Size of MNT (km*km)

Method of integration of Xi and Eta

Dispersion (10−2 m)

Gap with total MNT (10−3 m)

8*8

1.138

3.863

10*10

1.315

2.032

15*15

1.392

0.972

20*20

1.418

0.576

25*20

0.985

0.524