$\Delta t$

$\alpha =1.2$

$\alpha =1.5$

$\alpha =1.8$

$\alpha =2.0$

Err_∞

Rate

Err_∞

Rate

Err_∞

Rate

Err_∞

Rate

S1

$\frac{1}{200}$

5.25E−06

-

5.69E−06

-

1.43E−06

-

1.52E−06

-

$\frac{1}{400}$

2.63E−06

0.99

2.85E−06

0.99

7.14E−07

1.01

7.57E−07

1.00

$\frac{1}{800}$

1.32E−06

1.00

1.43E−06

1.00

3.56E−07

1.00

3.78E−07

1.00

S2

$\frac{1}{200}$

2.11E−10

-

4.20E−10

-

3.25E−10

-

4.76E−10

-

$\frac{1}{400}$

5.34E−11

1.99

1.05E−10

2.00

8.12E−11

2.00

1.19E−10

2.00

$\frac{1}{800}$

1.34E−11

1.99

2.61E−11

2.00

2.03E−11

2.00

2.98E−11

2.00

S3

$\frac{1}{200}$

3.24E−11

-

3.43E−11

-

8.48E−12

-

9.09E−12

-

$\frac{1}{400}$

4.09E−12

2.99

4.32E−12

2.99

1.07E−12

2.99

1.14E−12

2.99

$\frac{1}{800}$

5.13E−13

2.99

5.43E−13

2.99

1.34E−13

3.00

1.44E−13

2.99