GIST 19 GGSPS Planning GGSPS Development Review

GIST 19: GGSPS Planning GGSPS Development & Review Planning Andy Smith GGSPS software project manager

Overview of issues With current funding, no effort is available for development work in the following areas: • Data Re-Ordering • Level 2 monthly averaging • Data Re-Processing • plus a number of known non-conformances New work has arisen due to unanticipated problems: • geolocation • stray light The above plus • ramp-down of most development effort • continuation of product processing development and validation leads to uncertainty over Acceptance and System Test plans GIST 19: GGSPS planning

How did we get here? Tight funding from the outset Launch delay/IMPF delay: • loss of team members and background knowledge • extra work to deal with SEVIRI header generation Operations: • development team effort used to support commissioning and calibration • urgent need to fix “real data” software problems • unanticipated problems, e. g. geolocation, stray light • little or no time to plan for continued development Operational experience required to determine the scope of subsystems such as Data Re-Ordering GIST 19: GGSPS planning

Data Re-Ordering: • detect missing/corrupt data and order from UMARF (L 0) • documented design exists for an automated system • experience shows that rate of loss of L 0 data is low (~2. 5%) • most L 0 data loss is through isolated events • a minimal, manual ordering system would be sufficient? (would give us >99% L 0 coverage for May-Aug sample period) GIST 19: GGSPS planning

Data Re-Processing: • ability to perform bulk reprocessing of the entire data set with improved algorithms or calibration • generation of a consistent archive of science products • development work was delayed from the outset - low priority prelaunch • no formal design exists at present • builds strongly on the finalised NRT processing software GIST 19: GGSPS planning

L 2 monthly averaging Level 2 monthly averaging • averaging of L 2 flux products into monthly and “monthly 15 minute binned” products • documented design exists • requires a change of RMIB L 2 products archived by GGSPS? GIST 19: GGSPS planning

Reviews: background The planned “end point” of GGSPS software development is the Acceptance Test and Review • AT is validation of the software against User Requirements GGSPS was reviewed in July 2002: - based on Release 2 System Test Following further development, Release 3 System Test took place in November 2003 Release 3 was the operational system for “first light” data “OR 3” development has seen further changes to the Operational Release 3 system. GIST 19: GGSPS planning

Current position Most software development activity stops in Oct 2003 - unless further funding is found Product validation and Product Processing software development continues into 2004 Do we need a further review? If so, when? • Review now, but exclude product validation? • Wait until validation complete? (Most GGSPS staff unavailable) • Several large areas of development require waivers - Data Re-Ordering, - L 2 averaging, - Data Re-Processing, - plus known software problems that will not be tackled GIST 19: GGSPS planning

Summary Additional funding is needed to develop • Data Re-Ordering • L 2 Monthly Means • Data Re-Processing • Geolocation fix • Stray light fix (? ) • and to address some known software problems (NCRs) If we don’t get extra funding, we need to consider how to handle Acceptance GIST 19: GGSPS planning