A communications time lag, which simulates what astronauts and ground controllers would experience during an actual mission at an asteroid, is part of the exercise.

通信时间差是这次训练的一部分，也是小行星上实际展开任务时宇航员和地面控制人员共同面临的问题。

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Communications between pilots and ground controllers are extremely important to air safety.

飞行员和地面控制器之间的通信是非常重要的对航空安全。

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Advanced hardware, intelligent inverters, digital controllers, and compatible communications will act as the enabling technology mix to maximize economic and operational benefits of both systems.

先进的硬件，智能逆变器，数字控制器和兼容的通信将作为有利的技术组合，以最大限度地提高系统的经济和运营效益。

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The flight tested the worldwide communications system that linked the spacecraft to flight controllers at Cape Canaveral.

VOA: special.2009.06.17

Initially, this might simply involve introducing a delay in communications to controllers in Moscow and Houston, US. Ultimately, it could also involve removing crew members into separate modules to give them a taste of what the Mars500 participants have gone through.

BBC: Simulated Mars mission 'lands' back on Earth

Air traffic controllers say the illegal radio broadcasts often block out vital communications with pilots.

BBC: Ofcom said there were 70 such cases in 2006

" The plane was handed off to controllers in Minneapolis as a NORDO, the designation for "no radio communications.

CNN: Airliner crew flies 150 miles past airport