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    • GPM DPR Ka-band Received Power L1B 1.5 hours 5 km V07 (GPM_PRL1KA) at GES DISC

    Metadata Updated: April 11, 2025

    Version 07 is the current version of the data set. Older versions are no longer available and have been superseded by Version 07.

    This product contains the calibrated received power from the Ka-band of the Dual-frequency Precipitation Radar (DPR) aboard the core satellite of the Global Precipitation Measurement (GPM) mission.

    One of the reasons for adding the Ka-band frequency (35.5 GHz) channel to the DPR is to provide information on the drop-size distribution that can be obtained from non-Rayleigh scattering effects at the higher frequency. Another reason for the new Ka-band channel is to provide more accurate estimates of the phase-transition height in precipitating systems. This information is very important not only in increasing the accuracy of rain rate estimation by the DPR itself, but in improving rain estimation by passive microwave radiometers.

    The Ka-band Radar has a more complex scanning geometry, defined by two modes: Matched (MS) and High-sensitivity (HS). In the first type of scan (MS), the Ka Radar beams are matched to the central 25 beams of the Ku Radar, providing a swath of 120 km (within the 245km swath of the Ku Radar). In the second type of scan (HS), the Ka is operated in the high-sensitivity mode to detect light rain and snow. In this case, its beams are interlaced within the matched scan pattern, resulting in 49 cross-track beams which, however, still cover the 120-km swath.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date December 1, 2022
    Metadata Updated Date April 11, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 1, 2022
    Metadata Updated Date April 11, 2025
    Publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
    Maintainer
    Identifier C2179064667-GES_DISC
    Data First Published 2021-12-06
    Language en-US
    Data Last Modified 2025-03-31
    Category GPM, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 0c8242ce-ca9a-4251-8668-fe9349320384
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://cmr.earthdata.nasa.gov:443/search/concepts/C2179064667-GES_DISC.html
    Metadata Type geospatial
    Old Spatial -180.0 -70.0 180.0 70.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash d3afb6a5c3bb3c55e1a5086e1a7e5ea3abad36d4867bb49bfea859a8d4c75854
    Source Schema Version 1.1
    Spatial
    Temporal 2014-03-08T00:00:00Z/2023-03-01T00:00:00Z

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