Time (second)

100

200

400

800

1000

2000

4000

The measured σv

4.85E−12

5.00E−12

6.10E−12

8.22E−12

9.30E−12

1.41E−11

1.99E−11

The needed σv

2.65E−11

1.32E−11

6.63E−12

3.31E−12

2.65E−12

1.32E−12

6.63E−13