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Linear Regression

Linear Regression graph

Figure B. Linear fitting for monthly gauge and TRMM 3B43 rain rate (unit: mm/day) versus GPCC; Oklahoma from January 1998 to November 2003.

Algorithm (X)ab
3B420.580.540.68
3B431.020.240.83
TMI0.331.440.39
TPR0.381.180.41
TCI0.421.070.45

Table 2. Regression analysis for TRMM algorithms with the gauge measurements for Oklahoma (1998-2003). Regression form CD = a X + b, Degrees of freedom = 69

 SummerWinter
Algorithm  (a,          b         [r²])  (a,         b         [r²])
3B420.69,    -0.02       [0.83]0.50,     0.54       [0.68]
3B431.10,     0.09       [0.96]0.89,     0.21       [0.96]
TMI0.37,     0.74       [0.44]0.89,    0. 99      [0.33]
TPR0.36,     1.11       [0.29]0.41,     0.93       [0.51]
TCI0.43,     0.97       [0.35]0.43,     0.80       [0.61]
GPCC1.19,     0.08       [0.97]1.13,     0.14       [0.97]

Table 3. Regression analysis for TRMM algorithms and GPCC with the gauge measurements for Oklahoma (1998-2003) for summer and winter.

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