A Sensitivity Study of the Aircraft Vortex Spacing System (Avoss) Wake Predictor Algorithm to the Resolution of Input Meteorological Profiles
A Sensitivity Study of the Aircraft Vortex Spacing System (Avoss) Wake Predictor Algorithm to the Resolution of Input Meteorological Profiles

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-06-21

Total Pages: 34

ISBN-13: 9781721656592

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The AVOSS project demonstrated the feasibility of applying aircraft wake vortex sensing and prediction technologies to safe aircraft spacing for single runway arrivals. On average, AVOSS provided spacing recommendations that were less than the current FAA prescribed spacing rules, resulting in a potential airport efficiency gain. Subsequent efforts have included quantifying the operational specifications for future Wake Vortex Advisory Systems (WakeVAS). In support of these efforts, each of the candidate subsystems for a WakeVAS must be specified. The specifications represent a consensus between the high-level requirements and the capabilities of the candidate technologies. This report documents the beginnings of an effort to quantify the capabilities of the AVOSS Prediction Algorithm (APA). Specifically, the APA horizontal position and circulation strength output sensitivity to the resolution of its wind and turbulence inputs is examined. The results of this analysis have implications for the requirements of the meteorological sensing and prediction systems comprising a WakeVAS implementation. Rutishauser, David K. and Butler, Patrick and Riggins, Jamie Langley Research Center NASA/TM-2004-213239, L-18383

An Initial Study of the Sensitivity of Aircraft Vortex Spacing System (AVOSS) Spacing Sensitivity to Weather and Configuration Input Parameters
An Initial Study of the Sensitivity of Aircraft Vortex Spacing System (AVOSS) Spacing Sensitivity to Weather and Configuration Input Parameters

Author: Stephen E. Riddick

Publisher:

Published: 2000

Total Pages: 28

ISBN-13:

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A study has been performed on a computer code modeling an aircraft wake vortex spacing system during final approach. This code represents an intial engineering model of a system to calculate reduced approach separation criteria needed to increase airport productivity. This report evaluates model sensitivity toward various weather conditions (crosswind, crosswind variance, turbulent kinetic energy, and thermal gradient), code configurations (approach corridor option, and wake demise definition), and post-processing techniques (rounding of provided spacing values, and controller time variance).

Nwra Avoss Wake Vortex Prediction Algorithm. 3.1.1
Nwra Avoss Wake Vortex Prediction Algorithm. 3.1.1

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-09-20

Total Pages: 66

ISBN-13: 9781723865824

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This report provides a detailed description of the wake vortex prediction algorithm used in the Demonstration Version of NASA's Aircraft Vortex Spacing System (AVOSS). The report includes all equations used in the algorithm, an explanation of how to run the algorithm, and a discussion of how the source code for the algorithm is organized. Several appendices contain important supplementary information, including suggestions for enhancing the algorithm and results from test cases.Robins, R. E. and Delisi, D. P. and Hinton, David (Technical Monitor)Langley Research CenterALGORITHMS; PREDICTION ANALYSIS TECHNIQUES; WING TIP VORTICES; AIRCRAFT WAKES; AIRCRAFT APPROACH SPACING; COMPUTER PROGRAMS; SOURCE PROGRAMS; ARCHITECTURE (COMPUTERS)

Integrated Ground-Based Observing Systems
Integrated Ground-Based Observing Systems

Author: Domenico Cimini

Publisher: Springer Science & Business Media

Published: 2010-09-15

Total Pages: 310

ISBN-13: 3642129684

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The book is a collection of the lectures delivered during the 7th International Summer School on Atmospheric and Oceanic Sciences (ISSAOS) titled “Integrated Ground-Based Observing Systems Applications for Climate, Meteorology, and Civil Protection”. Its aim is to contribute to the scientific understanding of basic concepts and applications of integrated ground-based observing systems. The first part describes the most common instrumentations showing their strengths and limitations. Furthermore, strategic plans for the deployment of an observation site are discussed along with an overview of techniques for integrating heterogeneous data. The second part introduces cutting-edge applications, including assimilation in numerical weather prediction, climate benchmarking, air quality monitoring and meteo/hydrological warnings.

