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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309087317
Category : Science
Languages : en
Pages : 67
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Book Description
Accurate prediction of convective storms 2- to 6-hours in advance is critical to selecting air traffic routes with minimal weather delays or diversions. This report summarizes the discussions of a workshop to explore present convective weather forecasting skill, strategies for improving that skill, ways to verify forecasts are accurate, and how to make forecasts useful to air traffic controllers, airline dispatchers, and pilots.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309087317
Category : Science
Languages : en
Pages : 67
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Book Description
Accurate prediction of convective storms 2- to 6-hours in advance is critical to selecting air traffic routes with minimal weather delays or diversions. This report summarizes the discussions of a workshop to explore present convective weather forecasting skill, strategies for improving that skill, ways to verify forecasts are accurate, and how to make forecasts useful to air traffic controllers, airline dispatchers, and pilots.
Author: David A. Powner
Publisher: DIANE Publishing
ISBN: 1437941168
Category : Nature
Languages : en
Pages : 35
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Book Description
This is a print on demand edition of a hard to find publication. The National Weather Service's (NWS) weather products are a vital component of the FAA¿s air traffic control system. In addition to providing aviation weather products developed at its own facilities, NWS also provides on-site staff at each of FAA's en route centers -- the facilities that control high-altitude flight outside the airport tower and terminal areas. NWS and FAA have been exploring options for improving the aviation weather services provided at en route centers. This report: (1) determines the status of the agencies' efforts to restructure aviation weather services; (2) assesses the agencies' progress in establishing performance baselines in order to measure the effect of any changes; and (3) evaluates plans to address key challenges. Ill.
Author: Diana Michalek Pfeil
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
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Book Description
Convective weather is responsible for large delays and widespread disruptions in the U.S. National Airspace System, especially during summer. Although Air Traffic Flow Management algorithms exist to schedule and route traffic in the face of disruptions, they require reliable forecasts of airspace capacity. However, there exists a gap between the spatial and temporal accuracy of aviation weather forecasts (and existing capacity models) and what these algorithms assume. In this thesis we consider the problem of integrating currently available convective weather forecasts with air traffic management in terminal airspace (near airports). We first demonstrate how raw convective weather forecasts, which provide deterministic predictions of the Vertically Integrated Liquid (the precipitation content in a column of airspace) can be translated into reliable and accurate probabilistic fore- casts of whether or not a terminal-area route will be blocked. Given a flight route through the terminal-area, we apply techniques from machine learning to determine the probability that the route will be open in actual weather. This probabilistic route blockage predictor is then used to optimize terminal-area operations. We develop an integer programming formulation for a 2-dimensional model of terminal airspace that dynamically moves arrival and departure routes to maximize expected capacity. Experiments using real weather scenarios on stormy days show that our algorithms recommend that a terminal-area route be modified 30% of the time, opening up 13% more available routes during these scenarios. The error rate is low, with only 5% of cases corresponding to a modified route being blocked while the original route is in fact open. In addition, for routes predicted to be open with probability 0.95 or greater by our method, 96% of these routes are indeed open (on average) in the weather that materializes. In the final part of the thesis we consider more realistic models of terminal airspace routing and structure. We develop an A*-based routing algorithm that identifies 3-D routes through airspace that adhere to physical aircraft constraints during climb and descent, are conflict-free, and are likely to avoid convective weather hazards. The proposed approach is aimed at improving traffic manager decision-making in today's operational environment.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721831777
Category :
Languages : en
Pages : 24
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Book Description
