An Improved Vertical Seismometer with Build-in Retroreflector

A classical absolute gravimeter is widely used to measure the gravitational acceleration, normally known as g. It applies a Mach-Zehnder interferometer to track a free-falling retroreflector in a vacuum chamber. Theoretically, it needs a static reference retroreflector in an inertial frame. Practically, the reference retroreflector is always disturbed by the ground vibration. Vibration correction methods apply the seismometer output to calculate...