OK, you are referring to the gravitational field just inside the mass as near field. I was thinking about something like the near EM field.
On Tue, Dec 13, 2011 at 12:46 AM, <[email protected]> wrote: > > Folks, > > > > Actually, the USGS goes around measuring the local gravitational > > constant in various places. There was a gravimeter set up in the > > basement of one of the local universities a few years back doing just > > that. And some time ago, the U.S. spent a fair amount of time, money > > and effort (presumably as did the Soviet Union and others) mapping > > the Earth's external gravitational field to correct for its effect on > > ballistic missile trajectory. Probably still do. > > > > Francis > > Your intertial naviation systems accelerometers will always sense gravity. > The INS computations will need to substract the local gravity vector > before integrating acceleration to velocity and then position. This > becomes very critical for high accuracy applications where GPS is either > not available (submarines) or ICBMs which should work even with GPS > knocked down. > > This is a reason to map gravity anomalies. > > -- > > Björn > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
