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Data Management Considerations for IGOS

Data Management Considerations for IGOS. Mark Parson, NSIDC. Some Basics to Consider. Look at what’s been done before. Of note: NRC 95. Finding the Forest for the Trees Fundamentally it is a question of data preservation and access—two sides of the same coin

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Data Management Considerations for IGOS

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  1. Data Management Considerations for IGOS Mark Parson, NSIDC

  2. Some Basics to Consider • Look at what’s been done before. • Of note: NRC 95. Finding the Forest for the Trees • Fundamentally it is a question of data preservation and access—two sides of the same coin • Data management is about people—involve professionals early • People need to understand best practices—OAIS is great and should be adopted Data Management Considerations for IGOS, 2 March 2005

  3. More Basics to Consider • Know your users--and recognize they will change in unanticipated ways • Document well - especially data uncertainty • Scientists and data managers need to work together on documentation • Documentation always takes more time and effort than you think it will • Data management costs money--there is no good business model but NRC 95 estimates 10% of total project cost. Data Management Considerations for IGOS, 2 March 2005

  4. Facilitating Integration - Issues for Observing systems • Define and enforce data standards and methods, e.g: • Data and metadata formats • Spatial and temporal scales and grids • Data collection methods • Data transfer methods and interfaces • Data quality and accountability procedures • Put someone in charge of keeping track of all this — herding the cats • More and better data integration and information mining tools will be available but they require good data. Data Management Considerations for IGOS, 2 March 2005

  5. The equatorial bias—a problem in the cryosphere Many view the world as a flat earth: “A manner of representing the distances which gives the worst results of all”. - Claudius Ptolemy (c. 100 AD) Data Management Considerations for IGOS, 2 March 2005

  6. The equatorial bias—a problem in the cryosphere We see a round (spherical) Earth This informs grids, projections,search tools, subsetting methods, etc. If you consider the poles it is easy to handle the equator, but not the other way around. Data Management Considerations for IGOS, 2 March 2005

  7. Orbit track Eighth orbit granule Coverage area as lat/lon extremes Users area of interest An example—85% false positives Data Management Considerations for IGOS, 2 March 2005

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