A storm is defined as a continuous region where the specified thresholds for both volumetric size and radar reflectivity are exceeded .

风暴的识别基于某个连续区域的 体积 和 雷达反射率大于给定的 体积阈值和反射率阈值；

We confirm the accuracy and applicability of the ground penetrating radar to be used to estimate mean volumetric water content in soil profile after radar wave velocity analysis .

分析 雷达波在土壤中传播速度的变化，明确基于探地雷达的土壤剖面平均 含水量测定方法的适用性和准确性。