1. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Satellite Event Working Group GSICS Workshop, 4 September 2012, Sopot, Poland Rob Roebeling, Harald Rothfuss, and Sebastien Wagner EUMETSAT

2. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Outline Background Common event logging system –Drafting a generic event logging system –Using common standards –Populating the database –Assessing the database Conclusions

3. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Background

4. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Background – Actions from CGMS and GSICS Recommendation CGMS (39.12): CGMS Satellite Operators to provide regular information on satellite/ instruments events affecting calibration and establish corresponding websites. (minutes CGMS-39). Recommendation GSCIS: Satellite operators to provide "a log of satellite / instrument events" to support the identification of "spurious" events/trends in calibrated data sets.

5. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Background – Calibrations Events Working Group EUMETSAT set up the Calibrations Events Working Group (CE-WG) that addresses the actions laid out by CGMS and GSICS. The Terms of Reference outline the following objectives: –to define Which calibration events should be logged? What information needs to be presented? and How this information should be presented and be made available to external users?; –to propose guidelines for developing a uniform calibration events logging approach for EUMETSAT, which is attuned to approaches adopted by other satellite operators; –to follow recommendations on calibration event logging from external authorities, in particular of CGMS, GSICS and WMO; –to function as a single expert group for all EUMETSAT instrument calibration event logging issues; –to communicate progress, methods and results to GSICS and CGMS.

6. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Activities - Supported by the CE-WG to make an assessment of calibration events logging systems at EUMETSAT; to collect user requirements for a common calibration event logging system; to design a common calibration event logging system; to prepare a events log data base and populate it with historic events from EUMETSAT’s geostationary and polar orbiting satellites; to make the database public through a web interface.

7. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Common Event Logging System

8. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Schematic Representation

9. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Main Categories Mission Information General information on the platform and instruments operated in the mission that is relevant to all users of the satellite data Irregular Events Events at satellite level that are not occurring systematically and that impact the radiometric or geometric quality of the observations due to instruments calibrations, manoeuvres or miscellaneous. Processing Events Updates of the processing algorithms (onboard or ground seg.) or reprocessing events (ground seg.) that modify the radiometric or geometric quality of the observations. Data Outage Events that triggered the temporary or definitive end of the data collection.

10. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Events Database Events Operational status changes (e.g. Switch to operational..) Command chain anomalies (e.g...) Operating mode changes ( e.g. Switch to rapid scan or full disk mode, Clock errors,...) Platform alteration ( e.g...) Platform damages ( e.g...) Instrument maintenance (e.g. Stray light correction, Ice decontamination,...) Instrument alteration ( e.g. Detector temperature changes, Solar diffuser changes,..) Instrument damage (e.g. CCDs failure, Mechanical anomalies, Switch to redundant systems,..) Detector configuration ( e.g. Dark current, Space view position,...) Events databases already exist at the different space-agencies. The Events-logging working group will propose a list of names for calibration events that follow standard naming conventions, and accommodate the adoption of these names in existing events databases.

11. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Adopting to Common Standards Decide on standards and means to improve traceability and uniformity cross space agencies; Use common data formats (e.g. NCDF,..). Use common naming conventions. Provide tie measurements to SI standards. Adopt to inter-national standards (ISO, OGC, …). Attune to standards used in other CGMS/GSICS programs.

12. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Populating Database Most space agencies keep a database satellite events. However, these databases 1) do not keep all required information, 2) do often not contain events from more ancient missions. Satellite events databases do not contain all the information required by users. Thus, missing information needs to be collected to complete the database. Population of the data base is a very requirement from the climate community. However, has no priority for the CGMS and GSICS actions! Consult knowledgeable users (e.g. ISCCP) to found out about events that were found in the past. Assess to what extend the different space agencies can make available information on historic events (in some cases events are kept confidential, or information is not available at the space agencies at all (especially older information).

13. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Opening up the Databases Suggestions for reporting interface (e.g. web based data base); Organise information through data base (and web interface). Database using common file standards Website should be high-level enabling intuitive event log searching. Store everything, but only make a limited amount of information available through the web.

14. EUM/OPS/VWG/11/3248 Issue 1 04/09/2011 Eumetsat Conference, 3-7 September 2012, Sopot, Poland Thank You Any Questions?