Some signals follow a short path and thus arrive quickly.

The signals each arrive at slightly different times, depending on the plane's trajectory.

Because the signals do not arrive at precisely the same time, they tend to interfere with one another.

The signal had arrived after the Sirrus's receipt of the bad news.

Yes, I know much of it does work and is done to improve whatever signal does eventually arrive at the house.

The signal would not arrive in time, before the California's situation became critical.

The two signals had arrived within twelve hours of one another.

Meanwhile, signals arrived from several returning members of the swarm.

Gurgeh was still thinking, even after the delayed signal arrived.

By the time a signal arrives on the Earths surface they are quite weak.