GPM SAPHIR on MT1 (PRPS) Climate-based Radiometer Precipitation Profiling L3 1 month 0.25 x 0.25 degree V06 (GPM_3PRPSMT1SAPHIR_CLIM) at GES DISC

Description

The "CLIM" products differ from their "regular" counterparts (without the "CLIM" in the name) by the ancillary data they use. They are Climate-Reference products, which requires homogeneous ancillary data over the climate time series. Hence, the ECMWF-Interim (European Centre for Medium-Range Weather Forecasts, 2-3 months lag behind the regular production) reanalysis is used as ancillary data to derive surface and atmospheric conditions required by the GPROF algorithm for the "CLIM" output. The Precipitation Retrieval and Profiling Scheme (PRPS)is designed to provide a best estimate of precipitation based upon matched SAPHIR-DPR observations. This fulfils in part the essence of GPM (and its predecessor, TRMM) in which the core observatory acts as a calibrator of precipitation retrievals for the international constellation of passive microwave instruments. In doing so the retrievals from the partner constellation sensors are able to provide greater temporal sampling and great spatial coverage than is possible from the DPR instrument alone. However, the limitations of the DPR instrument are transferred through the retrieval scheme to the resulting precipitation products. Fundamental to the design of the PRPS is the independence from any dynamic ancillary data sets: the retrieval is based solely upon the satellite radiances, a static a priori radiance-rainrate database (and index), and (static) topographical data. Critically, the technique is independent of any model information, unlike the retrievals generated through the Goddard PROFiling (GPROF) scheme: this independence is advantageous when generating products across time scales from near real-time (inaccessibility to model data) to climatological scales (circumventing trends in model data). The algorithm is designed to generate instantaneous estimates of precipitation at a constant resolution (regardless of scan position), for all scan positions and scan lines. In addition to the actual precipitation estimate, an assessment of the error is made, and a measure of the ‘fit’ of the observations to the database provided. A quality flag is also provided, with any bad data generating a ‘missing flag’ in the retrieval.

Resources

Name Format Description Link
33 README Document https://gpm1.gesdisc.eosdis.nasa.gov/data/GPM_L3/doc/README.GPM.pdf
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/GPM_3PRPSMT1SAPHIR_CLIM_06.html
21 Access the data via the OPeNDAP protocol. https://gpm1.gesdisc.eosdis.nasa.gov/opendap/GPM_L3/GPM_3PRPSMT1SAPHIR_CLIM.06/contents.html
21 GPM Project Home Page https://gpm.nasa.gov
33 The PRPS Algorithm Theoretical Base Document https://pps.gsfc.nasa.gov/Documents/20180203_SAPHIR-ATBD.pdf
21 All available GPM Algorithm Theoretical Base Documents https://pps.gsfc.nasa.gov/atbd.html
21 Instrument Description https://www.star.nesdis.noaa.gov/mirs/saphir.php
21 GPM and partner sensors anomalous events https://gpmweb2https.pps.eosdis.nasa.gov/tsdis/AB/docs/gpm_anomalous.html
21 Use the Earthdata Search Client to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=GPM_3PRPSMT1SAPHIR_CLIM_06
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FGPM%2FSAPHIR%2FMT1%2FPRPSCLIM%2F3A-MONTH%2F06
34 GPM SAPHIR on MT1 (PRPS) Radiometer Precipitation Profiling L3 1 month 0.25 x 0.25 degree (GPM_3PRPSMT1SAPHIR) https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/GPM_3PRPSMT1SAPHIR.png
21 Access the data via HTTPS https://gpm1.gesdisc.eosdis.nasa.gov/data/s4pa/GPM_L3/GPM_3PRPSMT1SAPHIR_CLIM.06/

Tags

  • precipitation
  • atmospheric-water-vapor
  • atmosphere
  • earth-science

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