1. CEOS/WGISS, Cordoba, March 7-11, 2005 1 WTF-CEOP/WGCV WGCV/WGISS Collaboration March 9, 2005 Osamu Ochiai - JAXA Ben Burford - JAXA/RESTEC

2. CEOS/WGISS, Cordoba, March 7-11, 2005 2 Primary Request: AIRS data algorithm is calibrated to sea level. Accuracy of algorithm over Tibetan Plateau (4500 meters) is poor. Can WGCV help with improving accuracy of AIRS data algorithm over Tibetan plateau? (Wider issue: regional accuracy of satellite data?)

3. CEOS/WGISS, Cordoba, March 7-11, 2005 3 Accuracy of AIRS mixing ratio data The accuracy of AIRS is not good due to the conditions of the Tibetan Plateau. Mixing ratio (g/kg) 600-500hPa 2004 (daytime) year Inside Tibet: Naqu (31.5N92E) Mixing ratio (g/kg) 600-500hPa 2004 (daytime) year Outside Tibet: Hezuo (35.0N102.9E)Good agreement. Poor agreement. AIRS Sonde AIRS Sonde

4. CEOS/WGISS, Cordoba, March 7-11, 2005 4 The Takara River In the Snowy Mountains as a field scientist The 8 th Step, Mt. Fuji

5. CEOS/WGISS, Cordoba, March 7-11, 2005 5 As a scientist of remote sensing… Snow Cover Derived from Landsat in the Upper Tone River

6. CEOS/WGISS, Cordoba, March 7-11, 2005 6 Satellite Data Accuracy We understand in-situ data and we understand model output data, but we dont understand satellite data. (Scientist at CEOP Science Steering Committee Meeting) We want to find information on accuracy of satellite data and make the information available to CEOP scientists in a useful way. –Accuracy –Error propagation

7. CEOS/WGISS, Cordoba, March 7-11, 2005 7 Error Propagation Issues Global Water Cycle Theme for the IGOS Partnership 6.7 Recommendations b) New Earth Observing Satellite missions should investigate blending of satellite products that optimize the accuracy of surface hydrologic predictions. c) The error propagation issues to be quantified.