The researcher used a Trimble CentrePoint RTX system that has a basic accuracy of 2cm. Great if you are building a road, not so accurate when calculating VGG T

The researcher used a Trimble CentrePoint RTX system that has a basic accuracy of 2cm. Great if you are building a road, not so accurate when calculating VGG The unit of gravity gradient is the eotvos (abbreviated as E), which is equivalent to 10−9 s−2 (or 10−4 mGal/m). A person walking past at a distance of 2 metres would provide a gravity gradient signal approximately one E. Mountains can give signals of several hundred Eotvos.