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  • 1
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    Compensating Differentials for Shift Work (1990)
    University of Chicago Press
    Details
    Publication Date: 1990-10-01
    Print ISSN: 0022-3808
    Electronic ISSN: 1537-534X
    Topics: Economics
    Published by University of Chicago Press
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    PAPER CURRENT
  • 2
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    Reduction of Weather-Related Terminal Area Delays in the Free-Flight Era (1996)
    In:  CASI
    Details
    Publication Date: 2018-06-05
    Description: While much of the emphasis of the free-flight movement has been concentrated on reducing en-route delays, airport capacity is a major bottleneck in the current airspace system, particularly during bad weather. According to the Air Transport Association (ATA) Air Carrier Delay Reports, ground delays (gate-hold, taxi-in, and taxi-out) comprise 75 percent of total delays. It is likely that the projected steady growth in traffic will only exacerbate these losses. Preliminary analyses show that implementation of the terminal area technologies and procedures under development in NASA s Terminal Area Productivity program can potentially save the airlines at least $350M annually in weather-related delays by the year 2005 at Boston Logan and Detroit airports alone. This paper briefly describes the Terminal Area Productivity program, outlines the costhenefit analyses that are being conducted in support of the program, and presents some preliminary analysis results.
    Keywords: Air Transportation and Safety
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Estimating the Effects of the Terminal Area Productivity Program (1997)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The report describes methods and results of an analysis of the technical and economic benefits of the systems to be developed in the NASA Terminal Area Productivity (TAP) program. A runway capacity model using parameters that reflect the potential impact of the TAP technologies is described. The runway capacity model feeds airport specific models which are also described. The capacity estimates are used with a queuing model to calculate aircraft delays, and TAP benefits are determined by calculating the savings due to reduced delays. The report includes benefit estimates for Boston Logan and Detroit Wayne County airports. An appendix includes a description and listing of the runway capacity model.
    Keywords: Aeronautics (General)
    Type: NASA-CR-210682 , NAS 1.26:201682 , LMI-NS301T3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    An Integrated Safety Analysis Methodology for Emerging Air Transport Technologies (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: The continuing growth of air traffic will place demands on NASA's Air Traffic Management (ATM) system that cannot be accommodated without the creation of significant delays and economic impacts. To deal with this situation, work has begun to develop new approaches to providing a safe and economical air transportation infrastructure. Many of these emerging air transport technologies will represent radically new approaches to ATM, both for ground and air operations.
    Keywords: Aeronautics (General)
    Type: NASA/CR-1998-207661 , NAS 1.26:207661 , NS605S1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    A Small Aircraft Transportation System (SATS) Demand Model (2001)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: The Small Aircraft Transportation System (SATS) demand modeling is a tool that will be useful for decision-makers to analyze SATS demands in both airport and airspace. We constructed a series of models following the general top-down, modular principles in systems engineering. There are three principal models, SATS Airport Demand Model (SATS-ADM), SATS Flight Demand Model (SATS-FDM), and LMINET-SATS. SATS-ADM models SATS operations, by aircraft type, from the forecasts in fleet, configuration and performance, utilization, and traffic mixture. Given the SATS airport operations such as the ones generated by SATS-ADM, SATS-FDM constructs the SATS origin and destination (O&D) traffic flow based on the solution of the gravity model, from which it then generates SATS flights using the Monte Carlo simulation based on the departure time-of-day profile. LMINET-SATS, an extension of LMINET, models SATS demands at airspace and airport by all aircraft operations in US The models use parameters to provide the user with flexibility and ease of use to generate SATS demand for different scenarios. Several case studies are included to illustrate the use of the models, which are useful to identify the need for a new air traffic management system to cope with SATS.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/CR-2001-210874 , NAS 1.26:210874 , LMI-NS004S1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    A Method for Making Cross-Comparable Estimates of the Benefits of Decision Support Technologies for Air Traffic Management (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: We present a general method for making cross comparable estimates of the benefits of NASA-developed decision support technologies for air traffic management, and we apply a specific implementation of the method to estimate benefits of three decision support tools (DSTs) under development in NASA's advanced Air Transportation Technologies Program: Active Final Approach Spacing Tool (A-FAST), Expedite Departure Path (EDP), and Conflict Probe and Trial Planning Tool (CPTP). The report also reviews data about the present operation of the national airspace system (NAS) to identify opportunities for DST's to reduce delays and inefficiencies.
