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  • 1
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    The Global Precipitation Measurement (GPM) Mission for Science and Society (2017)
    American Meteorological Society
    Details
    Publication Date: 2017-08-01
    Description: Precipitation is a key source of freshwater; therefore, observing global patterns of precipitation and its intensity is important for science, society, and understanding our planet in a changing climate. In 2014, the National Aeronautics and Space Administration (NASA) and the Japan Aerospace Exploration Agency (JAXA) launched the Global Precipitation Measurement (GPM) Core Observatory (CO) spacecraft. The GPM CO carries the most advanced precipitation sensors currently in space including a dual-frequency precipitation radar provided by JAXA for measuring the three-dimensional structures of precipitation and a well-calibrated, multifrequency passive microwave radiometer that provides wide-swath precipitation data. The GPM CO was designed to measure rain rates from 0.2 to 110.0 mm h−1 and to detect moderate to intense snow events. The GPM CO serves as a reference for unifying the data from a constellation of partner satellites to provide next-generation, merged precipitation estimates globally and with high spatial and temporal resolutions. Through improved measurements of rain and snow, precipitation data from GPM provides new information such as details on precipitation structure and intensity; observations of hurricanes and typhoons as they transition from the tropics to the midlatitudes; data to advance near-real-time hazard assessment for floods, landslides, and droughts; inputs to improve weather and climate models; and insights into agricultural productivity, famine, and public health. Since launch, GPM teams have calibrated satellite instruments, refined precipitation retrieval algorithms, expanded science investigations, and processed and disseminated precipitation data for a range of applications. The current status of GPM, its ongoing science, and its future plans are presented.
    Print ISSN: 0003-0007
    Electronic ISSN: 1520-0477
    Topics: Geography , Physics
    Published by American Meteorological Society
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  • 2
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    The TRMM Multisatellite Precipitation Analysis (TMPA): Quasi-Global, Multiyear, Combined-Sensor Precipitation Estimates at Fine Scales (2007)
    American Meteorological Society
    Details
    Publication Date: 2007-02-01
    Description: The Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA) provides a calibration-based sequential scheme for combining precipitation estimates from multiple satellites, as well as gauge analyses where feasible, at fine scales (0.25° × 0.25° and 3 hourly). TMPA is available both after and in real time, based on calibration by the TRMM Combined Instrument and TRMM Microwave Imager precipitation products, respectively. Only the after-real-time product incorporates gauge data at the present. The dataset covers the latitude band 50°N–S for the period from 1998 to the delayed present. Early validation results are as follows: the TMPA provides reasonable performance at monthly scales, although it is shown to have precipitation rate–dependent low bias due to lack of sensitivity to low precipitation rates over ocean in one of the input products [based on Advanced Microwave Sounding Unit-B (AMSU-B)]. At finer scales the TMPA is successful at approximately reproducing the surface observation–based histogram of precipitation, as well as reasonably detecting large daily events. The TMPA, however, has lower skill in correctly specifying moderate and light event amounts on short time intervals, in common with other finescale estimators. Examples are provided of a flood event and diurnal cycle determination.
    Print ISSN: 1525-755X
    Electronic ISSN: 1525-7541
    Topics: Geography , Geosciences , Physics
    Published by American Meteorological Society
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  • 3
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    GPM Satellite Simulator over Ground Validation Sites (2013)
    American Meteorological Society
    Details
    Publication Date: 2013-11-01
    Print ISSN: 0003-0007
    Electronic ISSN: 1520-0477
    Topics: Geography , Physics
    Published by American Meteorological Society
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  • 4
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    Enhancing TRMM with a Near-realtime System and Special Products (2012)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: During the development phase of the TRMM mission, the decision was made that no near-realtime (NRT) system would be available during the TRMM 5 year extended mission period. Concern about the costs that might be incurred by requiring such an additional capability In 2000 the TRMM project scientist felt that a best effort should be made to provide such an ability for TRMM. The addition of this best-effort capability has added greatly to the utility of TRMM to the community especially the applications community. This paper will describe the current TRMM NRT products, how they are derived their availability and accessing them. It will provide some examples of how these products have been used.
    Keywords: Meteorology and Climatology
    Type: GSFC-E-DAA-TN6566 , 4th International TRMM Science Conference; Nov 13, 2012 - Nov 16, 2012; Tokyo; Japan
    Format: application/pdf
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  • 5
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    GPM Data Product and Services (2011)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Meteorology and Climatology
    Type: GSFC.CPR.4949.2011 , 2011 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2011); Jul 24, 2011 - Jul 29, 2011; Vancouver; Canada
    Format: application/pdf
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  • 6
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    Global Precipitation Measurement (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: An important goal of the Global Precipitation Measurement (GPM) mission is to maximize participation by non-NASA partners both domestic and international. A consequence of this objective is the provision for NASA to provide sufficient incentives to achieve partner buy-in and commitment to the program. NASA has identified seven specific areas in which substantive incentives will be offered: (1) partners will be offered participation in governance of GPM mission science affairs including definition of data products; (2) partners will be offered use of NASA's TDRSS capability for uplink and downlink of commands and data in regards to partner provided spacecraft; (3) partners will be offered launch support for placing partner provided spacecraft in orbit conditional upon mutually agreeable co-manifest arrangements; (4) partners will be offered direct data access at the NASA-GPM server level rather than through standard data distribution channels; (5) partners will be offered the opportunity to serve as regional data archive and distribution centers for standard GPM data products; and (6) partners will be offered the option to insert their own specialized filtering and extraction software into the GPM data processing stream or to obtain specialized subsets and products over specific areas of interest (7) partners will be offered GPM developed software tools that can be run on their platforms. Each of these incentives, either individually or in combination, represents a significant advantage to partners who may wish to participate in the GPM mission.
