altimeter

And that is where the altimeter stayed for most of the 14-hour journey..在14个小时旅途中的大部分时间里高度计都停留在那个位置。

Messenger has begun testing this theory by deploying a laser altimeter to map the shape of craters at the poles - with some encouraging results..信使号探测器已经开始用激光高度计来测量极地火山口德地形而且已经的除了一些让人振奋的结果。

The new probe was built using improved electronics and batteries, and an extra radar altimeter, a device that will fire microwaves at the Arctic and Antarctic ice to reveal its thickness..新的探测器在建造时使用了改进的电子设备和电池组，并且添加了新的的雷达高度计，这是一种发射微波测定两极冰层厚度的装置。

radar altimeter,雷达高度计

radio altimeter,无线电测高度计