Model

A₀

A₁

A₂

A₃

A₄

A₅

R²

Trapezoidal, α = 12˚

0.4731

2.8739

−17.689

40.762

−42.397

16.331

0.9823

Trapezoidal, α = 15˚

0.5175

2.5002

−15.434

36.535

−39.287

15.580

0.9664

Trapezoidal, α = 18˚

0.6117

1.0411

−7.3097

18.299

−21.211

8.9806

0.9631

Trapezoidal, α = 23˚

0.6343

1.0339

−5.7465

11.886

−11.710

4.3669

0.9419

Trapezoidal, α = 30˚

0.6901

0.7188

−5.7036

15.169

−17.800

7.5301

0.9320

Trapezoidal, α = 37˚

0.6870

1.0889

−7.8546

19.953

−22.336

9.1109

0.9284