GPS signals are relatively weak and easy to jam.

GPS信号相对较弱，也易于阻塞。

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This altered the propagation of GPS signals and slowed the rate of decay of space debris in low Earth orbit.

这样就改变了GPS信号的传播，减小了地球底层轨道上空间碎块的衰减速度。

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According to the characteristics of GPS signals, the jamming power and effective jamming range are analyzed.

针对GPS信号的特点，分析了压制式干扰信号功率与干扰距离之间的关系。

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Then on July 18 two condors flew near the site and possibly directly over it, according to their GPS signals.

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But they often rely on RF signals from wi-fi access points or custom infrastructure, poor-quality GPS signals or expensive, high-quality sensors.

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However, GPS signals can fail or be fooled by a conflicting radio signal, said Professor David Last, an advisor to the to General Lighthouse Authority.

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