Research on free-fall gravity gradiometer

我们研制了一种测量重力梯度的自由落体激光干涉仪，用于高灵敏度的飞行器大面积测量。在所研制的样机中，用激光干涉仪测量了两个高度差约为70 cm的物体之间的位移。我们已经证实了高速数据采集和微伽级的灵敏度。这一研究成果为矿产和石油勘探以及地球物理研究提供了实际应用。

We have developed a free-fall laser interferometer measuring gravity gradient to survey large area with high sensitivity using aircrafts. In the developed prototype apparatus, the displacement between two objects with about 70cm height difference is measured by a laser interferometer. We have confirmed the high speed data taking and sensitivity of micro Gal level. This research result opens a practical application to minerals and petroleum survey and geophysical research.