The Environmental Policy Teams helps develop and ensures that the latest noise and air quality impact evaluation tools are used in assessing environmental impacts of FAAs airspace projects.

Noise Models & Screening Tools

  • Aviation Environmental Design Tool (AEDT)
    • AEDT: Frequently Asked Questions
    • Approval of AEDT Plug-in within TARGETS for Environmental Screening (PDF, 91.0 KB)
    • AEDT 2a (released on June 29, 2012) is a runway-to-runway tool that replaces the legacy tool Noise Integrated Routing System (NIRS - regional noise analysis).
      • Local, Regional, and Global Analysis
        • Ability to evaluate noise and emissions interdependencies
        • Part of larger environmental suite including the Environmental Design Space (EDS) and Aviation Portfolio Management Tool (APMT)
      • Incorporates the following legacy tools:
        • Integrated Noise Model (INM) - local noise
        • Emissions and Dispersion Modeling System (EDMS) local emissions
        • Model for Assessing Global Exposure to Noise from Transport Airplanes (MAGENTA) - global noise
        • System for assessing Aviation Global Emissions (SAGE) - global emissions
        • Noise Integrated Routing System (NIRS) - regional noise
  • Integrated Noise Model (INM)
    • Usually used for a single airport
    • Generally used within the airport environment (<3,000' AGL)
    • Over 200 aircraft in database
    • Average annual day configuration
    • Used to determine significant impacts
      • Increase in number of people above 65 DNL
      • 1.5 dB changes above 65 DNL
    • Produces noise contours
    • Lead technology for other models
  • Area Equivalent Method (AEM)
    • The screening Tool is based on INM methodology. Used for changes in aircraft type and number of operations
    • Produces % change in contour area
    • 17% or more change in contour area is equivalent to a 3dB increase in noise and may signal impact in noise sensitive area.
  • Noise Integrated Routing System (NIRS) Version 6.1
    • Uses INM aircraft database & computation modules
    • Used for large regional airspace changes involving multiple airports
    • Handles multiple airspace design configurations and alternatives
    • For changes at high altitude (>3,000 feet)
    • Analyzes change in noise exposure at population points
    • Used for CTAP, Potomac, & NY/ NJ/PHL
    • NIRS tool replaced by AEDT2a
  • NIRS Screening Tool (NST)
    • Replaced the Air traffic Noise Screening Model (ATNS)
    • Bases on NIRS methodology
    • Used of small number of route changes between 3,000 and 18,000 AGL
    • For changes involving:
      • Aircraft route
      • Aircraft altitude
      • Aircraft mix
      • Number of operations
      • Time of day
      • Operational procedures
  • TARGETS Noise Plug-in (Terminal Area Route Generation, Evaluation, and Traffic Simulation)
    • Integrates noise impact analysis into the procedure design process as early as possible
    • Utilizes TARGETS airspace design elements for rapid scenario development
      • Airport, runway, waypoint, NAVAID data
      • Radar data in multiple formats
      • Import/export capabilities (INM/NIRS/GIS)
    • Allows iterative route design considering potential environmental impacts
    • Allows user to run INM 7.0 batch processor from within TARGETS
    • Approved for noise screening analysis by FAA Office of Environment and Energy
    • Currently available to FAA environmental specialists and beta testers while determining formal licensing/distribution process

Air Quality Models & Screening Tools