Vision for ERB-mission for post-EPS ?

1. Vision for ERB-mission for post-EPS ? • Post-EPS: Background MRD Priorities for different mission Earth Radiation Budget Instrument on Post-EPS

2. Post-EPS Need date and overall planning Caveat: as of April 2005 presented by EUM (!)

3. Vision for ERB-mission for post-EPS ? Post-EPS: Background Tentative missions identified • Wind Profiling • Atmospheric Sounding • Ocean Imaging (incl. Sea Ice, Winds) • Ocean Surface Topography • Cloud, Precipitation & Land Surface Imaging • Atmospheric Chemistry • Climate Monitoring (to be supported within above missions) • User Consultation: review/expansion of user requirements • and initial assessment of relevant observation techniques • by Application Expert Groups (AEG) supported by Remote Sensing Experts • Atmospheric Sounding and Wind Profiling • Ocean Topography and Imaging • Cloud, Precipitation & Land Surface Imaging • Atmospheric Chemistry Caveat: as of April 2005 presented by EUM (!)

4. PMET: Post-EPS Mission Prioritisation – Climate Instrument Priority instrument class __________________________________________________________________________ Microwave Sounding (MWS) 3 AMSU, ATMS Dual View Radiometry (DVR) 3 ATSR, AATRS Radar Altimetry (ALT) 3 RA Radiant Energy Radiometry (RER) 3 CERES, ERB,S, ERM, ScaRaB Microwave Imaging (MWI) 2 SSM/I, SSMIS, CMIS, AMSR, TMI - Ocean and Land – High-Resolution Infrared Sounding (IRS) 2 IASI, AIRS, CrIS Microwave Imaging (MWI) 2 as MWI – Cloud - Aerosol Profiling Lidar (APL) 2 ATLID, CALIOP Ocean Colour Imaging (OI) 2 MERIS, VIIRS, MODIS, OCM VIS/IR Imaging (VII) 1 VIIRS, MODIS, AVHRR, VIRR Scatterometry (SCA) 1 ASCAT, SeaWinds, AMI-SCAT Microwave Imaging (MWI) 1 as MWI -Precipitation – Cloud and Precipitation Radar (CPR) 1 PR (TRIMM), CPR Earth-CARE, C CPR CloudSat Limb Millimetre-Wave Sounding (MMW) 1 MLS (EOS-Aura) Radio Occultation Sounding (RO) 0 GRAS, ROSA, IGOS Doppler Wind Lidar (DWL) 0 ALADIN (ADM-Aeolus) Nadir viewing UV/VIS/NIR-SWIR Sounding (UVNS) 0 GOME-2, Sciamachy, SBUV, MOPITT, OMI, OMPS Multiple-viewing, Multi-channel, Multi- 0 POLDER, MISR, AMS Polarization Imaging (3MI) Limb Infra-Red Sounding (LIR) 0 MIPAS, TES, HIRDLS Different Absorption Lidar (DIA) 0 ATLID

5. Conclusion about status so far Although the climate expert group considered RER to be very import, it was set to a lower priority by all other expert groups (NWC, NWP, etc.) => there will be no climate mission with an RER instrument. Rem: (Bruce W.): there is no climate obs. System by design, only by default Nevertheless, there might be a 2nd chance… The following question has been posed by J. Eyre: „It is clear, that RER is not coming out high in prioritized missions, despite its importance for climate monitoring. This might be not a problem, if RER is a small, undemanding instrument, which can easily be accommodated as a ‚passenger‘ on a platform without driving it..[]“

6. There might be a 2nd chance… In other words: - a simple instrument which, at each location viewed, measures broad-band radiances at only one viewing angle (relying on instruments on other missions or on calculations, for the radiance to flux conversion) OR - a more complex instrument which views at several angles. => „VISION“ from the Radiation Budget community is needed!!! (Deadline: PMET-5 Meeting End of May)

7. Statement from B. Bizzarri: „As conceived so far, the ERB mission is not effective. CERES is about 100 kg & 100 W payload and its use is limited by the awful amount of anc./aux-Data needed for processing its data. Even so, data are only used for process studies or GCM performance and not for NWP assimilation. Re-design of vision for ERB mission, involving synergy/merging with 3MI would be desirable.” Comments?

8. Priorities from climate application group 3 highest prio, 1 lowest prio