黑障区

作为一次练习，估算了测控通信系统的工作频率、电波穿过黑障区的衰减常数；

As an example , the operation frequency of TT C and data transmission ( TTC DT ) and the attenuation constant of electromagnetic wave through the blackout zone are estimated .

你通过“黑障区”时是怎样的感受？

What does it feel like when you go through the black-out-area ?

返回舱弹道重建与黑障区弹道再现研究

Trajectory reconstruction and black-out - area trajectory makeup for reentry capsules of spacecraft

利用舱上测量数据和有限的雷达测量数据重构飞行弹道，是黑障区弹道再现的有效方法。

One of effective methods for this problem is to reconstruct flight trajectory employing the onboard measurement data and the limited radar data .

对于飞船返回舱，黑障区弹道再现是再入飞行试验气动分析工作的重要环节。

For reentry capsules of spacecraft , making up the trajectory in black-out area is a key link of aerodynamic analysis from flight test data .