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    • DAWN GRAND MAP CERES TPE NEUTRON COUNTS V1.0

    Metadata Updated: August 22, 2025

    A global map thermal+epithermal neutron counting rates binned on twenty-degree quasi-equal-area pixels is provided. The map was determined from a time series of the rate of neutron capture by lithium in the lithium-loaded glass scintillator, part of the +Z phoswich sensor on Dawn's Gamma Ray and Neutron Detector (GRaND). Neutrons in the thermal and epithermal energy range contribute to the reaction. The data were acquired while in low altitude mapping orbit, about 385 km from Ceres' surface (about 0.8 body radii altitude). Prior to mapping, the time series counting data were subjected to corrections for variations in the flux of galactic cosmic rays and measurement geometry, as described by PRETTYMANETAL2017.

    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

    References

    https://pds.nasa.gov

    Dates

    Metadata Created Date January 31, 2023
    Metadata Updated Date August 22, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 31, 2023
    Metadata Updated Date August 22, 2025
    Publisher National Aeronautics and Space Administration
    Maintainer
    Identifier urn:nasa:pds:context_pds3:data_set:data_set.dawn-a-grand-5-ceres-tpe-counts-v1.0_nyzy-znr5
    Data First Published 2018-06-26
    Data Last Modified 2025-07-17
    Category Earth Science
    Public Access Level public
    Data Update Frequency irregular
    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 78952feb-638f-489d-97ba-2f2d404ecd21
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://pds.nasa.gov/ds-view/pds/viewDataset.jsp?dsid=DAWN-A-GRAND-5-CERES-TPE-COUNTS-V1.0
    Program Code 026:005
    Related Documents https://pds.nasa.gov
    Source Datajson Identifier True
    Source Hash 9675f16a7a851aaa8775594ac6e7463861aacf28e6f8dbfeb2b5f2b3fc7f52a3
    Source Schema Version 1.1

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