    Keywords: Earth Resources and Remote Sensing
    Type: NASA/TM-2002-210013-Rept-2 , Rept-2002-01650-0-Rept-2 , NAS 1.15:210013-Rept-2
    Format: application/pdf
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  • 7
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    CEOS Precipitation Constellation (2007)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This viewgraph presentation discusses the implementation of the Committee on Earth Observation Satellites (CEOS) precipitation constellation. The contents include: 1) Why a constellation; 2) Who is working on it; 3) Where are we; 4) Where are we going; and 5) What is the approach.
    Keywords: Meteorology and Climatology
    Type: CRSS/ASPRS 2007 Specialty Conference; Oct 30, 2007 - Oct 31, 2007; Ottawa; Canada
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Improving Access to Precipitation Data for GIS Users: Designing for Ease of Use (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Global Precipitation Measurement Mission (GPM) is a NASA/JAXA led international mission to configure a constellation of space-based radiometers to monitor precipitation over the globe. The GPM goal of making global 3-hour precipitation products available in near real-time will make such global products more useful to a broader community of modelers and Geographic Information Systems (GIS) users than is currently the case with remote sensed precipitation products. Based on the existing interest to make Tropical Rainfall Measuring Mission (TRMM) data available to a growing community of GIS users as well as what will certainly be an expanded community during the GPM era, it is clear that data systems must make a greater effort to provide data in formats easily used by GIS. We describe precipitation GIS products being developed for TRMM data. These products will serve as prototypes for production efforts during the GPM era. We describe efforts to convert TRMM precipitation data to GeoTIFF, Shapefile, and ASCII grid. Clearly, our goal is to format GPM data so that it can be easily used within GIS applications. We desire feedback on these efforts and any additions or direction changes that should be undertaken by the data system.
    Keywords: Earth Resources and Remote Sensing
    Type: IASTED Environment Stimulation and Modeling Conference; Aug 20, 2007 - Aug 22, 2007; Honolulu, HI; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    TRMM Data Improvement as Part of the GPM Data Processing (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASA has a long standing commitment to the improvement of its mission datasets. Indeed, data reprocessing is always built into the plans, schedule and budget for the mission data processing system. However, in addition to these ongoing mission reprocessing, NASA also supports a final reprocessing of all the data for a mission upon its completion (known as Phase F). TRMM Phase F started with the end of the TRMM mission in June of 2015. This last reprocessing has two overall goals: improvement of the TRMM mission data products; incorporation of the 17+ years of TRMM data into the ongoing NASA/JAXA GPM data processing. The first goal guarantees that the latest algorithms used for precipitation retrievals will also be used in reprocessing the TRMM data. The second goal ensures that as GPM algorithms are improved, the entire TRMM data will always be reprocessed with each GPM reprocessing. In essence TRMM becomes another of the GPM constellation satellites. This paper will concentrate on presenting the improvements to TMI level 1 data including calibration, geolocation, and emissive antenna corrections. It will describe the format changes that will occur how the TMI level 1C product will be intercalibrated using GMI as the reference calibration. It will also provide an overview of changes in the precipitation radar products as well as the combined TMIPR product.
    Keywords: Meteorology and Climatology
    Type: GSFC-E-DAA-TN42161 , International Precipitation Working Group (IPWG) meeting; Oct 03, 2016 - Oct 07, 2016; Bologna; Italy|International Precipitation Working Group (IPWG) Joint Workshop; Oct 03, 2016 - Oct 07, 2016; Bologna; Italy
    Format: application/pdf
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  • 10
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    The Global Precipitation Measurement (GPM) Mission for Science and Society (2017)
    In:  CASI
    Details
    Publication Date: 2019-11-23
    Description: Precipitation is a key source of freshwater; therefore, observing global patterns of precipitation and its intensity is important for science, society, and understanding our planet in a changing climate. In 2014, the National Aeronautics and Space Administration (NASA) and the Japan Aerospace Exploration Agency (JAXA) launched the Global Precipitation Measurement (GPM) Core Observatory (CO) spacecraft. The GPM CO carries the most advanced precipitation sensors currently in space including a dual-frequency precipitation radar provided by JAXA for measuring the three-dimensional structures of precipitation and a well-calibrated, multifrequency passive microwave radiometer that provides wide-swath precipitation data. The GPM CO was designed to measure rain rates from 0.2 to 110.0 mm h1 and to detect moderate to intense snow events. The GPM CO serves as a reference for unifying the data from a constellation of partner satellites to provide next-generation, merged precipitation estimates globally and with high spatial and temporal resolutions. Through improved measurements of rain and snow, precipitation data from GPM provides new information such as details on precipitation structure and intensity; observations of hurricanes and typhoons as they transition from the tropics to the midlatitudes; data to advance near-real-time hazard assessment for floods, landslides, and droughts; inputs to improve weather and climate models; and insights into agricultural productivity, famine, and public health. Since launch, GPM teams have calibrated satellite instruments, refined precipitation retrieval algorithms, expanded science investigations, and processed and disseminated precipitation data for a range of applications. The current status of GPM, its ongoing science, and its future plans are presented.
    Keywords: Meteorology and Climatology
    Type: GSFC-E-DAA-TN49071 , Bulletin of the American Meteorological Society (ISSN 0003-0007) (e-ISSN 1520-0477); 98; 8; 1679–1695
    Format: application/pdf
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