There are two methods for the measurement of acoustic speed and attenuation coefficient, the first is measure after sample; the other is in-situ measurement.
海底表层沉积物声速和声衰减系数的测量方法主要有两种:取样测量和原位测量。
参考来源 - 海底底质声学性质及原位测量技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
在辐照过程中原位测量热控涂层的太阳吸收率参数。
The in-situ measurements for solar absorptance were carried out during irradiation.
采用原位测量的手段记录了辐照前后的光谱反射系数。
The spectral reflectance before and after irradiations of electrons was insitu measured.
在辐照前后对每一个试样的光谱反射系数进行了原位测量。
The spectral reflectance of each test specimen is measured in situ before and after exposures.
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