Jo Schmetz1 on behalf of Tim Hewison1 EUMETSAT 22 September 2018 GSICS Principles Jo Schmetz1 on behalf of Tim Hewison1 EUMETSAT

GEO-LEO Solar Product Status 2011-10 Should we spell out the basic GSICS principles? e.g. As bullet points on GCC/WMO GSICS webpages in response to users’ requests and in considering 3rd party submissions to the GPPA. Needs consideration by Exec Panel contribution/agreement from all GSICS members Some ideas for examples follow Need further discussion & agreement

GSICS General Principles e.g. Traceability Reproducibility of results Openness Applicable to operational weather and environmental satellites of the Global Observing System (GOS) ??

GSICS Science Principles Traceability through an unbroken chain of comparisons to a common reference with specified uncertainty Consistency Applicable to all instruments in a given class Systematic Continuous ongoing inter-calibration over each instrument's operational lifetime Global applicable over the full range of observations?? Based on level 1 data as supplied by satellite operator To provide inter-calibration correction function to allow users to correct original level 1 data to generate Fundamental Climate Data Records (FCDRs) To provide bias monitoring to allow users to visualise any trends in the instruments' calibration ?

GSICS Data Principles e.g. Traceability Accessibility Inclusion of meta data giving complete description Accessibility Following community standards Data access (servers) Data formats Variable naming

22 September 2018 Thank You Any Questions?