Anomaly Density Mapping: Lowry AGGR Site Demonstration Report

Abstract

The aim of this report is to show the methods and results of using the tools developed by Pacific Northwest National Laboratory (PNNL) and Sandia National Laboratory (SNL) for mapping the geophysical anomaly density at the Former Lowry Bombing and Gunnery Range (FLBGR) site located east of Denver, Colorado. PNNL and SNL have developed the tools under SERDP to support detection, delineation, density estimation, and mapping of unknown target areas where UXO are most likely. Some of the methods have been deployed via the Visual Sample Plan (VSP) software. The specific area analyzed is within the Air-to-Ground Gunnery Range (AGGR), which is approximately 3 square miles in size. In Phase 1 sampling of the AGGR, approximately 1/3 of the site was sampled. A three-coil EM-61 instrument was used to collect data along 20 transects running approximately east-to-west between two creek beds. Transects were 3 meters wide, and spaced approximately 200 feet apart from their centers. Figure 1 shows an aerial view of the AGGR with transect locations marked on the map. PNNL and SNL performed two different sets of analyses. In the first analysis, the full data set is used to create maps showing the anomaly density and the probability of any area in the site being above a threshold background value. In the second analysis, the data set is split into two data sets so that one data set contains the odd-numbered transects, and the other contains the even-numbered transects. This split of the data set allows for a jackknife analysis of the data where one data set is used to recreate the estimates made with the full data set, and the other data set is used to evaluate those estimates. Additionally, two different conceptual models of the spatial variation of the anomaly density are investigated.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2006
Accession Number
ADA603936

Entities

People

  • Brent Pulsipher
  • Brett Matzke
  • Sean A. Mckenna

Organizations

  • Sandia National Laboratories

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Cells
  • Confidence Limits
  • Coordinate Systems
  • Data Sets
  • Demonstrations
  • Detection
  • Diameters
  • Environmental Security
  • Frequency
  • High Density
  • Histograms
  • Normal Distribution
  • Omnidirectional
  • Orientation (Direction)
  • Spatial Distribution
  • Uxo Detection

Readers

  • Computational Modeling and Simulation
  • Environmental Remediation and Restoration.
  • Military/Explosive Ordnance Disposal (EOD) Technology

Technology Areas

  • Space