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在多次复盖方法中,为了获得足够的剩余时差,往往采用较长的排列。因而在野外接收记录时,必须选用不同的仪器因素,尽可能地保证远近道反射波能量有均匀的振幅;回放处理时要求有比较大的动校正量。在普通反射法中,按近似方法求取各道动校正量的误差以及由动校正而引起反射波视周期随距离的变化,在多次复盖方法中均相应增大。这些因素是影响多次复盖叠加效果的主要原因,特别是对浅层资料叠加效果的影响尤为突出。
In the multiple cover method, in order to obtain sufficient residual time difference, a longer arrangement is often adopted. Therefore, when receiving records in the field, different instrumental factors must be selected to ensure that the amplitude of the reflected energy of the far-near road is uniform as much as possible; and that the larger dynamic correction amount is required for playback processing. In the ordinary reflection method, the approximate error of the correction of each path and the change of the period of the reflected wave as a function of distance caused by the moving correction increase correspondingly in the multiple covering methods. These factors are the main factors that affect the overlay effect of multiple overlays, especially the superposition effect of shallow data.