Technical Issues and Challenges

    Example: Positional correlation of objects in a region of the sky across multiple wavelengths (Radio, IR, Optical, UV, X-rays, Gamma Rays)

  • Data volume and network bandwidth

    • Cache of pre-computed results (e.g., astronomical catalogs)
    • Data filtering at data site, ship results only
    • Deployment of user code (platform independent S/W)
    • Data visualization for exploration and selection
  • Registration, Sensitivity, Positional Accuracy

    • Coordinate transformation on a large scale
    • Calibration and normalization
  • Query Optimization across Multiple Sites

    • Query execution plan for efficient cross-correlation
    • Indexing for fast access

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