TheBitterEnd
Well-known member
Does anyone have any views/data on acceptable magnetometer noise for cave surveying? The reason I ask is I have been investigating the magnetometer in my phone and it is capable of repeatable results and exhibits next to no observable drift (tested by taking an average of a set of readings every 10 mins over 8 hours). However it seems to me to be pretty noisy, at about +/- 1.5o.
Here's a plot of a sample taken over about 10 secs
Here's a plot of a sample taken over about 10 secs