Gravity Anomaly Over a Tunnel

This Java script will produce synthetic gravity anomalies over a buried tunnel. If there is nothing between the two horizontal lines shown below, you have a browser that does not support Java. In this case, you need to upgrade your Web browser to one that supports Java.

You can use this script to design a gravity survey for the project described in the request for bid. The red circle in the graph below represents a tunnel with a specific radius,R, depth of burial, and density contrast, rho. The depth of burial of the tunnel can be varied by clicking with the mouse on the tunnel and dragging the tunnel to different depths, the radius and density contrast can be varied with the slider bars. When dragging the tunnel, be sure to move the mouse slowly. If, as you are dragging, the mouse leaves the red circle, the tunnel will stop moving.

In addition to parameters that control the tunnel, you can also vary parameters that control gravity survey from which you will interpret observations. These parameters include the spacing between gravity readings, the number of gravity readings to be average at each station, and the expected standard deviation of the observed gravity readings.

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