Underground cavities slightly alter the local gravitational " signature " in ways that may be detectable from airborne instruments called gravimeters.
32.
A "'gravimeter "'or gravitometer, is an instrument used in gravimetry for measuring the local gravitational field.
33.
A gravimeter is a type of accelerometer, except that accelerometers are susceptible to all vibrations including noise, that cause oscillatory accelerations.
34.
A "'gravimeter "'is an instrument used in gravimetry for measuring the local gravitational field of the Earth.
35.
Besides stability is also an important property of a gravimeter, as it allows the monitoring of gravity " changes ".
36.
Also, the moving parts of the gravimeter will be dampened, to make it less susceptible to outside influences such as vibration.
37.
Vening Meinesz then designed a new gravimeter, which the pendula of the same size hanging in a frame but moving in opposite phases.
38.
The most common design for a gravimeter for field work is a spring-based design; a spring that suspends an internal weight.
39.
Kater's pendulum is a compound pendulum that uses this property to measure the local acceleration of gravity, and is called a gravimeter.
40.
What would be the resolution achievable by an array of gravimeters used to survey talk ) 15 : 46, 28 September 2009 ( UTC)
