U.S. flag
      An official website of the United States government, Department of Justice.
        Here's how you know
      Here's how you know**Official websites use .gov**
            
            A **.gov** website belongs to an official government organization in the United States.
      **Secure .gov websites use HTTPS**
            
            A **lock** (
            A locked padlock
            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Menu

      
        close

            
            
                                              About NIJ
        
                    
  
          About NIJ
      
    
          The NIJ Director
          How NIJ Is Organized
          Mission and Guiding Principles
          Research and Development Process
          Strategic Framework
          Assessments of NIJ
          Annual Reports & Reports to Congress
          Staff Directory
          Funding & Awards
        
                    
  
          Funding & Awards
      
    
          Current Funding
          Forthcoming Funding
          Expired Funding
          Awards: Listing of Funded Projects
          Guidance for Applicants and Awardees
          Fellowship & Student Programs
          Travel Scholarships
          NIJ Challenge Program
          Library & Multimedia
        
                    
  
          Library & Multimedia
      
    
          NIJ Journal
          Podcasts
          Publications Listing
          Multimedia Listing
          Rated Practices on CrimeSolutions
          Rated Programs on CrimeSolutions
          Software & Databases
          Datasets
          Patents
          Topics
        
                    
  
          Topics
      
    
          Article Listing
          Corrections
          Courts
          Crime Prevention
          Crimes
          Drugs and Crime
          Equipment and Technology
          Forensic Sciences
          Youth Justice
          Justice System Reform
          Law Enforcement
          Tribal Crime and Justice
          Victims of Crime
          Events
        
                    
  
          Events
      
    
          NIJ 2024 Research Conference
          Scheduled Events
          On-Demand Events
          Research Meetings & Workshops
          NIJ-Hosted Online Training

                            
                                About
          Contact Us
          Subscribe
          Topics A-Z
                  Share
FacebookXLinkedInRedditPinterestEmail Home
                            Library & Multimedia
 Through-the-Wall Sensors (TTWS) for Law Enforcement: Test & Evaluation (Version 1.2)
NCJ Number
              245944

Author(s)
          Dr. Chad Huffman;
                        Jon Hayes;
                        Dr. Lars Ericson
Date Published

March 2014
Length
              123 pages
Annotation
              This report presents the procedures and results of the testing and evaluation of commercially available through-the-wall sensors (TTWS) conducted by the National Institute of Justice (NIJ) Sensors and Surveillance Center of Excellence, along with a NIJ-sponsored TTWS prototype with standoff (SO) detection capabilities.
Abstract
              The four devices tested and evaluated on performance and usability were the Range-R by L-3 Communications; Xaver 100 by Camero-Tech Ltd.; Xaver 400 by Camero-Tech Ltd.; and the AKELA Standoff Through-wall Imaging Radar (ASTR) by AKELA (NIJ prototype). Overall, each device displayed strengths and weaknesses in different areas of evaluation. The Range-R and the Xaver 100 were the smallest and easiest to handle during storage, transport, and use. During "Against the Wall" (ATW) testing, in which the tested device was placed directly against a barrier, the Xaver 400 was superior at target detection; and the ASTR (NIJ prototype) was superior when setting up the device at a distance from the barrier (SO); however, the ASTIR was the only SO device tested. There were six key observations. First, larger devices tend to have more antennas and better signal processing capabilities, which improve detecting and locating targets. Second, smaller devices are more easily stored, transported, and used with a minimum of encumbrance to the operator. Third, the Xaver 400 had the best overall percent detection of the ATW devices; but is the largest and heaviest of the ATW devices; the Range-R and the Xaver 100 are more easily stored, transported, and handled. Fourth, the ASTIR is a prototype device and is the largest and most encumbering of the devices tested. Each device has strengths and weaknesses between detection, operation, and supporting activities, such as repositioning the device at the scene. Testing was done using seven different types of barrier (wall) materials. 68 tables, 50 figures, and 10 references
      
  
          Additional Details
Grant Number(s)
        2010-IJ-CX-K024


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Test/Measurement
                                Report (Study/Research)


  
  
        
  Award
        Sensor, Surveillance, and Biometric Technologies Center of Excellence
    
  
  
Date Published: March 1, 2014
    
          Downloads
        
                      PDF

Side navigation
  

        

  
  
              NIJ Journal
    
      
            
            
            
      Podcasts
    
      
            
            
            
      Publications Listing
    
      
            
            
            
      Multimedia Listing
    
      
            
            
            
      Rated Practices on CrimeSolutions
    
      
            
            
            
      Rated Programs on CrimeSolutions
    
      
            
            
            
      Software & Databases
    
      
            
            
            
      Datasets
    
      
            
            
            
      PatentsRelated Topics
        
                Building searches
        Evaluation
        Justice system
        Law enforcement
        NIJ Grant-related Documents



  
Similar Publications
        
                      Policies and practices in cold cases: an exploratory study
                  Differentiation of Structurally Similar Phenethylamines via Gas Chromatography-Vacuum Ultraviolet Spectroscopy (GC-VUV)
                  Strontium Isotope Ratios of Human Hair Record Intra-City Variations in Tap Water Source
 Top

      National Institute of Justice

        
        
                        About NIJ
                    About NIJ
      
    
                  How NIJ Is Organized
      
    
                  NIJ Director
      
    
                  Research Disclaimer
      
    
                  Funding & Awards
                    Funding & Awards Home
      
    
                  Awards Listing
      
    
                  Current Funding
      
    
                  Guidance for Applicants and Awardees
      
    
                  Resources
                    Events
      
    
                  Podcasts
      
    
                  Publications
      
    
                  Topics
      
    
                  Multimedia
      
    
                  Reuse Policy
      
    
                  Contacts
                    Contact NIJ
      
    
                  Staff Directory
      
    
                  Submit a FOIA Request
      
    
                  File a Civil Rights ComplaintFacebook
          
                      X
          
                      YouTube
  

      810 7th St. NW, Washington, D.C. 20531
      
              Secondary Footer link menu
            Accessibility
              Plain Language
              Privacy Policy
              Legal Policies and Disclaimer
              No FEAR Act
              Freedom of Information Act
              USA.gov
              Justice.gov