AQ 2007 10 31 Discussion

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Usage considerations

Legal

• EPA always has to defend its judgments in court
• Court needs "preponderance of evidence" or "beyond a reasonable doubt"

--This is quite different from 0.95% certainty.

Data lineage tracking

• How do we track sources of variance within and across datasets throughout the processing chain?
  • Take as an example the case x and y variance are not the same.
• Can we list sources of variance that must be taken into consideration as we visualize or composite datasets?
  • Cloud cover
  • Registration issues
  • Instrument issues
    • resolution
    • interference (NOx)