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    • GEDI L1B Geolocated Waveform Data Global Footprint Level V002

    Metadata Updated: February 25, 2025

    The Global Ecosystem Dynamics Investigation (GEDI) mission aims to characterize ecosystem structure and dynamics to enable radically improved quantification and understanding of the Earth’s carbon cycle and biodiversity. The GEDI instrument produces high resolution laser ranging observations of the 3-dimensional structure of the Earth. GEDI is attached to the International Space Station (ISS) and collects data globally between 51.6° N and 51.6° S latitudes at the highest resolution and densest sampling of any light detection and ranging (lidar) instrument in orbit to date. Each GEDI Version 2 granule encompasses one-fourth of an ISS orbit and includes georeferenced metadata to allow for spatial querying and subsetting.

    The GEDI instrument was removed from the ISS and placed into storage on March 17, 2023. No data were acquired during the hibernation period from March 17, 2023, to April 24, 2024. GEDI has since been reinstalled on the ISS and resumed operations as of April 25, 2024.

    The GEDI Level 1B Geolocated Waveforms product (GEDI01_B) provides geolocated corrected and smoothed waveforms, geolocation parameters, and geophysical corrections for each laser shot for all eight GEDI beams. GEDI01_B data are created by geolocating the GEDI01_A raw waveform data. The GEDI01_B product is provided in HDF5 format and has a spatial resolution (average footprint) of 25 meters.

    The GEDI01_B data product contains 85 layers for each of the eight beams including the geolocated corrected and smoothed waveform datasets and parameters and the accompanying ancillary, geolocation, and geophysical correction. Additional information can be found in the GEDI L1B Product Data Dictionary.

    Known Issues

    • Data acquisition gaps: GEDI data acquisitions were suspended on December 19, 2019 (2019 Day 353) and resumed on January 8, 2020 (2020 Day 8).
    • Incorrect Reference Ground Track (RGT) number in the filename for select GEDI files: GEDI Science Data Products for six orbits on August 7, 2020, and November 12, 2021, had the incorrect RGT number in the filename. There is no impact to the science data, but users should reference this document (https://lpdaac.usgs.gov/documents/2236/GEDI_CORRECTED_RGT_FILENAMES.pptx) for the correct RGT numbers.
    • Known Issues: Section 8 of the User Guide provides additional information on known issues.

    Improvements/Changes from Previous Versions

    • Metadata has been updated to include spatial coordinates.
    • Granule size has been reduced from one full ISS orbit (~7.99 GB) to four segments per orbit (~2.00 GB).
    • Filename has been updated to include segment number and version number.
    • Improved geolocation for an orbital segment.
    • Added elevation from the SRTM digital elevation model for comparison.
    • Modified the method to predict an optimum algorithm setting group per laser shot.
    • Added additional land cover datasets related to phenology, urban infrastructure, and water persistence.
    • Added selected_mode_flag dataset to root beam group using selected algorithm.
    • Removed shots when the laser is not firing.
    • Modified file name to include segment number and dataset version.

    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 March 28, 2024
    Metadata Updated Date February 25, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Browse image for Earthdata Search

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 28, 2024
    Metadata Updated Date February 25, 2025
    Publisher LP DAAC
    Maintainer
    Identifier C2142749196-LPCLOUD
    Data First Published 2021-04-16
    Language en-US
    Data Last Modified 2024-04-04
    Category GEDI, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Ralph Dubayah, Scott Luthcke, James Blair, Michelle Hofton, John Armston, Hao Tang. 2021-04-16. GEDI L1B Geolocated Waveform Data Global Footprint Level V002. Sioux Falls, South Dakota, USA. Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes Distributed Active Archive Center. https://doi.org/10.5067/GEDI/GEDI01_B.002. https://doi.org/10.5067/GEDI/GEDI01_B.002. The DOI landing page provides citations in APA and Chicago..
    Creator Ralph Dubayah, Scott Luthcke, James Blair, Michelle Hofton, John Armston, Hao Tang
    Graphic Preview Description Browse image for Earthdata Search
    Graphic Preview File https://data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/GEDI01_B.002/GEDI01_B_2023075170425_O24113_02_T00409_02_005_02_V002/GEDI01_B_2023075170425_O24113_02_T00409_02_005_02_V002.png
    Harvest Object Id c273a201-7ceb-4983-969f-ff1f733fe906
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/GEDI/GEDI01_B.002
    Metadata Type geospatial
    Old Spatial -180.0 -54.0 180.0 54.0
    Program Code 026:001
    Release Place Sioux Falls, South Dakota, USA
    Source Datajson Identifier True
    Source Hash b4d2380d80c9cbdc9703e731a71101b797774eba715b7aa6fe50dc676240275d
    Source Schema Version 1.1
    Spatial
    Temporal 2019-04-04T00:00:00Z/2025-02-24T00:00:00Z

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