| B21&B31_last 30 days | Band20
   | RGB(20-31-32) | RGB(29-31-32) | 
| 2024-04-28+18h (GMT):   dT(B20-B31)= 3.58;   IQN = 358 | 
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| 2024-04-28+14h (GMT):   dT(B20-B31)= 4.6;   IQN = 783 | 
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| 2024-04-27+18h (GMT):   dT(B20-B31)= 3.52;   IQN = xx1156 | 
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| 2024-04-27+13h (GMT):   dT(B20-B31)= 2.57;   IQN = 294 | 
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| 2024-04-26+18h (GMT):   dT(B20-B31)= 0.36;   IQN = 73 | 
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| 2024-04-25+17h (GMT):   dT(B20-B31)= 10.33;   IQN = 1012 | 
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| 2024-04-25+13h (GMT):   dT(B20-B31)= 9.66;   IQN = 162 | 
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| 2023-10-16+17h (GMT):   dT(B20-B31)= 3.18;   IQN = 153 | 
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| 2023-10-16+13h (GMT):   dT(B20-B31)= 6.72;   IQN = 1045 | 
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| 2023-10-15+14h (GMT):   dT(B20-B31)= 20.08;   IQN = 483 | 
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| 2023-10-14+18h (GMT):   dT(B20-B31)= 2.87;   IQN = 246 | 
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| 2023-10-14+13h (GMT):   dT(B20-B31)= 3.78;   IQN = 603 | 
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| 2023-10-13+17h (GMT):   dT(B20-B31)= 4.44;   IQN = 856 | 
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| 2023-10-13+14h (GMT):   dT(B20-B31)= 5.76;   IQN = 920 | 
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| 2023-10-12+18h (GMT):   dT(B20-B31)= 5.04;   IQN = 646 | 
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| 2023-10-12+13h (GMT):   dT(B20-B31)= 4.23;   IQN = 164 | 
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| 2023-10-11+17h (GMT):   dT(B20-B31)= 7.36;   IQN = 455 | 
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| 2023-10-10+18h (GMT):   dT(B20-B31)= 12.45;   IQN = 1047 | 
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| 2023-10-10+14h (GMT):   dT(B20-B31)= 5.76;   IQN = 274 | 
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| 2023-10-09+18h (GMT):   dT(B20-B31)= 4.6;   IQN = 55 | 
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| 2023-10-09+13h (GMT):   dT(B20-B31)= 3.02;   IQN = 810 | 
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| 2023-10-08+14h (GMT):   dT(B20-B31)= 3.92;   IQN = 722 | 
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| 2023-10-07+18h (GMT):   dT(B20-B31)= 1.75;   IQN = 319 | 
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| 2023-10-07+13h (GMT):   dT(B20-B31)= 4.1;   IQN = 364 | 
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| 2023-10-06+17h (GMT):   dT(B20-B31)= 2.96;   IQN = 783 | 
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| 2023-10-05+18h (GMT):   dT(B20-B31)= 22.65;   IQN = 716 | 
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| 2023-10-05+13h (GMT):   dT(B20-B31)= 16.02;   IQN = 76 | 
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| 2023-10-04+17h (GMT):   dT(B20-B31)= 9.8;   IQN = 385 | 
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| 2023-10-04+13h (GMT):   dT(B20-B31)= 24.35;   IQN = 1009 | 
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| 2023-10-03+18h (GMT):   dT(B20-B31)= 3.35;   IQN = xx1111 | 
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