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    • CDDIS_LLR_data

    Metadata Updated: January 22, 2026

    Lunar Laser Ranging (LLR) measures the distance between the Earth and the Moon using laser ranging. A short pulse of coherent light generated by a laser (Light Amplification by Stimulated Emission of Radiation) is transmitted in a narrow beam to illuminate corner cube retroreflectors on the moon. The return signal, typically a few photons, is collected by a telescope and the time-of-flight is measured. Apollo astronauts and Russian rovers deployed laser ranging retroreflector arrays on the lunar surface which continue to yield fundamental scientific data. Analysis of Lunar Laser Ranging (LLR) data provides information on the lunar orbit, rotation, solid-body tides, and retroreflector locations.

    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 January 31, 2023
    Metadata Updated Date January 22, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 31, 2023
    Metadata Updated Date January 22, 2026
    Publisher NASA/GSFC/SED/ESD/GGL/CDDIS
    Maintainer
    Identifier C1000000019-CDDIS
    Data First Published 1982-01-01
    Language en-US
    Data Last Modified 2025-03-31
    Category ILRS, 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 7b130ec1-c833-4137-a7b7-4249f1638b6a
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://cmr.earthdata.nasa.gov:443/search/concepts/C1000000019-CDDIS.html
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 83dc5b94dca7dfc350bf191fb7997d3f1cd939c5fcf91c5e93d3cce2c55a0e60
    Source Schema Version 1.1
    Spatial
    Temporal 1969-01-01T00:00:00Z/2022-01-17T00:00:00Z

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