When we observe the sky-wave data by dynasonde, we find that observation data has some period during one day. We always says that the reason is the difference of electronic density. But when we find the some problem in the ground-wave, the reason as same as sky-wave. In this thesis, we will explain the variation caused by the background surrounding oscillation with ground-wave. The purpose of thesis is to use the ground-wave data measured by the circle antenna compare with the atmospheric data observed by WRF model.