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ICESat 2 Science Data System Needs

ICESat 2 Science Data System Needs. Science Data Systems in the Decadal Survey. Era Workshop, June 25-26, 2009. Your Name: Ed Chang Your Title or Position: ICESat 2 Mission Manager Your Affiliation: GSFC. ICESat-2 Mission. Science Objectives

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ICESat 2 Science Data System Needs

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  1. ICESat 2 Science Data System Needs Science Data Systems in the Decadal Survey Era Workshop, June 25-26, 2009 Your Name: Ed Chang Your Title or Position: ICESat 2 Mission Manager Your Affiliation: GSFC

  2. ICESat-2 Mission • Science Objectives • Determine polar ice sheet mass balance; understand controlling mechanisms; examine how ice sheets will impact global sea level and ocean circulation in a changing climate. • Measure sea-ice thickness to understand ice/ocean/atmosphere exchanges of energy, mass and moisture. • ATLAS (instrument) Operations Concept • ATLAS, Similar to ICESat GLAS • Repeat ICESat ground-track • Orbit: 600 km, circ, 94 inclination, 91-day repeat • Pointing accuracy ± 10 arcseconds (± 30 m on ground) • Mission Status • Currently in Pre-Phase A • Planned for Launch in FY15

  3. Key Science Data System Concepts Similar to ICESat 1 ICESat Science Investigation-led Processing System (SIPS) implements the science team ATBDs into Science Algorithm Software, Produces Standard data products, distributes products to science team and public archive (Estimate 60% re-use) Level Zero Processor provides level 0 data to SIPS Precise Orbit and Pointing (POD/PAD) is provided by science team (Requirements same as ICESat-1) GES DAAC provides required ancillary atmospheric data (Existing standard data product) Science Computing Facility ( Project Science Office) provides standard data product production and distribution to Science Team National Snow and Ice Data Center (NSIDC) provides final data archive and data distribution to public (Existing Multi-Mission high re-use)

  4. Ground System Data Flow

  5. ICESat-2 Science Data Systems Key Requirements Receive Level 0 science data from the Level Zero Processor Process Level 0 data into standard science data products Distribute standard science data products to science team Distribute products for public release to NSIDC Reprocess for algorithm improvements and tuned PAD Reprocess to final dataset within one year of EOM Implement, maintain and update Science Algorithms Software based on ATBDs

  6. Science Investigator-led Process System (SIPS) Key Drivers Operate 24 x 7 with 10 x 5 staff except scheduled maintenance Process products for one day at 6X real time Ingest Level 0 Data Volume: ~7 Gbytes per day Data Products: 4-L1A, 3-L1B, 6-L2, 4- L3 Output Data Volume : ~ 52 GBytes per day (includes level 0, first release, reprocessed release)

  7. SIPS Functional Diagram(Re-use of ICESat-1 estimates noted

  8. Standard Data Products • ICESat-1 like products • Level 1 – ATLAS data converted to engineering units and calibrated of instrument prelaunch effects. • Level 1B – ATLAS global products processed for Science calibrations and parameters. • Level 2 – ATLAS regional specific products with Geophysical parameters. (Two 532 nm based atmosphere products will be deleted ) • New Level 3 global products for Sea Ice, Atmosphere and Vegetation

  9. ICESat-2 – Science Data ProcessingTypical Day in the Life During Year 2

  10. ICESat-2 Science Data System Summary Current design of ICESat-2 Mission requires similar ground system to ICESat-1 Current data systems are capable of handling processing loads, storage and data transfer to support the Mission. Upgrades to new technologies planned. Science processing software modified to process changes to the laser altimeter.

  11. ICESat 2 Science Data System Needs NASA GN for space/ground communication NASA datacircuitsto bring data from GN to GSFC and Mission Operations Center and NSIDC NSIDC for ATLAS data product archive and distribution

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