The Federal Aviation Administration (FAA) is handling nearly 120,000 flights a day through its Air Traffic Management (ATM) system and air traffic congestion is expected to increse substantially over the next 20 years. Weather-induced impacts to throughput and efficiency are the leading cause of flight delays accounting for 70% of all delays with convective weather accounting for 60% of all weather related delays. To support the Next Generation Air Traffic System goal of operating at 3X current capacity in the NAS, ATC decision support tools are being developed to create advisories to assist controllers in all weather constraints. Initial development of these decision support tools did not integrate information regarding weather constraints such as thunderstorms and relied on an additional system to provide that information. Future Decision Support Tools should move towards an integrated system where weather constraints are factored into the advisory of a Decision Support Tool (DST). Several groups such at NASA-Ames, Lincoln Laboratories, and MITRE are integrating convective weather data with DSTs. A survey of current convective weather forecast and observation data show they span a wide range of temporal and spatial resolutions. Short range convective observations can be obtained every 5 mins with longer range forecasts out to several days updated every 6 hrs. Today, the short range forecasts of less than 2 hours have a temporal resolution of 5 mins. Beyond 2 hours, forecasts have much lower temporal. resolution of typically 1 hour. Spatial resolutions vary from 1km for short range to 40km for longer range forecasts. Improving the accuracy of long range convective forecasts is a major challenge. A report published by the National Research Council states improvements for convective forecasts for the 2 to 6 hour time frame will only be achieved for a limited set of convective phenomena in the next 5 to 10 years. Improved longer range forecasts will be probabilistic a
Author: Yee-Chien Calvin Ying
Publisher:
ISBN:
Category :
Languages : en
Pages : 200
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Book Description
Author: United States. Federal Aviation Administration
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 250
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Book Description
Author: Steven I. Krich
Publisher:
ISBN:
Category : Meteorology in aeronautics
Languages : en
Pages : 124
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Book Description
The report summarizes the results of a study to: (1) investigate the primary needs of air traffic controllers, flow controllers, and central flow controllers for weather information, (2) define a cost effective system concept to meet these needs, and (3) lay out a plan for the development of the proposed weather subsystem to support Air Traffic Control. The recommended system will provide rapid generation and dissemination of reliable user oriented observations and very short range severe weather forecasts (up to 30 min.) to facilitate controller planning. This new capability will: (1) reduce weather induced controller work load peaks, (2) permit controllers to coordinate and preplan aircraft rerouting for weather avoidance, (3) achieve an improved balance between the inefficiency of overreaction and the essentials of safety, (4) facilitate controller response to pilot requests for weather data on a work load permitting basis, and (5) enable the issuance of accurate weather advisories. The system will also provide rapid generation and dissemination of reliable short range forecasts (up to 4 hours) to permit early introduction of necessary flow control procedures. This new capability will: (1) decrease problems for controllers, (2) increase acceptance of flow control, and (3) increase traffic flow efficiency without decreasing safety.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309176034
Category : Science
Languages : en
Pages : 119
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Book Description
Each time we see grim pictures of aircraft wreckage on a rain-drenched crash site, or scenes of tired holiday travelers stranded in snow-covered airports, we are reminded of the harsh impact that weather can have on the flying public. This book examines issues that affect the provision of national aviation weather services and related research and technology development efforts. It also discusses fragmentation of responsibilities and resources, which leads to a less-than-optimal use of available weather information and examines alternatives for responding to this situation. In particular, it develops an approach whereby the federal government could provide stronger leadership to improve cooperation and coordination among aviation weather providers and users.
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on the Departments of Transportation, Treasury, HUD, the Judiciary, District of Columbia, and Independent Agencies Appropriations
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 2364
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Book Description
Author: United States. Federal Aviation Administration
Publisher: Aviation Supplies & Academics
ISBN:
Category : Science
Languages : en
Pages : 412
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Book Description
Revised and updated, this new edition features full coverage of weather-related tools to assist every pilot’s flight planning and in-flight decisions. The reference thoroughly explains the many aviation weather products and services available to pilots and details the interpretation and application of advisories, coded weather reports, forecasts, observed and prognostic weather charts, and radar and satellite imagery. Weather product examples and explanations are taken primarily from the Aviation Weather Center’s Aviation Digital Data Service website. Including weather station location tables, lists of contractions and acronyms, weather symbols, conversion charts, internet links, and more, this greatly expanded and full-color edition should remain a part of every aviator’s library.
