May I ask: how sensitive?
Sensitive enough to, say, detect the movement of something moving at a known frequency on the other side of the planet?
Are we on the edge of gravitation based communication channels?
Sensitive enough to, say, detect the movement of something moving at a known frequency on the other side of the planet?
Are we on the edge of gravitation based communication channels?
Sensitive detectors can measure differences in hundreds of millionths (10^-8 parts) or around .1 um/s^2.
A 1 million tonne mass on the other side of the earth will create a TOTAL acceleration of 4*10^-16. Changes in that will not be detectable.
Depends on you application, but if you only send some bits of information ("stocks just crashed") having a big thumper with a very known impact profile is sufficient.
The more mass necessary, the more energy you'll need to send messages.
Unless the detection is extremely accurate, you would be better off spending that energy in electromagnetic radiation that bounces off the atmosphere.
https://physicsworld.com/a/neutrino-based-communication-is-a...