1. US Calibration/Validation Activities for the ADM/Aeolus Mission Mike Hardesty and Lars-Peter Riishojgaard

2. Cal/Val information from Recent ADMAG Purpose of Cal/Val exercise –Quantify accuracy of primary and auxiliary parameters –Characterize deviations –Recommendations for improvements to processing Two phases will be commissioned: First (commissioning) and Second (routine) Call will be worldwide Proposers must bring their own funding Access to data only through cal-val team Announcement of Opportunity: October 1

10.  Does ALADIN need calibration or only validation?  burst-mode operation: Can time and location of satellite observation be predicted or even commanded, e.g. by start time of laser burst operation?  opportunity for validations for 50-km scale observations  satellite-ground: once every 5-10 days in 50 km distance  satellite-aircraft: 2-3 flights in 1 geographical region with 7 s observation time on satellite compared to 4 minutes on aircraft => allows to study measurement (1-10 km) to observation scale (50 km) issues  Ground wind observations of horizontal wind vector needs to be projected onto satellite LOS direction  L1B Mie winds can be validated with wind measuring instruments; L1B Rayleigh winds (uncorrected for T) can not be validated with other wind measuring instruments, except with A2D which measures also uncorrected Rayleigh wind  L2A aerosol products (backscatter, extinction, cloud base) can be validated, but most ground based lidars point toward zenith  L2B wind products can be validated both for Mie and Rayleigh Specific ADM-Aeolus issues for airborne and ground validations (Oliver Reitebuch)

13. 1a/b. What are Level-2B/2C Products?  Retrieval algorithm accounts for T & p effects in Rayleigh channel signal Meteorologically representative wind vector profiles Meteorologically representative hlos profiles  Measurements grouped and weighted according to features detected in atmospheric scene (primarily clouds & aerosol) Meteorological products

14. 1a/b. What are Level-2B/2C Products?  2B: Meteorologically representative HLOS profiles ─ retrieval algs applied to Level-1B data, 2B-output suitable as input to data assimilation ─ auxiliary input data: T & p, Rayleigh-Brillouin response data, etc  2C: Meteorologically representative wind vector profiles ─ result of a data assimilation algorithm, combining Level-2B with other data/weather forecast model  How do they differ from Level-1B Products? ─ Rayleigh channel retrieval accounts for T & p effects ─ measurements grouped/weighted by features detected in the atmospheric scene (primarily clouds & aerosol)

15. Assembling a US cal/val effort Develop a proposal to respond to ESA AO –Put together a team Define major elements of a US cal/val effort –Direct Observations for comparison –Data evaluation through assimilation into models Explore funding opportunities (ESA will not provide funding)

16. Potential Direct Observations Long term, statistical comparisons –NWS Wind Profiler Network –Boundary layer profilers –Radiosondes –In situ sensors on commercial aircraft –Cloud track winds –Water vapor winds –Surface based lidar measurements during satellite overpasses Measurement comparison campaigns –TwiLite Airborne lidar –TODWLS –NOAA Airborne HRDL –Notional Hybrid lidar (direct and coherent)

17. How to proceed? Develop a basic outline for the cal/val effort –MH and LPR will be points of contact –Interested parties should provide input and outline potential contributions within next two months Develop funding sources –Potential for funds in the FY 2010 NOAA budget for ADM cal-val activities –Explore opportunities for NPOESS, NASA and DOD funding Riishojgaard and Hardesty will develop proposal for submission