| B21&B31_last 30 days | Band20
   | RGB(20-31-32) | RGB(29-31-32) | 
| 2024-04-28+18h (GMT):   dT(B20-B31)= 5.55;   IQN = 476 | 
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| 2024-04-28+14h (GMT):   dT(B20-B31)= 5.6;   IQN = 395 | 
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| 2024-04-27+19h (GMT):   dT(B20-B31)= 2.8;   IQN = xx1051 | 
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| 2024-04-26+18h (GMT):   dT(B20-B31)= 4.39;   IQN = 38 | 
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| 2024-04-26+14h (GMT):   dT(B20-B31)= 10.55;   IQN = 74 | 
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| 2024-04-25+17h (GMT):   dT(B20-B31)= 8.95;   IQN = xx1127 | 
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| 2023-10-16+18h (GMT):   dT(B20-B31)= 1.07;   IQN = 267 | 
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| 2023-10-16+14h (GMT):   dT(B20-B31)= 2.53;   IQN = 390 | 
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| 2023-10-15+14h (GMT):   dT(B20-B31)= 2.81;   IQN = 697 | 
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| 2023-10-14+18h (GMT):   dT(B20-B31)= 1.66;   IQN = 132 | 
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| 2023-10-14+14h (GMT):   dT(B20-B31)= 3.28;   IQN = 828 | 
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| 2023-10-13+17h (GMT):   dT(B20-B31)= 1.44;   IQN = 976 | 
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| 2023-10-13+14h (GMT):   dT(B20-B31)= 3.08;   IQN = 259 | 
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| 2023-10-12+18h (GMT):   dT(B20-B31)= 1.77;   IQN = 532 | 
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| 2023-10-11+17h (GMT):   dT(B20-B31)= 1.22;   IQN = 578 | 
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| 2023-10-11+14h (GMT):   dT(B20-B31)= 2.07;   IQN = 196 | 
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| 2023-10-10+18h (GMT):   dT(B20-B31)= 0.22;   IQN = 932 | 
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| 2023-10-09+18h (GMT):   dT(B20-B31)= 74.77;   IQN = 180 | 
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| 2023-10-09+14h (GMT):   dT(B20-B31)= 72.58;   IQN = 634 | 
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| 2023-10-08+14h (GMT):   dT(B20-B31)= 1.71;   IQN = 454 | 
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| 2023-10-07+18h (GMT):   dT(B20-B31)= 1.39;   IQN = 216 | 
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| 2023-10-07+15h (GMT):   dT(B20-B31)= 3.87;   IQN = xx1071 | 
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| 2023-10-06+17h (GMT):   dT(B20-B31)= 1.44;   IQN = 896 | 
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| 2023-10-06+14h (GMT):   dT(B20-B31)= 1.99;   IQN = 16 | 
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| 2023-10-05+18h (GMT):   dT(B20-B31)= 0.61;   IQN = 612 | 
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| 2023-10-04+17h (GMT):   dT(B20-B31)= 1.16;   IQN = 498 | 
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| 2023-10-04+14h (GMT):   dT(B20-B31)= 1.37;   IQN = 420 | 
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| 2023-10-03+18h (GMT):   dT(B20-B31)= 1.9;   IQN = 1008 | 
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| 2023-10-03+14h (GMT):   dT(B20-B31)= 2.44;   IQN = 668 | 
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| 2023-10-02+18h (GMT):   dT(B20-B31)= 2.68;   IQN = 99 | 
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