Final Report - Strategic Environmental Research and Development ...

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Figure 18. Cole-Cole relaxation time distribution compared with model amplitude distributionfor a 2” diameter steel sphere. ....................................................................................................... 26Figure 19. Calculated 2 inch sphere response compared to Cole-Cole approximation. ............... 26Figure 20. Empirical decay time spectra for 60mm mortar (left) and exploded 4.2” mortar body(right). Top plots show Prony model fits to principal axis polarizabilities, bottom plots showcorresponding relaxation time distributions.................................................................................. 27Figure 21. Scatter plot of response strength vs. fundamental mode relaxation rate from Prony fitsto munitions and clutter polarizabilities. ....................................................................................... 28Figure 22. Ringdown for different TEMTADS receiver coils ...................................................... 29Figure 23. Observed TEMTADS background variation at several sites. ..................................... 29Figure 24. Signal and noise histograms at 0.1, 1.0 and 10 ms for the man-portable TEMTADS atCamp Beale. .................................................................................................................................. 30Figure 25. Classification performance using restricted decay time ranges. ................................. 31Figure 26. Run-on effect of shortened pulse length on target signature. ...................................... 32
List of AcronymsBUDDARPAEMIESTCPGEMMRNRLRxSAICSEMSERDPSLOSNRTxTEMTEMTADSUXOBerkeley UXO DiscriminatorDefense Advanced Research Projects AgencyElectromagnetic InductionEnvironmental Security Technology Certification ProgramGeophex Electromagnetic (sensor)Munitions ResponseNaval Research LaboratoryReceiveScience Applications International CorporationSingularity Expansion MethodStrategic Environmental Research and Development ProgramSan Luis ObispoSignal to Noise RatioTransmitTransient ElectromagneticTransient Electromagnetic Towed Array Discrimination SystemUnexploded Ordnance
Page 1 and 2: FINAL REPORTMagnetic Surface Modes
Page 3 and 4: AbstractThis research project conce
Page 5: List of TablesTable 1. MR-1595 targ
Page 9 and 10: AcknowledgementsThis project was a
Page 11 and 12: BackgroundIntroductionOver the past
Page 14 and 15: (11)V(t) = −μ 0 n R n T C R (r 0
Page 16 and 17: in blue. Finely spaced gray lines a
Page 18 and 19: Figure 5. Comparison of quadrature
Page 20 and 21: Although useful, these EMI signatur
Page 22 and 23: Materials and MethodsData Collectio
Page 24 and 25: Figure 9. (a) EMI response curves m
Page 26 and 27: have used the site for testing and
Page 28 and 29: ProjectilesMunition Type Variants M
Page 30 and 31: Figure 14. Principal axis polarizab
Page 32 and 33: transfer coefficient h according to
Page 34 and 35: around ½ depending on the object [
Page 36 and 37: We have considered the utility of u
Page 38 and 39: Figure 22. Ringdown for different T
Page 40 and 41: Figure 25. Classification performan
Page 42 and 43: Conclusions and Implications for Fu
Page 44: 13. James B. Kingdon, Bruce J. Barr

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