IODP Expedition 400 P-wave velocity caliper (section)

P-wave velocity data were measured on undisturbed section halves (JRSO-defined x-axis) and/or discrete cube and cylinder samples (x, y, or z-axis) using pairs of piezoelectric transducers mounted on a caliper system. Report includes P-wave velocity in x, y, and/or z-direction, caliper separation, traveltime between transucers, and first arrival picks.本数据集所涉纵波速度（P-wave velocity）数据，系通过安装于卡尺系统的成对压电换能器（piezoelectric transducers）测得，测试对象涵盖以JRSO定义的x轴为基准的未扰动岩心半段，以及沿x、y或z轴方向的离散立方体与圆柱试样。本次提交的报告包含沿x、y及/或z方向的纵波速度、卡尺间距、换能器间旅行时以及初至拾取结果。