Originally Posted By: Orac

Quote:
Most common relative gravimeters are spring-based. They are used in gravity surveys over large areas for establishing the figure of the geoid over those areas. A spring-based relative gravimeter is basically a weight on a spring, and by measuring the amount by which the weight stretches the spring, local gravity can be measured.



Originally Posted By: Bill G
Typically an accelerometer uses 2 major components, a 'fixed' body and a sprung mass. The acceleration is calculated as the difference in location between the body and the sprung mass.



But you especially referenced a gravimeter that measured the acceleration of a mass in free fall. Stop trying to change the rules of the game in the middle.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.