GEO IR Beta testers feedback

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GEO IR Beta testers feedback • • • Users identified so far Active beta-testers Feedback received Lessons learnt Requests for new products 1

Users identified so far • • • CM-SAF UK Met Office ECMWF LSA-SAF ISCCP 2

From Users’ Workshop: Several users willing to evaluate impact of GSICS on various products: • Peter Francis (Met Office) is willing to apply the GSICS Correction to Meteosat-9 IR channels and to compare the resulting O-B biases with those from the uncorrected observations • Elisabeth Good (Met Office) reported that the EUMETSAT SAF on Land Surface Analysis (LSA SAF) would be interested in evaluating the impact of GSICS Correction for Meteosat-9 IR data on the diurnal cycle of Land Surface Temperatures. • Atsushi Higuchi (Chiba Univ. ) reported positive impacts of GMS visible channel vicarious calibration on aerosols and other products. • Jörg Schulz (CM SAF, DWD) offered to compare operational radiance, GSICS Corrected radiance, and in-house corrected radiance using reference RAOB. He is also interested in evaluating the impact of GSICS corrected Meteosat-9 radiance on the Upper Tropospheric Humidity products of the EUMETSAT SAF on Climate Monitoring (CM SAF).

Active beta-testers • Pete Francis (UK Met Office) – testing EUMETSAT’s GSICS Correction for SEVIRI IR channels (wrt IASI) – Impact on Bias monitoring & CTH products • EUMETSAT – testing EUMETSAT’s GSICS Correction for SEVIRI IR channels (wrt IASI) – Impact on CTH and GII products 4

Feedback Received • “It's not clear to me how I'm going to be able to apply any corrections to the calibration of the L 1. 5 data we receive” – Need to make “Readme” guide more obvious with products • “Can we just have new calibration coefficients? ” – For SEVIRI, yes • “Can you produce corrections for December 2008? ” – Yes! • “Do we have to use the net. CDF format? ” – Err. . . • “Are you sure these values are correct? ” – Err. . . 5

Lessons Learnt • We need to make “Readme” guide obvious with products • We must notify registered users when we issue changes – We need a mechanism to do this • We should test products written in the supplied format ! • We should evaluate corrections over range of radiances! • We should provide access to searchable satellite/ instrument logs recording significant operational changes 6

Requests for new products • CM-SAF interested in testing GSICS Correction for WV channel of Meteosat-7 MVIRI • Impact on Free Tropospheric Humidity product • Particularly archive data – Need to use heritage reference instrument - e. g. HIRS 7

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