NOAA's Role in Space-Based Global Precipitation Estimation and Application (2007) / Chapter Skim
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In conjunction with comprehensive, accurate ground validation and calibration, satellite observations offer the only realistic prospect for accurate and semicontinuous global precipitation data sets, especially over the oceans and in remote regions. Building on the progress from three decades of measuring or inferring precipitation from space -- most recently with advances made by the Tropical Rainfall Measuring Mission (TRMM)
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Department of Defense, Joint Center for Satellite Data Assimilation (JCSDA) , Japanese Meteorological Agency, European Space Agency, Indian Space Research Organization, French Space Agency, China Meteorological Administration, International Precipitation Working Group (IPWG)
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carrying both a microwave radiometer and a precipitation radar. This provides NOAA and NASA with a superb opportunity to plan and carry out effective transitions early in their GPM collaboration and to test and refine methodologies in advance of the GPM core satellite launch.
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In addition, NOAA is participating in multiple, joint NASA-NOAA planning activities, namely, the NOAA-NASA GPM Research and Operations Group, NOAA participation on the NASA Precipitation Measurement Missions science team, the Joint Center for Satellite Data Assimilation (JCSDA) , and the International Precipitation Working Group (IPWG)
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BEST USES OF GPM DATA AT NOAA To identify the best uses of GPM mission data at NOAA, the committee examines NOAA mission requirements for precipitation data and related products. Next, the committee identifies current sources and applications of NOAA operational precipitation data and recommends improvements in preparation for GPM.
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Recommendation: NOAA's strategic planning for GPM should ad dress the need for the development and implementation of opera tional versions of the four basic components of the GPM research program. Although the future state of operational global precipitation measurements is unclear, NOAA has the opportunity to lead and catalyze development of an operational precipitation measurement network in addition to supporting and working on the next-generation observational efforts that are planned for the GPM mission.
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(4.6) • Enhance research and development on data assimilation and moist physics parameterizations in models using proxy data from TRMM to test performance.
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(3.4) • Take a leadership role in the international satellite community by proposing specific actions for the accurate calibration of all microwave imagers and sounders through cross-calibration and standard reference data sets and for implementing internal calibrations on all future microwave sensors.
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(Chapter 4) • Evaluate the potential for assimilation and model improvements to handle GPM data and implement those that have potential to improve the value of the data, including computer processing power needs and data storage capacity for the operational phase.
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(Chapter 5) • Use error characterization for retrieval algorithms and data assimilation applications from the GPM ground validation program.
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