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Product status and timeline

Product status and timeline. Andy Smith RAL. User products. The GGSPS provides user access to the following products: Level 1.5 NANRG, ARG Level 2 ARG (and BARG?) fluxes Level 2 monthly means L2 means – work will not start until mid-year (if funded)

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Product status and timeline

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  1. Product status and timeline Andy Smith RAL

  2. User products • The GGSPS provides user access to the following products: • Level 1.5 NANRG, ARG • Level 2 ARG (and BARG?) fluxes • Level 2 monthly means • L2 means – work will not start until mid-year (if funded) • L2 fluxes – depends on RMIB’s validation • L1.5 follows…

  3. Prerequisites • The GGSPS should generate NRT L1.5 products of acceptable data quality. • The data archive should give complete time coverage (as far as possible). • The data set should be consistent over time. • The interface for product download should be reliable and user-friendly. • The data products should be well documented.

  4. Product quality • Main issues affecting NRT L1.5 products data quality • Geolocation: • Initial CSOL fix ready by April? • Optical model – initial work by June? Follow-up later • Long-term CSOL fix: EUM to review July ’04? • Plus unknowns… • Stray light (deep space, Earth view, black body) • Imperial to provide info on gain stability? • Initial deep-space fix - prediction and use of fixed gains • Cal tables • Product validation – timing TBD?

  5. Completeness • The data archive should give complete time coverage (as far as possible). • Current status: • the GGSPS L0 and L1.5 archives are “gappy” • UMARF holds the complete L0 data set • Re-order L0 data from UMARF to fill in gaps • Software required to ingest re-ordered L0 data • - ready May/June? • Process re-ordered data to L1.5 • - wait for bulk re-processing

  6. Consistency • The data set should be consistent over time, i.e. • L1.5 archive should be self-consistent • - same algorithms and cal tables used throughout • L1.5 archive should be consistent with available L2 data • L1.5 archive - algorithms & cal. tables change with time • Re-process with current algorithms & tables • - Software ready August? • Re-processing to L1.5 should be quick • (~1 hour to catch up 1 day in NRT operations) • No TSOL jitter data available before 16th Feb ’04 • - can’t reprocess old data with a consistent geolocation

  7. Consistency • Consistency with Level 2: • Is it desirable to produce the “best possible” L1.5 data set? • L1.5 data may become inconsistent with available L2 data • - depends on RMIB’s ability to re-process to L2

  8. Data access • The interface for product download should be reliable and user-friendly. • Current system cannot handle simultaneous large requests (but can be improved) • Separate access to public/restricted data not yet available • Use the BADC for public data? • If so, what about bulk download of restricted data? • Plus technical issues to be resolved with BADC

  9. Documentation • The data products should be well documented. • L1.5 product user guides are available • If known problems present in data, more documentation needed • Issues affecting L2 (flux) release: • Data quality: validation • Data access and availability of documentation • Support: • Data release requires additional support effort • Slows new development

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