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United States Department of TransportationUnited States Department of Transportation

System for Assessing Aviation's Global Emissions (SAGE) incorporated into the Aviation Environmental Design Tool (AEDT)

SAGE was a high fidelity computer model used to predict aircraft fuel burn and emissions for all commercial (civil) flights globally. The model was used to analyze scenarios from a single flight to airport, country, regional, and global levels. In addition, SAGE dynamically modeled aircraft performance, fuel burn and emissions.

The United States Federal Aviation Administration (FAA) Office of Environment and Energy (AEE) developed SAGE with support from the Volpe National Transportation Systems Center (Volpe), the Massachusetts Institute of Technology (MIT) and the Logistics Management Institute (LMI). Its purpose was to provide FAA, and indirectly the international aviation community, with a tool to evaluate the effects of various policy, technology, and operational scenarios on aircraft fuel use and emissions. Concluded at Version 1.5, SAGE was not developed for use on a stand alone personal computer; it was an FAA government research tool. Results from the model were made available to the international aviation community.

Aircraft Fuel Burn and Emissions Analysis

The SAGE tool has been incorporated into the Aviation Environmental Design Tool (AEDT), which dynamically models aircraft performance in space and time to produce fuel burn, emissions and noise. Additional information on AEDT is available.. The aircraft performance algorithms, emissions and fuel burn calculations, and validated methodologies found in the SAGE model have been improved, assessed for the probabilistic uncertainty effects, and fully incorporated into FAA's AEDT model.

SAGE Inventory Data

SAGE Version 1.5 was used to generate global inventories of fuel burn and emissions for years 2000 through 2004. These historical inventories were developed by modeling high-resolution gate-to-gate movements of all global commercial flights in each year. The inventory report files (listed below) present the data in various forms and also provide derivative metrics and comparative assessments. Note that the inventory data presented represents condensed (e.g., aggregated) versions of the raw inventory outputs from SAGE, which range from inventories with tens of millions of records to those with approximately a billion records of detailed flight results for each modeled year. As a formal disclaimer, any SAGE data, including those contained in this report, are made available to interested parties as is; FAA is not liable for any misunderstandings and misuses of the data. The user is solely responsible for any consequences arising from inappropriate application of the data.

SAGE Documents

As part of SAGE development and reporting, a series of documents (listed below) were developed to document the model's: methods, assumptions, validation and revision history. This information is provided within the context of using SAGE to develop global inventories of fuel burn and emissions.

  • Methods and assumptions
  • Validation
  • Revision history

The information is provided within the context of using SAGE to develop global inventories of fuel burn and emissions.

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