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

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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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Presentation Transcript
root causes
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

slide6

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

slide7

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

slide11

Scattering angle~46

Scattering angle~111

slide12

Surface=0.05

GOES Ch1 TOA reflectance

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