G: the greatest advances are probably still ahead
https://news.umich.edu/small-precise...g-without-gps/
The paper, “0.00016 deg/√hr angle random walk (ARW) and 0.0014 deg/hr bias instability (BI) from a 5.2M-Q and 1-cm precision shell integrating (PSI) gyroscope,” is scheduled to be presented at the (now virtual) 7th IEEE International Symposium on Inertial Sensors & Systems
https://2020.ieee-inertial.org/inert...rtual-platform