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Integrating Existing Software Toolkits into VO System

Chinese Virtual Observatory. Integrating Existing Software Toolkits into VO System. Chenzhou Cui, Yongheng Zhao, Xiaoqian Wang, Jian Sang National Astronomical Observatory of China Ze Luo Computer Network Information Center, CAS. Existing Software Resources.

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Integrating Existing Software Toolkits into VO System

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  1. Chinese Virtual Observatory Integrating Existing Software Toolkits into VO System Chenzhou Cui, Yongheng Zhao, Xiaoqian Wang, Jian Sang National Astronomical Observatory of China Ze Luo Computer Network Information Center, CAS

  2. Existing Software Resources Software Packages, Toolkits, Libraries • Astronomical Utilities • Image Manipulation • Math and Statistics • Plotting Comprehensive data processing environments • IRAF • MIDAS • AIPS/AIPS++ TDC (http://tdc-ww.harvard.edu/astro.software.html) ASDS (http://asds.stsci.edu/ ) SPIE 2004, Glasgow

  3. Astronomical Utilities • Coordinate conversion • equatorial (RA, Dec) to horizon (alt, azimuth) coordinates • Date conversion • calendar date to Julian Date • Units conversion • Magnitude to flux,,, • Ephemeris calculation • Sun set/rise, eclipse SPIE 2004, Glasgow

  4. Image Manipulation • Format conversion • Jpg, gif, tiff,fits,… • Image edit • Rotate, resize, filter,… • Image correlation, image aligning,mosaics • FITS image manipulation • (C)FITSIO SPIE 2004, Glasgow

  5. Data analysis simple math operations differentiating integrating statistics Fast Fourier Transform (FFT) (de)convolution data smoothing data filtering Peak picking data sorting Curve fitting linear fitting nonlinear fitting Math and Statistics SPIE 2004, Glasgow

  6. Plotting • 1D • spectrum, time series, … • 2D • Line, Scatter, bar, column, pie, … • histogram, polar, vector,… • 3D • bar, scatter, surface, contour, … SPIE 2004, Glasgow

  7. VO Integration Issues • Application is crucial for VO • Extensively applications are key criteria to measure the success of VO • Software has been an essential part in `doing astronomy‘ • Scratching or inheriting? • New infrastructure and new tools are necessary • Reuse of existing resources is also necessary SPIE 2004, Glasgow

  8. Existing Applications • Grid-ready • VO-ready General Integrating Approaches • Java-ready • rewriting • wrapping China-VO view: VO is an advanced application of the GRID SPIE 2004, Glasgow

  9. Two Integration Tactics • Specific Tactics • to integrate existing software one by one • high quality • Problem-Solving Environments • a fully or semi automatic solution for the wrapping of legacy codes • JACAW, GAT, GAF4J, JCI , CEA • high efficiency SPIE 2004, Glasgow

  10. Two integration efforts from China-VO • A consortium initiated by National Astronomical Observatory of China • Still in early research phase • Focuses on application and implementation • Act as a bridge between IVO and its end-users • Provide some best practices for the IVO • gImageMagick, grid-enabled ImageMagick • Grid Environment for Galactic abundance gradients Statistical Research SPIE 2004, Glasgow

  11. gImageMagick ImageMagick • An open-source but robust collection of tools and libraries to read, write, and manipulate an image • Good candidate for integration • Useful function features for VO visualization • Good CLI • Multi OS support • Friendly APIs in many programming languages SPIE 2004, Glasgow

  12. gImageMagick SPIE 2004, Glasgow

  13. VO extension for gImageMagick • IVOA interfaces support • SIAP • VOResource • Well-packaged, easy of installation and easy of use • Providing G/W Service interface for standard ImageMagick installation (RPM, gz) • http://services.china-vo.org • IVOA applications mailing list: “apps@ivoa.net” SPIE 2004, Glasgow

  14. Dynamic Data (X,Y,Z,U,V,W) Orbit Parameters (Rmax, Zmax) Galactic Mass Distribution Model Stellar Abundances [M/H] Grid Environment for Galactic abundance gradients Statistical Research Abundance Gradient SPIE 2004, Glasgow

  15. Grid Environment for Galactic abundance gradients Statistical Research SPIE 2004, Glasgow

  16. VO Integration • VO services: • not defined clearly • Compliant to IVOA specifications • Standard Interfaces • The role of common application environments • What application is good candidate for VO services? the more simple I/O and simple user interface the more easier to integrate IRAF, MIDAS, AIPS, … need heavy user interaction almost impossible for integration SPIE 2004, Glasgow

  17. Thank You Q & A ? www. .org SPIE 2004, Glasgow

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