GEDI L1B Geolocated Waveform Data Global Footprint Level V002

Description

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 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. Improvements for Version 2 * Metadata has been updated to include spatial coordinates. * Granule size has been reduced from one full ISS orbit (~5.8 GB) to four segments per orbit (~1.5 GB). * Filename has been updated to include segment number and version number. * Improved Geolocation. * 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.

Resources

Name Format Description Link
21 Getting Started with GEDI L1B Version 2 Data in Python https://lpdaac.usgs.gov/resources/e-learning/getting-started-gedi-l1b-version-2-data-python/
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FGEDI%2FGEDI01_B.002
21 Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data. https://search.earthdata.nasa.gov/search?q=C1908344278-LPDAAC_ECS
21 The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products. https://lpdaac.usgs.gov/
21 The product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc. https://doi.org/10.5067/GEDI/GEDI01_B.002
21 The data dictionary provides additional information on the Science Dataset (SDS) layers. https://lpdaac.usgs.gov/documents/981/gedi_l1b_dictionary_P003_v2.html
21 The Waveform Processing ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. https://doi.org/10.5067/DOC/GEDI/GEDI_WF_ATBD.001
21 The Geolocation ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. https://doi.org/10.5067/DOC/GEDI/GEDI_WFGEO_ATBD.001
21 The GEDI website provides detailed information on the GEDI mission, instrument, science, applications, and data. https://gedi.umd.edu/
33 The technical information in the User's Guide enables users to interpret and use the data products. https://lpdaac.usgs.gov/documents/997/GEDI01B_User_Guide_V21.pdf
21 GEDI Spatial and Band/Layer Subsetting and Export to GeoJSON Script https://git.earthdata.nasa.gov/projects/LPDUR/repos/gedi-subsetter/browse
21 GEDI L1-L2 Data Resources, Access, and Visualization Demonstration https://lpdaac.usgs.gov/resources/e-learning/accessing-and-analyzing-gedi-lidar-data-for-vegetation-studies/
34 Browse image for Earthdata Search https://e4ftl01.cr.usgs.gov//WORKING/BRWS/Browse.001/2021.04.11/GEDI01_B_2020106212107_O07604_03_T02729_02_005_01_V002.png
33 GEDI Spatial Querying and Subsetting Quick Guide https://lpdaac.usgs.gov/documents/989/GEDI_Quick_Guide_V2.pdf
21 Spatial Querying of GEDI Version 2 Data in R https://git.earthdata.nasa.gov/projects/LPDUR/repos/gedi-finder-tutorial-r/browse
21 LP DAAC Data Pool provides direct access to available products via HTTPS. https://e4ftl01.cr.usgs.gov/GEDI/GEDI01_B.002/
21 Spatial Querying of GEDI Version 2 Data in Python https://git.earthdata.nasa.gov/projects/LPDUR/repos/gedi-finder-tutorial-python/browse

Tags

  • topography
  • land-surface
  • spectral-engineering
  • lidar
  • earth-science

Topics

Categories