philippeb8
Muse
- Joined
- Sep 23, 2018
- Messages
- 914
Fed up with words I checked my iPhone on a concrete slab directly on the ground. The accelerometer noise is of the order of +/-3 parts in a thousand (so stable to about 1 part in a 100 or 0.01g) and the absolute difference in vertical g measurement between two iPhones is about the same. So the noise is 20,000 times greater than the signal (Sun’s tidal force at the Earth) that you are attempting to detect a change in.
What are you talking about? I already measured the ground noise early December 2nd with the exact same order of magnitude:
https://youtu.be/Yb5entzkaok