1. Discussion Tropospheric Mission SRON, 18 nov 2003 - - Update CAPACITY workshop / time schedule - - Update Post-MSG UV-VIS instrument Michiel van Weele, KNMI

2. CAPACITY Chemistry Applications workshop 20+21 Jan at ESA-ESTEC Jointly organized with GMES-GATO final meeting Definition of workshop program; Speakers / working groups: Air Quality protocols/ EU directives Kyoto and Montreal protocols Science: tropospheric applications Science: UTLS+stratospheric applications Poster session: (mainly) capacity partners Jan – Jun 2004: setting level 2/3 data requirements

3. Post-MSG activities (2015+) Mission Requirements Document (it should be there): “Specifications for a UV-VIS Hyperspectral Imager” The document is based on: Table of consolidated user requirements (2002) established at a workshop in 2002 and based on study by Lelieveld (paper copy) Two UV-VIS studies: by Bremen (Bovensmann) and CSIRO (O Brien), respectively

4. Post-MSG activities Choices that have been made by Eumetsat already: - Five tropospheric gases remain to drive the UV-VIS- NIR chemistry instrument: CO, O3, NO2, SO2, CH2O - CO2, CH4 out: “6h temporal resolution does not require geo instrument” - Aerosols out: ‘is covered by other instrument study’ - H2O out: idem - Other gases: PAN requirements can not be met

5. Post-MSG activities Option for a combination of the UV-VIS-SWIR bands with Oxygen A band (from a separate study): Four bands: 755, 761, 764 and 775 nm FWHM: 5,3,6,5 nm Unclear if these reqs. are set for: cloud/aerosol detection, cloud-top/surface pressure determination or light path Hor. Resolution: 3km (to fulfill the 10 km requirement) -----