.76 4.66 3.53 4.35 4.29 3.58 4.20 Average 2.78 2.33 3.30 2.50 2.72 2.38 2.76
Table 7. Relative deviation of the apparent reflectance from satellite observation calculated by the model in September 2021
View tableTable 7. Relative deviation of the apparent reflectance from satellite observation calculated by the model in September 2021
Date Relative deviation /% B1
（412 nm）
B2
（443 nm）
B3
（470 nm）
B4
（490 nm）
B5
（550
nm）
B6
（555
nm）
B7
（650
nm）
B8
（670
nm）
B9
（709
nm）
B10
（746
nm）
B11
（865 nm）
B12
（866
nm）
Average 3.96 3.80 3.72 3.13 3.13 2.92 2.75 5.22 3.04 2.31 3.05 2.53 2021-09-19 4.67 3.40 4.31 1.79 5.76 3.13 3.77 7.31 2.23 1.82 4.69 3.34 2021-09-20 6.85 6.64 4.88 5.66 0.23 1.95 0.45 4.35 3.23 0.84 1.22 0.48 2021-09-25 1.08 1.07 2.48 1.01 5.49 3.30 3.98 7.90 1.31 1.77 4.66 2.81 2021-09-26 3.22 4.07 3.21 4.07 1.03 3.30 2.81 1.31 5.40 4.79 1.62 3.49
Table 8. Relative deviation of the apparent reflectance from satellite observation calculated by the model in July 2022
View tableTable 8. Relative deviation of the apparent reflectance from satellite observation calculated by the model in July 2022
Date Relative deviation /% B1
（412 nm）
B2
（443 nm）
B3
（470 nm）
B4
（490 nm）
B5
（550 nm）
B6
（555 nm）
B7
（650 nm）
B8
（670 nm）
B9
（709 nm）
B10
（746 nm）
B11
（865 nm）
B12
（866 nm）
Average 12.15 8.57 4.85 5.59 3.24 3.21 2.85 5.26 2.99 3.28 5.74 5.39 2022-07-19 9.51 5.87 3.11 3.61 3.74 2.46 4.21 7.22 4.80 3.99 7.19 7.94 2022-07-09 9.87 5.88 0.88 2.13 4.31 1.40 2.50 6.63 2.98 3.84 5.81 5.26 2022-07-24 12.76 9.56 5.80 7.09 0.79 3.14 0.53 3.90 0.89 2.04 5.87 4.97 2022-07-21 16.46 12.97 9.58 9.54 4.13 5.82 4.16 3.27 3.27 3.27 4.09 3.40
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Yanbing Heng, Jun Pan, Hailiang Gao, Kaisi Wang, Xinge Dou. Calibration and Validation of FY_3D MERSI-II Based on BRDF model[J]. Laser & Optoelectronics Progress, 2023, 60(22): 2228007
Paper Information
Category: Remote Sensing and Sensors
Received: Feb. 13, 2023
Accepted: Mar. 13, 2023
Published Online: Nov. 24, 2023
The Author Email: Hailiang Gao (gaohl200439@aricas.ac.cn)
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