- #1
Ulysees
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We can measure gravity gradients quite accurately with a pendulum: just take two measurements of the period at different places, and their inverse ratio is the gravity ratio along the vertical axis. So if there's a large cave underneath, our pendulum will be a little slower as we get closer to the cave.
But to do this we have to acount for the noise due to density variations of rock.
Anyone know how large those variations are?
But to do this we have to acount for the noise due to density variations of rock.
Anyone know how large those variations are?