Synthesis of Subsonic Airplane Design
Synthesis of Subsonic Airplane Design

Author: E. Torenbeek

Publisher: Springer Science & Business Media

Published: 2013-06-29

Total Pages: 607

ISBN-13: 9401732027

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Since the education of aeronautical engineers at Delft University of Technology started in 1940 under tae inspiring leadership of Professor H.J. van der Maas, much emphasis has been placed on the design of aircraft as part of the student's curriculum. Not only is aircraft design an optional subject for thesis work, but every aeronautical student has to carry out a preliminary airplane design in the course of his study. The main purpose of this preliminary design work is to enable the student to synthesize the knowledge ob tained separately in courses on aerodynamics, aircraft performances, stability and con trol, aircraft structures, etc. The student's exercises in preliminary design have been directed through the years by a number of staff members of the Department of Aerospace Engineering in Delft. The author of this book, Mr. E. Torenbeek, has made a large contribution to this part of the study programme for many years. Not only has he acquired vast experience in teaching airplane design at university level, but he has also been deeply involved in design-oriented re search, e.g. developing rational design methods and systematizing design information. I am very pleased that this wealth of experience, methods and data is now presented in this book.

Aircraft Wake Vortex Spacing System (AVOSS) Performance Update and Validation Study
Aircraft Wake Vortex Spacing System (AVOSS) Performance Update and Validation Study

Author: David K. Rutishauser

Publisher:

Published: 2001

Total Pages: 28

ISBN-13:

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An analysis has been performed on data generated from the two most recent field deployments of the Aircraft Wake Vortex Spacing System (AVOSS). The AVOSS provides reduced aircraft spacing criteria for wake vortex avoidance as compared to the FAA spacing applied under Instrument Flight Rules (IFR). Several field deployments culminating in a system demonstration at Dallas Fort Worth (DFW) International Airport in the summer of 2000 were successful in showing a sound operational concept and the system's potential to provide a significant benefit to airport operations. For DFW, a predicted average throughput increase of 6% was observed. This increase implies 6 or 7 more aircraft on the ground in a one-hour period for DFE operations. Several studies of performacne correlations to system configuration options, and system inputs are also reported. The studies focus on the validation performance of the system.

Scientific and Technical Aerospace Reports
Scientific and Technical Aerospace Reports

Author:

Publisher:

Published: 1995

Total Pages: 456

ISBN-13:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Development of an Aircraft Approach and Departure Atmospheric Profile Generation Algorithm
Development of an Aircraft Approach and Departure Atmospheric Profile Generation Algorithm

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-05-30

Total Pages: 68

ISBN-13: 9781720478348

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In support of NASA Virtual Airspace Modeling and Simulation (VAMS) project, an effort was initiated to develop and test techniques for extracting meteorological data from landing and departing aircraft, and for building altitude based profiles for key meteorological parameters from these data. The generated atmospheric profiles will be used as inputs to NASA s Aircraft Vortex Spacing System (AVOLSS) Prediction Algorithm (APA) for benefits and trade analysis. A Wake Vortex Advisory System (WakeVAS) is being developed to apply weather and wake prediction and sensing technologies with procedures to reduce current wake separation criteria when safe and appropriate to increase airport operational efficiency. The purpose of this report is to document the initial theory and design of the Aircraft Approach Departure Atmospheric Profile Generation Algorithm.Buck, Bill K. and Velotas, Steven G. and Rutishauser, David K. (Technical Monitor)Langley Research CenterAIRCRAFT DESIGN; VORTICES; WAKES; AIRSPACE; METEOROLOGICAL PARAMETERS; VERTICAL DISTRIBUTION; WEATHER FORECASTING

Aircraft Wake Vortex Spacing System (Avoss) Performance Update and Validation Study
Aircraft Wake Vortex Spacing System (Avoss) Performance Update and Validation Study

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-10-02

Total Pages: 40

ISBN-13: 9781726670449

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An analysis has been performed on data generated from the two most recent field deployments of the Aircraft Wake VOrtex Spacing System (AVOSS). The AVOSS provides reduced aircraft spacing criteria for wake vortex avoidance as compared to the FAA spacing applied under Instrument Flight Rules (IFR). Several field deployments culminating in a system demonstration at Dallas Fort Worth (DFW) International Airport in the summer of 2000 were successful in showing a sound operational concept and the system's potential to provide a significant benefit to airport operations. For DFW, a predicted average throughput increase of 6% was observed. This increase implies 6 or 7 more aircraft on the ground in a one-hour period for DFW operations. Several studies of performance correlations to system configuration options, design options, and system inputs are also reported. The studies focus on the validation performance of the system. Rutishauser, David K. and OConnor, Cornelius J. Langley Research Center NASA/TM-2001-211240, L-18124, NAS 1.15:211240