    Keywords: Aeronautics (General)
    Type: NASA/CR-1998-208455 , NS710S1 , NAS 1.26:208455
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Integrating LMINET with TAAM and SIMMOD: A Feasibility Study (2001)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: LMINET is a queuing network air traffic simulation model implemented at 64 large airports and the entire National Airspace System in the United States. TAAM and SIMMOD are two widely used air traffic event-driven simulation models mostly for airports. Based on our proposed Progressive Augmented window approach, TAAM and SIMMOD are integrated with LMINET though flight schedules. In the integration, the flight schedules are modified through the flight delays reported by the other models. The benefit to the local simulation study is to let TAAM or SIMMOD take the modified schedule from LMINET, which takes into account of the air traffic congestion and flight delays at the national network level. We demonstrate the value of the integrated models by the case studies at Chicago O'Hare International Airport and Washington Dulles International Airport. Details of the integration are reported and future work for a full-blown integration is identified.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/CR-2001-210875 , NAS 1.26:210875 , LMI-NS008S1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    A Method for Forecasting the Commercial Air Traffic Schedule in the Future (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: This report presents an integrated set of models that forecasts air carriers' future operations when delays due to limited terminal-area capacity are considered. This report models the industry as a whole, avoiding unnecessary details of competition among the carriers. To develop the schedule outputs, we first present a model to forecast the unconstrained flight schedules in the future, based on the assumption of rational behavior of the carriers. Then we develop a method to modify the unconstrained schedules, accounting for effects of congestion due to limited NAS capacities. Our underlying assumption is that carriers will modify their operations to keep mean delays within certain limits. We estimate values for those limits from changes in planned block times reflected in the OAG. Our method for modifying schedules takes many means of reducing the delays into considerations, albeit some of them indirectly. The direct actions include depeaking, operating in off-hours, and reducing hub airports'operations. Indirect actions include using secondary airports, using larger aircraft, and selecting new hub airports, which, we assume, have already been modeled in the FAA's TAF. Users of our suite of models can substitute an alternative forecast for the TAF.
    Keywords: Aeronautics (General)
    Type: NASA/CR-1999-208987 , NS806S1 , NAS 1.26:208987
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    A System for Integrated Reliability and Safety Analyses (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: We present an integrated reliability and aviation safety analysis tool. The reliability models for selected infrastructure components of the air traffic control system are described. The results of this model are used to evaluate the likelihood of seeing outcomes predicted by simulations with failures injected. We discuss the design of the simulation model, and the user interface to the integrated toolset.
    Keywords: Aeronautics (General)
    Type: NASA/CR-1999-209548 , NS805S1 , NAS 1.26:209548
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Modeling Air Traffic Management Technologies with a Queuing Network Model of the National Airspace System (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: This report describes an integrated model of air traffic management (ATM) tools under development in two National Aeronautics and Space Administration (NASA) programs -Terminal Area Productivity (TAP) and Advanced Air Transport Technologies (AATT). The model is made by adjusting parameters of LMINET, a queuing network model of the National Airspace System (NAS), which the Logistics Management Institute (LMI) developed for NASA. Operating LMINET with models of various combinations of TAP and AATT will give quantitative information about the effects of the tools on operations of the NAS. The costs of delays under different scenarios are calculated. An extension of Air Carrier Investment Model (ACIM) under ASAC developed by the Institute for NASA maps the technologies' impacts on NASA operations into cross-comparable benefits estimates for technologies and sets of technologies.
    Keywords: Aeronautics (General)
    Type: NASA/CR-1999-208988 , NAS 1.26:208988 , NS808S1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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