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Paper 24 -- Weather Index With Queuing Component For National Airspace System Performance Assessment

The impact of inclement weather – especially convective weather – on the National Airspace System (NAS) is a significant factor affecting NAS operational outcomes such as delays and user costs. It is important to develop objective measures of the combined impact of traffic demand and weather on the air traffic system. Previous efforts have led to the development of Weather Impacted Traffic Index (WITI) metric, a weighted sum of the en-route and terminal weather impact, which we have enhanced further by adding a queuing delay component. The three components are computed for OEP-35 airports on an hourly basis, allowing for a more in-depth analysis of operational impacts. This includes apportioning the impact of en-route convective weather to the affected airports (just as delays manifest themselves at airports). The new metric, the NAS Weather Index (NWX), has higher correlation with the ASPM Delay metric than earlier WITI versions. We have applied this methodology to the analysis of 2004-2006 NAS performance vis-à-vis operational impacts. The NWX metric can be produced on an hourly, daily or monthly basis, NAS-wide or regionalized. It is planned to be used for the FAA’s morning briefings, long-term post-season reviews, and future-NAS analyses. Future work includes developing methods for NAS outcome prediction based on weather forecast.
Theme: Active ATM Performance Management
Keywords: NAS, weather delays, Performance Measurement (or Metrics)
Posted by: Alexander Klein / Other authors: Richard Jehlen, Diana Liang
Note: Unset Received On Jan 24, 2007

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