gradiometer

With the invention of high-temperature-superconductor, the superconductive magnetic gradiometer be-comes available in application.

由于高温超导体研究功，使得超导磁梯度仪实际应现实。

Gravity gradient is the second order derivative of gravitational potential, which can be observed by satellite gradiometer.

摘要重梯度重阶导数，可以通过星载梯度仪进行观测。