“cross-over distance”的概念、定义、翻译、参考文献-科学参考

cross-over distance

Geology and Earth Sciences

The distance on a seismic refraction survey time–distance chart at which the travel times of the direct and refracted waves are the same. This distance also marks the point when the refracted wave overtakes, and thus arrives before, the direct wave. The cross-over distance is related to the refractor depth, h, and the velocities of the overlying medium and the refractor, V₁ and V₂ respectively, such that x_c = 2h[(V₂ + V₁)/(V₂ − V₁)]^½. The value of x_c will always be greater than twice the refractor depth.

单词	cross-over distance
释义	cross-over distance Geology and Earth Sciences The distance on a seismic refraction survey time–distance chart at which the travel times of the direct and refracted waves are the same. This distance also marks the point when the refracted wave overtakes, and thus arrives before, the direct wave. The cross-over distance is related to the refractor depth, h, and the velocities of the overlying medium and the refractor, V₁ and V₂ respectively, such that x_c = 2h[(V₂ + V₁)/(V₂ − V₁)]^½. The value of x_c will always be greater than twice the refractor depth.
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