Extract from Hot summary of the Fourth GSICS Users Workshop Fred Wu, Sebastien Wagner, Jerome Lafeuille Sopot, Poland, 4 September 2012

Users Request (1) Need for correction for solar bands The question of whether to supply calibration correction, or recalibrated archives will be addressed on a case-by-case basis. Access to intermediate data: will be considered as potential future product, to be analyzed with beta users. Need to validate the uncertainty estimation methodology with climate community. Need for common reference channel: we will consider recommending methodology for user to use such common reference channels.

Requests (2) Need to move the products to “operational” stage AVHRR IR channel cross-calibration Increased interaction with user community (incl. climate) Continue on-going development of products and services –Instruments : IASI-B, CrIS,.. –Instrument event log (coordinated specifications) –Online tools

Discussion on the future Vision (1) Scope: shall GSICS address other measurements (e.g. active, GPS RO)? Support access to pre-launch calibration data –Should precise the type of information needed Shall GSICS provide a variety of calibration information in addition to one official « GSICS » calibration ? –Hosting 3rd party calibration information if compliant with certain « maturity » requirements (e.g. proper documented)

Increased effort on uncertainty evaluation and documentation Further promote concept of on-orbit absolute reference payload (CLARREO, TRUTHS,…) Implement the calibration correction in the L1.5 data header when possible –Ensure future data formats allow inclusion of alternative calibration coefficients Discussion on the future Vision (2)