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 |
|---|---|---|---|
| View this dataset's algorithm theoretical basis document | HTML | The Waveform Processing ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. | Open resource |
| View this dataset's algorithm theoretical basis document | HTML | The Geolocation ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. | Open resource |
| This dataset's landing page | HTML | The product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc. | Open resource |
| Download this dataset through a directory map | HTML | LP DAAC Data Pool provides direct access to available products via HTTPS. | Open resource |
| Get a related visualization | PNG | Browse image for Earthdata Search | Open resource |
| The dataset's project home page | HTML | The GEDI website provides detailed information on the GEDI mission, instrument, science, applications, and data. | Open resource |
| View this dataset's how-to documentation | HTML | Spatial Querying of GEDI Version 2 Data in Python | Open resource |
| View this dataset's how-to documentation | HTML | Spatial Querying of GEDI Version 2 Data in R | Open resource |
| View this dataset's how-to documentation | HTML | GEDI Spatial and Band/Layer Subsetting and Export to GeoJSON Script | Open resource |
| The dataset's project home page | HTML | The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products. | Open resource |
| View documentation related to this dataset | HTML | The data dictionary provides additional information on the Science Dataset (SDS) layers. | Open resource |
| View this dataset's how-to documentation | GEDI Spatial Querying and Subsetting Quick Guide | Open resource | |
| View this dataset's user's guide | The technical information in the User's Guide enables users to interpret and use the data products. | Open resource | |
| View this dataset's how-to documentation | HTML | GEDI L1-L2 Data Resources, Access, and Visualization Demonstration | Open resource |
| View this dataset's how-to documentation | HTML | Getting Started with GEDI L1B Version 2 Data in Python | Open resource |
| Google Scholar search results | HTML | Search results for publications that cite this dataset by its DOI. | Open resource |
| Download this dataset through Earthdata Search | HTML | Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data. | Open resource |