Search results
Results from the WOW.Com Content Network
A gravimeter is an instrument used to ... readings taken at locations with known absolute values of gravity. ... perturbing forces such as residual air resistance ...
The free-air correction adjusts measurements of gravity to what would have been measured at mean sea level, that is, on the geoid. The gravitational attraction of Earth below the measurement point and above mean sea level is ignored and it is imagined that the observed gravity is measured in air, hence the name.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
The gravity anomaly at a location on the Earth's surface is the difference between the observed value of gravity and the value predicted by a theoretical model. If the Earth were an ideal oblate spheroid of uniform density, then the gravity measured at every point on its surface would be given precisely by a simple algebraic expression.
is the free-air gravity anomaly. δ g B {\displaystyle \delta g_{B}} is the Bouguer correction which allows for the gravitational attraction of rocks between the measurement point and sea level; δ g T {\displaystyle \delta g_{T}} is a terrain correction which allows for deviations of the surface from an infinite horizontal plane
Gravity anomalies covering the Southern Ocean are shown here in false-color relief. Amplitudes range between −30 mGal (magenta) to +30 mGal (red). This image has been normalized to remove variation due to differences in latitude.
With that amount of air support, crews dropped more than 650,000 gallons of water on the fire from 8 a.m. Friday to 8 a.m. Saturday, Preader said — about half of which was dropped overnight ...
Pendulums used in Mendenhall gravimeter apparatus, from 1897 scientific journal. Gravity gradiometry is the study of variations in the Earth's gravity field via measurements of the spatial gradient of gravitational acceleration.