Model

A₀

A₁

A₂

A₃

A₄

A₅

R²

Trapezoidal, α = 12˚

0.4598

2.8255

−17.296

40.718

−43.59

17.273

0.9799

Trapezoidal, α = 15˚

0.4600

3.4773

−19.171

42.242

−43.039

16.438

0.9848

Trapezoidal, α = 18˚

0.5638

2.1933

−12.876

29.283

−30.857

12.090

0.9738

Trapezoidal, α = 23˚

0.6417

0.9673

−4.0152

5.7463

−3.8338

0.8922

0.9608

Trapezoidal, α = 30˚

0.6395

1.5467

−8.3233

17.937

−18.184

6.9522

0.9620

Trapezoidal, α = 37˚

0.6537

1.6113

−8.6152

18.076

−17.719

6.5955

0.9790

Linear

0.6991

0.9370

−3.4166

2.4939

1.8340

-1.9528

0.9665