Pendulum Instruments expands its portfolio of time and frequency measurement products with two new test sets: PicoTime and GPS PicoReference. PicoTime is used for frequency stability measurements, ...

Each time that energy pulse travels, it tends to push one clock's pendulum in time with the other. The experiment takes up to 18 hours or even days to run, because the clocks synchronize slowly.

If it had possessed no other property than that merely of vibrating against the earth's attraction, the pendulum would have been an immense improvement upon this state of things, because every ...