radiometric

We also made some radiometric measurements to derive a more precise orbit.

我们还通过辐射测量的方法矫正了轨道，使之更加精确。

We also made some radiometric measurements to derive a more precise orbit. This should make it easier to contact Phobos-Grunt in future.

我们还通过辐射测量的方法矫正了轨道，使之更加精确。这有利于我们未来更加容易地与探测器取得联系。