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GERB Ground Segment

GERB Ground Segment. B.C.Stewart RAL. Topics. Processing System EUMETSAT interface RMIB interface User access Operations Meetings/ management. Processing System Status. Processing software (now at V12): Handling of new instrument modes Improvements in robustness Geolocation tuning

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GERB Ground Segment

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  1. GERB Ground Segment B.C.Stewart RAL Ground Segment (GGSPS) Report

  2. Topics • Processing System • EUMETSAT interface • RMIB interface • User access • Operations • Meetings/ management Ground Segment (GGSPS) Report

  3. Processing System Status • Processing software (now at V12): • Handling of new instrument modes • Improvements in robustness • Geolocation tuning • Ongoing population of engineering products • Gains and offsets added to L15N products • Preparation for inclusion of Integrating Sphere data • Preparation for re-processing • Updated SEVIRI header selection algorithm • Problems (INGRES, Data Reception) • Future Work Ground Segment (GGSPS) Report

  4. INGRES • Problem with INGRES database, started 26th Feb, • caused GGSPS components to “hang” • frequency increased up to ~once per day • on some occasions led to loss of raw data • Changes made: • database re-configured: didn’t fix it (frequency reduced?) • additional diagnostic logging in GGSPS software • updated GGSPS messaging to prevent loss of raw data due to system hang • Problem not seen since (> 2 weeks smooth running) • We still do not understand this problem… Ground Segment (GGSPS) Report

  5. Other problems • Data Reception: “real data” problems • detection of corrupted data: packet checksum • handling of instrument ‘transitional’ mode changes • Upgrades to DR planned for the near future to address both of these problems • Minor problems generating “pseudo SEVIRI header” files Ground Segment (GGSPS) Report

  6. Future work • Robustness: improve error handling, make the system more “driveable” to facilitate hand-over to an operator • Product Processing: product validation, tuning geolocation, complete population of Eng products • Level 2 monthly averaging: coding not started • Re-Ordering to fill in data gaps (breaks in transmission from Eum, GGSPS outages) • User interface: web pages, product documentation Ground Segment (GGSPS) Report

  7. EUMETSAT – RAL interface • Formal tests with EUMETSAT – line basically works. • Missing packets – still few 10’s / day cause still not known, comparison planned with UMARF, GGSPS and EUMETSAT interest. Longer gaps understood (EUMETSAT/ GGSPSsystem problems, GERB telemetry switched off) • Leased line appears to have behaved faultlessly once initial problems sorted out • EGSE currently being used to provide an ‘online’ pipeline for remaining functional/ calibration tests Ground Segment (GGSPS) Report

  8. RMIB interface • Formal tests not complete but product interchange works. • 15 min files transferred in typically <10 seconds Ground Segment (GGSPS) Report

  9. User access URL : http://ggsps.rl.ac.uk/ • Website operational and being used by ICSTM, Reading … • Initial access not password protected, product and catalogue access password protected • Catalogue searches based on date and product type • individual file download from search results • multiple (<=600) file download from search results • Bulk download of latest day’s data (in 6hr blocks) • Basic read/plot software available • Engineering/ performance plotting system in place and accessible – daily plots of parameters, long term trends. Evolving in consultation with ICSTM and instrument builders. • Background information: product user guides in progress • “Discussion forum” link to be added Ground Segment (GGSPS) Report

  10. Operations - evolution • EUMETSAT-ICSTM/RAL Interface Control Document • being updated (report format evolution, points of contact, GGSPS & GOT usernames) • EUMETSAT reports • Commanding, Related SEVERI functions, Line anomalies • GOT functions • Transfer RAL => ICSTM (commands files, tables) • Flight Operations Manual (FOM) • To be updated in light of experience (limits, SAFEing function) • EEPROM • Nominal tables uploaded Ground Segment (GGSPS) Report

  11. Meetings • Weekly GGSPS technical (RAL internal) • actions, system status/ planned upgrades, current problems eg INGRES, any new issues, periodically review Change Requests, NCRs • Project Scientist • 4-6 weekly GERB operations (RAL, ICSTM, RMIB, LU) • Reports/ plans, GGSPS, Project Scientist, GOT, RMIB (includes analysis and anomalies) • EUMETSAT issues • Commissioning activities • Minutes and actions • For the future CAL/ VAL or another forum? Ground Segment (GGSPS) Report

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