当反射界面倾斜时,各迭加道的反射波信号并非来自同一个反射点,随着炮检距的增大,其相应的反射点向界面上倾方向偏移。另一方面,经动校正后不同炮检距的各迭加道之间仍存在着一个剩余校正时差。由于这些因素的存在,将影响一般水平迭加的效果。为了压制多次波,多次覆盖的观测系统往往使用大偏移距,大道距,这样最大炮检 When the reflection interface is tilted, the reflected signals of each superimposed path do not come from the same reflection point. As the offset increases, the corresponding reflection points shift to the upward inclination of the interface. On the other hand, there is still a residual correction time difference between the superimposed traces of different offset after dynamic correction. Because of these factors, will affect the general level of superposition effect. In order to suppress multiple waves, multiple coverage of the observation system often uses a large offset, the road distance, such a maximum gun inspection