GSICS Web Meeting Tim Hewison 2010-04-22 Error Analysis and Assessment Criteria for solar channel inter-calibration methods GSICS Web Meeting Tim Hewison 2010-04-22

Draft agenda Any Other Business? 10min T. Hewison Aim of Meeting & AOB P. Henry Error Analysis for Rayleigh Scattering X. Wu Assessment Criteria for inter-calibration methods 5min D. Doelling Application of above to Deep Convective Clouds S-H. Ham Application of above to Liquid Water Clouds Application of above to Deserts/Bright Land Surfaces A. Okuyama Application of above to JMA Vicarious Calibration A. Heidinger Application of above to Sun Glint Application of above to Moon and Stars Application of above to GEO-LEO IR hyperspectral Application of above to Direct Ray-matching Comparisons R. Kessel Potential for combining inter-calibration methods Any Other Business?

Aim To agree common methodology to quantify the uncertainties on each method For application to the solar channels of GEO-LEO inter-calibration Following CEOS guidelines To agree common qualitative criteria for assessing their performance To identify complementary methods

Brief Please consider: How to apply to "your" Solar inter-cal method: Patrice's method of Error Analysis Fred’s Assessment Criteria Please concentrate on these rather than the inter-calibration method, which will be the subject for later discussions. What information is needed to perform this analysis? When can we expect results? How the error budget can be performed for multiple observations, which may not be independent? Should systematic biases and random errors be treated separately?

Conclusions Do the uncertainty analysis and assessment criteria need further revisions? What is needed to complete analysis? How we will review analyses? E.g. gsics-dev@googlegroups.com? GSICS wiki? Email to other investigators in GSICS or external? What is the timescale? Next web meeting? Next GRWG meeting?