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Root causes analysis of the discrepancy in AOD Between GOES-EAST and WEST

Root causes analysis of the discrepancy in AOD Between GOES-EAST and WEST. Root Causes. 1. Calibration difference shouldn’t have diurnal dependency 2. Cloud detection difference 3. Surface reflectance 4. viewing geometry

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Root causes analysis of the discrepancy in AOD Between GOES-EAST and WEST

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  1. Root causes analysis of the discrepancy in AOD Between GOES-EAST and WEST

  2. Root Causes • 1. Calibration difference shouldn’t have diurnal dependency • 2. Cloud detection difference • 3. Surface reflectance • 4. viewing geometry • Sensitivity to AOD is reduced considerably when higher surface reflectance is combined with backward scattered direction, i.e., AM for EAST and PM for WEST eastwest

  3. 6.2 (72) 7.2 (61) 5.7 LST (sza=78) 9.2(38) 10.2(28) 12.2 (17) 13.2 (23) 15.7(50) 15.2 (44) Surface reflectance, RAZ=RAZ

  4. 6.2 (72) 7.2 (61) 5.7 LST (sza=78) 9.2(38) 10.2(28) 12.2 (17) 13.2 (23) 15.2 (44) 15.7(50) AOD , RAZ=RAZ

  5. Viewing geometry of GOES-EAST and WEST at Boulder (40N, 105W)

  6. Scattering angle~46 Scattering angle~111

  7. Surface=0.05 GOES Ch1 TOA reflectance

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