We investigate displacement measurements of up to 17 μm on a heterodyne laser interferometer laboratory model. The measurement error for small (up to 200 nm) linear displacements is found to be 270 pm at a 10-s averaging time. The results obtained can be used for developing a space laser interferometric system for the global Earth’s gravity field mapping.

中文翻译：

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用于空间重力测量项目开发的外差激光干涉仪实验室模型的特征

我们在外差激光干涉仪实验室模型上研究了高达 17 μm 的位移测量。发现小（最大 200 nm）线性位移的测量误差在 10 秒平均时间内为 270 pm。获得的结果可用于开发用于全球地球重力场测绘的空间激光干涉系统。