1.Previous
3.Next

effects of perturbing forces such as residual air resistance (even in a vacuum), vibration, and magnetic forces. Such instruments are capable of an accuracy of about 2 ppb or 0.002 mGal and reference their measurement to atomic standards of length and time. Their primary use is for calibrating relative instruments, monitoring crustal deformation, and in geophysical studies requiring high accuracy and stability. However, absolute instruments are somewhat larger and significantly more expensive

1.Previous
3.Next