1. /2829 November 2007 WDF-Presentation V1.6.1 1 Common Wind Tunnel Data Format

2. /2829 November 2007 WDF-Presentation V1.6.1 2  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Presentation Overview

3. /2829 November 2007 WDF-Presentation V1.6.1 3  Replace present formats to abolish limitations and add new features  Make one standard software interface for data transfer to clients  Make data file platform independent  Provide customer with a coherent set of all wind tunnel test results  Provide customer with standard structure of output medium Main Objectives of the Project

4. /2829 November 2007 WDF-Presentation V1.6.1 4  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

5. /2829 November 2007 WDF-Presentation V1.6.1 5 Wind Tunnel Test Results

6. /2829 November 2007 WDF-Presentation V1.6.1 6 Wind Tunnel Test Results (cont’d)

7. /2829 November 2007 WDF-Presentation V1.6.1 7  Software interface developed at US universities in the framework of a National Science Foundation sponsored program to exchange atmospheric research data (1988)  Enables storage/retrieval of scientific data  Supports system independent data format (from PC to supercomputer)  Permit datasets to be transported between dissimilar computers transparently Network Common Data Form (netCDF)

8. /2829 November 2007 WDF-Presentation V1.6.1 8 Advantages  Basic software available free-of-charge (sources/binaries library)  Many applications from users’ community freely available  Multiple software language support (FORTRAN, C, JAVA, Perl, …) Use of netCDF

9. /2829 November 2007 WDF-Presentation V1.6.1 9 Disadvantages  Limited software support (Unidata, users group)  Operating system OVMS (Alpha’s) has a limited number of users and therefore limited support Use of netCDF (cont’d)

10. /2829 November 2007 WDF-Presentation V1.6.1 10  Compact binary format  Direct data access  Self-describing data  All kinds of variables (char, byte, short, int, float, double)  Accessible by standard products (e.g. MATLAB, AVS Express and Gsharp, PV-WAVE)  File will contain at least one polar and at most one test Characteristics of Common Wind Tunnel Data Format

11. /2829 November 2007 WDF-Presentation V1.6.1 11 WDF File Layout

12. /2829 November 2007 WDF-Presentation V1.6.1 12 Example of Contents of WDF File (converted/edited to ASCII) netcdf t0906s0713o005 { dimensions: recorddim = 8 ; ONE = 1 ; NrOfRec = 17 ; variables: float Machno-DATA-(NrOfRec) ; Machno-DATA-:long_name = "Machno " ; // global attributes: :Version = 105 ; :CreationDate = "Thu Jul 11 13:43:40 METDST 2002 " ; :Provider = "DNW" ; :Windtunnel = "ECF" ; data: Machno-DATA- = 0.179828, 0.180565, 0.180687, 0.180897, 0.180552, 0.18062, 0.180557, 0.180404, 0.180899, 0.180435, 0.181107, 0.180846, 0.179419, 0.181349, 0.180282, 0.181191, 0.181064 ; }

13. /2829 November 2007 WDF-Presentation V1.6.1 13  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

14. /2829 November 2007 WDF-Presentation V1.6.1 14 Organisation of the Medium Hierarchical directory organisation Contains all relevant data and access software Flexible organisation in three levels

15. /2829 November 2007 WDF-Presentation V1.6.1 15 Hierarchical File Structure

16. /2829 November 2007 WDF-Presentation V1.6.1 16  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

17. /2829 November 2007 WDF-Presentation V1.6.1 17  Reads/displays WDF files  Allows filtering on SERIES, RUN, POLAR, DPN, Record, Variable  Saving and loading filters  Allow renaming of records and variables  Creation of a number of output formats (CSV, GMT, DNW, MATLAB, TECPLOT, WDF, xml for TARDIS)  Written in JAVA (platform independent)  Includes a test bench to verify correct working of WDF Viewer

18. /2829 November 2007 WDF-Presentation V1.6.1 18  Reads/plots WDF files  Selection criteria via GUI  Output to common image formats (CGM,PS, …)  Saving and loading layouts  Read multiple WDF files  Select x and y data  Multiple curves within same axes  Autoscaling or user defined  Based on Gsharp (AVS) graphical package  Comes with install scripts for various platforms Plotter

19. /2829 November 2007 WDF-Presentation V1.6.1 19  Permits medium access “horizontally”  Ability to produce a INDEX.HTML file  Permit client to access medium as a web site Medium Index Creator

20. /2829 November 2007 WDF-Presentation V1.6.1 20  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

21. /2829 November 2007 WDF-Presentation V1.6.1 21 Project Planning 2002-2008

22. /2829 November 2007 WDF-Presentation V1.6.1 22  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

23. /2829 November 2007 WDF-Presentation V1.6.1 23  Standard data format independent of wind tunnel  Standard structure of output medium  Removal limitations of present data formats, e.g. variable names, strings  Standard set of tools for data presentation is supplied (viewer, plotter, medium index creator, …)  Already defined standard formats remain unchanged (JPEG, TIFF, CSV, PDF, …)  Web page (public, free access) with latest versions of applications is maintained Main Benefits for Customers

24. /2829 November 2007 WDF-Presentation V1.6.1 24  Project Objectives  WDF Format  Medium  Tools  Project Planning  Benefits for Customers  Closing Remarks Overview Reminder

25. /2829 November 2007 WDF-Presentation V1.6.1 25 Customer Actions  To view WDF files  install JRE for WDview  To plot WDF files  install Wdplot or ncBrowse  To convert WDF files  implement reader based on template WDread program Closing Remarks

26. /2829 November 2007 WDF-Presentation V1.6.1 26 Closing Remarks (cont’d)  What is available today - Converters to WDF (from GFO, RESULTS, TOUT files) - Viewers, WDF Website (see http://www.ata.aero )http://www.ata.aero - WDF Converters (to CSV, Matlab, Tecplot, GMT, TOUT, WDF) - WDF F90 and C library, JAVA classes - Medium Index Creator - Quality control tools - WDF converter to XML - Browser documentation - Demonstration to EWA partner  What is planed in the future - WdView (selection criteria mechanism on contents instead of variable names)

27. /2829 November 2007 WDF-Presentation V1.6.1 27 Miscellaneous  http://www.ata.aeropublic website http://www.ata.aero  Wdf-users-l@ata.aeroto get infos (updates) Wdf-users-l@ata.aero To subscribe/unsubscribe to the mailing list: Mail to Info-wdf@ata.aero with the request in the textInfo-wdf@ata.aero  Info-wdf@ata.aeroto ask a question about WDF Info-wdf@ata.aero

28. /2829 November 2007 WDF-Presentation V1.6.1 28  DNWD. Krack detlef.krack@dnw.aero  ONERAB. Lallementbernard.lallement@onera.fr Points of Contact