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1 Introduction
Pages 11-20

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From page 11...
... Building on the progress from three decades of measuring or inferring precipitation from space -- most recently the advances made by the Tropical Rainfall Measuring Mission (TRMM) -- the upcoming Global Precipitation Measurement (GPM)
From page 12...
... REPORT FOCUS The National Academies' Committee on the Future of Rainfall Measuring Missions was tasked by NOAA to address three questions: 1. What lessons were learned from TRMM with respect to operational uses of the data, and how can these lessons enhance the use of GPM mission data and other NASA research mission data in NOAA operational forecasts?
From page 13...
... The report's appendixes include background information about NOAA-NASA collaboration on GPM, NOAA's goals with relevance to GPM, and legislation requiring NOAA-NASA participation in a Joint Working Group on research to operations. THE GLOBAL PRECIPITATION MEASUREMENT MISSION The GPM mission is the successor to TRMM.
From page 14...
... : the core satellite, the constellation satellites that are calibrated by the core satellite, the precipitation processing system, and the international ground validation research program. NASA will contribute the GPM core satellite (in collaboration with JAXA)
From page 15...
... 10.65, 18.7, 23.8, 36.5, 89, 166, 183.3 GHz Precipitation Processing System Ground Validation Sites • Global precipitation products from • Ground measurement and calibration input data provided by a consortium of • Cooperative international partners cooperative international partners FIGURE 1.1 GPM Reference Concept. SOURCE: Adapted from Hou, 2005.
From page 16...
... TMI AMSR-E AMSR ? WINDSAT DMSP SSMIS FY-3 MWRI Megha Tropiques MADRAS GCOM AMSR GPM GMI NPOESS Micro/Image YEAR 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 Primary mission Projected extended mission Launches Future primary mission FIGURE 1.2 Duration of primary missions of spaceborne passive microwave imagers and their potential extensions (see Appendix E for explanations of program acronyms)
From page 17...
... The GPM Precipitation Processing System The GPM Precipitation Processing System will serve as the rapid science data-processing facility for precipitation missions within NASA and partner institutions. It will be capable of producing global precipitation data products from the diverse sensors and sources that are provided by NASA and cooperative international partners.
From page 18...
... NOAA may operate the GPM core satellite during this third phase Potential NOAA takeover Post-launch Pre-launch FIGURE 1.3 The three phases of GPM and how they relate to the broader context of NOAA and NASA activities and to the constellation of satellites that already contribute to global precipitation estimates. Time advances from left to right.
From page 19...
... Nearly 40 international organizations also support the plans. GEOSS has identified nine societal benefit categories in which an integrated and coordinated system of Earth-observing networks would provide help.
From page 20...
... GPM activities at NOAA and NASA will occur over the three phases of the mission: the pre-launch phase, the post-launch phase, and the potential NOAAtakeover phase. The GPM mission is a prototype for the international GEOSS initiative, which will require an integrated, intercalibration system for spacebased instruments.


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