System and method for surveying underground density distributions
US6954698B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2003 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Apr 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for geographical surveying includes the steps of determining an observation grid comprising observation points above a solution volume in the ground; making gravitational measurements at the observation points over a survey area; compiling a matrix having elements relating a set of gravitational accelerations and gravity gradient values at the points to the mass values for volume elements in the solution volume; and calculating the three-dimensional density distribution of the volume under the survey area based on the gravitational measurements and the inverse of the matrix. By measuring the magnetic field and gradient at the observation points, the three-dimensional magnetic susceptibility distribution of the volume under the survey area can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.