Distance h/m

True value (nGy/h)

Calculate by F(0, 0) (nGy/h)

Relative

error/%

7

413.667

414.986

0.319

6.5

486.667

476.004

−2.191

6

518.333

550.043

6.118

5.5

561.667

631.488

12.431

5

756.667

802.333

6.035

4.5

887.333

960.708

8.268

4

1022.000

1143.817

11.920

3.5

1337.333

1377.138

2.976

3

1807.333

1743.019

−3.559

θ = φ = 45˚

Distance h/m

True value (nGy/h)

Calculate by F(45, 45) (nGy/h)

Relative

error/%

7

169.371

160.194

−13.891