1.   Banking, communications, and Internet enterprises relying on the GPS timing signal are disrupted.

2.   A relatively low-powered transmitter can overwhelm the weak timing signals broadcast by orbiting satellites.

3.   First, a show is recorded on special videotape embedded with timing signals.

4.   Instead, it operates about one week per month and is used to calibrate the timepieces that generate the timing signals that NIST transmits throughout the world.