一些重力儀的資料

CG5 of Scintrex, photo credit: wikipedia.org

這裡有幾種重力儀的比較

• precision summary

FG5, absolute gravimeter, 0.1 microGal (6.25 hours)
gPhoneX, relative gravimeter, 1 microGal, good for long-term observations
CG5, relavite gravimeter, less than 5 microGal

• unit

1 Gal = 1 cm/s^2
1 m/s^2 = 0.01 cm/s^2 = 0.01 Gal

0.1 microGal = 1e-7 Gal = 1e-7 cm/s^2 = 1e-9 m/s^2
1    microGal = 1e-6 Gal = 1e-6 cm/s^2 = 1e-8 m/s^2
1    mGal = 1e-3 Gal = 1e-3 cm/s^2 = 1e-5 m/s^2

1 g = 980 cm/s^2 = 980 Gal = 9.8 m/s^2