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

由于高温超体的研究功，使得超度仪的际应用。

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

摘要重力度重力位的二阶数，可以通过星载度仪进行观测。