Acta Optica Sinica, Volume. 40, Issue 18, 1828001(2020)
Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS
Figures & Tables(13)
Fig. 2. Time series of TOA reflectance observed by SeaWiFS versus BRDF modeling over Libya-4
Fig. 4. SRF of SeaWiFS and MERSI, as well as simulated TOA spectral radiance for four different scenarios of gaseous absorption over desert
Fig. 5. Mean of the bias between modeled TOA reflectance and MERSI L1 TOA reflectance of the six pseudo-invariant targets (the error bar represents the standard deviation of the bias). (a) Algeria-3; (b) Algeria-5; (c) Libya-1; (d) Libya-4; (e) Mauritania-1; (f) Mauritania-2
Fig. 7. Time series of monthly mean relative deviation from 2011 to 2015 between cross-calibration reflectance and MERSI L1 calibration data. (a) Algeria-3; (b) Algeria-5; (c) Libya-1; (d) Libya-4; (e) Mauritania-1; (f) Mauritania-2
Table 1. Spectral band specifications for MERSI and SeaWiFS
View tableTable 1. Spectral band specifications for MERSI and SeaWiFS
Instrument Band Central wavelength / μm Bandwidth / μm Spatial resolution / m 8 0.412 0.02 1000 9 0.443 0.02 1000 10 0.490 0.02 1000 11 0.520 0.02 1000 MERSI 12 0.565 0.02 1000 13 0.650 0.02 1000 14 0.685 0.02 1000 15 0.765 0.02 1000 16 0.865 0.02 1000 1 0.412 0.02 4000 2 0.443 0.02 4000 3 0.490 0.02 4000 SeaWiFS 4 0.510 0.02 4000 5 0.555 0.02 4000 6 0.670 0.02 4000 7 0.765 0.04 4000 8 0.865 0.04 4000
Table 2. RMSE of BRDF fitting for different bands over different sites
View tableTable 2. RMSE of BRDF fitting for different bands over different sites
Band RMSE of each site /% Algeria-3 Algeria-5 Libya-1 Libya-4 Mauritania-1 Mauritania-2 Band 1 2.014 1.907 1.952 1.201 2.501 2.730 Band 2 2.352 2.282 2.103 1.098 2.815 3.136 Band 3 2.615 2.430 2.046 1.154 2.800 3.216 Band 4 2.324 2.187 1.881 1.109 2.537 2.935 Band 5 1.600 1.610 1.489 1.147 1.967 2.055 Band 6 0.992 1.031 0.833 0.920 1.445 1.480 Band 7 1.003 1.021 0.840 0.912 1.365 1.379 Band 8 1.176 1.067 0.895 0.990 1.408 1.397
Table 3. Simulation condition of MODTRAN
View tableTable 3. Simulation condition of MODTRAN
Simulation condition Content Surface Desert Aerosol model Desert Solar zenith angle /(°) 0 to 60(step: 15) Viewing zenith angle /(°) 0 to 60(step: 10) Relative azimuth angle /(°) 0 to 180(step: 36) Total water vapor content /(g·cm-2) 0 to 5.0(step: 1.0) Total ozone content /(DU) 0 to 400(step: 100)
Table 4. SBAF model parameters for nine spectral channels
View tableTable 4. SBAF model parameters for nine spectral channels
Parameter Band 8 Band 9 Band 10 Band 11 Band 12 Band 13 Band 14 Band 15 Band 16 P1 1.704638 1.2734834 1.084228 2.273839 2.654799 1.286987 1.818853 1.071687 1.076728 P2 -1.0202 -0.3986542 -0.12324 -1.78536 -2.28282 -0.24861 -0.99434 -0.06433 -0.07037 P3 0.575016 0.21967103 0.069109 0.989652 1.251265 0.127415 0.543227 0.08658 0.057175 P4 -0.14385 -0.0531473 -0.01697 -0.23772 -0.29688 -0.02819 -0.12874 -0.02126 -0.00996 P5 0.013054 0.00468685 0.001506 0.020599 0.025414 0.002171 0.010725 0.015286 0.038343 P6 -0.0828 -0.5411471 -0.21492 0.340805 1.092247 0.015543 3.770866 -0.03278 -0.02993 P7 0.08351 0.7806828 0.308001 -0.53791 -1.62312 -0.0736 -5.38317 0.009528 0.005455 P8 -0.04019 -0.4158658 -0.16288 0.303555 0.877055 0.055358 2.83456 0.00017 -0.0086 P9 0.005171 0.0960645 0.037296 -0.07609 -0.20681 -0.01846 -0.64397 0.004814 0.006614 P10 -4.8×10-5 -0.0081476 -0.00314 0.006858 0.017685 0.00187 0.053729 -0.00176 -0.00123 P11 -0.00024 0.000677 P12 -0.00022 -0.00052 P13 0.000114 9.82×10-5
Table 5. Bias between parameterized and simulated SBAFs
View tableTable 5. Bias between parameterized and simulated SBAFs
Band Bias mean RMSE /% Bias max Bias min Band 8 0.0109 1.0427 2.5898 -3.1593 Band 9 0.0004 0.2032 0.5175 -0.5880 Band 10 0.0001 0.1185 0.2919 -0.3660 Band 11 0.0053 0.7315 2.3717 -2.0748 Band 12 0.0063 0.8013 2.8750 -2.5399 Band 13 0.0206 1.4304 4.6135 -4.7072 Band 14 0.0194 1.3905 5.6749 -5.3018 Band 15 0.0076 0.8846 8.7129 -2.3706 Band 16 0.0011 0.3377 2.4990 -0.9414
Table 6. FY-3B MERSI calibration coefficient
View tableTable 6. FY-3B MERSI calibration coefficient
Band k0 k1 Band 8 -1.7816 0.02002 Band 9 -2.5908 0.02008 Band 10 -2.7469 0.0202 Band 11 -1.9051 0.02005 Band 12 -3.2241 0.02015 Band 13 -2.0301 0.0203 Band 14 -2.4053 0.02021 Band 15 -2.0037 0.02024 Band 16 -2.4507 0.02042
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Xingwei He, Qi Han, Xiaohu Feng, Ning Kang. Calibration Accuracy Evaluation of Visible and Near-Infrared Bands of FY-3B MERIS[J]. Acta Optica Sinica, 2020, 40(18): 1828001
Paper Information
Category: Remote Sensing and Sensors
Received: May. 14, 2020
Accepted: Jun. 3, 2020
Published Online: Aug. 31, 2020
The Author Email: Han Qi (hexingwei@cma.gov.com)
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