Empirical Corrections to Dipole Model
Abstract
We successfully demonstrated an empirical approach for correcting errors in the standard Dipole Model of EMI response. The Dipole Model is accurate for small targets at relatively deep burial depths but it breaks down for larger targets at shallower depths because of the interaction between the target body and the spatially non-uniform primary field. Our approach was to calculate this interaction numerically for a large set of specific target-sensor geometries using the exe code developed in 2004 by Fridon Shubitidze and Irma Shamatava for a SERDP project, and then find empirical correction factors which adjust Dipole Model predictions to match the calculated results. The correction factors were assembled into a large look-up table, from which arbitrary target-sensor geometries can be queried through multi-linear interpolation. This approach is sensor-specific and target specific, but the results will indicate the seriousness of the corrections required, and it was originally thought that the results are likely to carry over to other geometries and scales.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2006
- Accession Number
- ADA469818
Entities
People
- Jonathan Miller
Organizations
- Leidos