GEDI’s precise measurements of forest canopy height, canopy vertical structure, and surface elevation greatly advance our ability to characterize important carbon and water cycling processes, biodiversity, and habitat. The Global Ecosystem Dynamics Investigation (GEDI) produces high-resolution laser ranging observations of the 3D structure of the Earth. Project: Global Ecosystem Dynamics Investigation Also included are two companion files in Portable Document Format (*.pdf). Each file provides 1 km estimates of mean aboveground biomass density for the period to (mission week 19 to mission week 138). There are 10 data files in cloud-optimized GeoTIFF (*.tif) format included in this dataset. The GEDI beam transects are spaced approximately 600 m apart on the Earth’s surface in the cross-track direction, for an across-track width of ~4.2 km. The GEDI instrument consists of three lasers producing a total of eight beam ground transects, which consist of ~25 m footprint samples spaced approximately every 60 m along-track. GEDI 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. GEDI was launched on December 5, 2018, and is attached to the International Space Station (ISS). The GEDI instrument produces high-resolution laser ranging observations of the 3-dimensional structure of the Earth. Uncertainty is due to both GEDI's sampling of the 1 km area (as opposed to making wall-to-wall observations) and the fact that L4A biomass values are modeled in a process subject to error instead of measured in a process that may be assumed to be error-free. Corresponding 1 km estimates of the standard error of the mean are also provided in the L4B product. (2019) describes the hybrid model-based mode of inference used in the L4B product. The gridding procedure is described in the GEDI L4B Algorithm Theoretical Basis Document (ATBD). The GEDI L4A Footprint Biomass product converts each high-quality waveform to an AGBD prediction, and the L4B product uses the sample present within the borders of each 1 km cell to statistically infer mean AGBD. This Global Ecosystem Dynamics Investigation (GEDI) L4B product provides 1 km x 1 km (1 km, hereafter) estimates of mean aboveground biomass density (AGBD) based on observations from mission week 19 starting on to mission week 138 ending on. Airborne Visible InfraRed Imaging Spectrometer (AVIRIS).Active Sensing of CO2 Emissions over Nights, Days, and Seasons (ASCENDS) Airborne Campaign.CARbon Atmosphere Flux Experiment (CARAFE).MODIS/ASTER Airborne Simulator (MASTER).Global Ecosystem Dynamics Investigation (GEDI).Accelerated Canopy Chemistry Program (ACCP).Atmospheric Carbon and Transport - America (ACT-America).Airborne Microwave Observatory of Subcanopy and Subsurface (AirMOSS).Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE).Arctic-Boreal Vulnerability Experiment (ABoVE).Atmospheric Tracer Transport Model Intercomparison Project (TransCom).International Satellite Land Surface Climatology Project (ISLSCP II).Vegetation-Ecosystem Modeling and Analysis Project (VEMAP).Boreal Ecosystem-Atmosphere Study (BOREAS).Southern African Regional Science Initiative Project (SAFARI 2000).Oregon Transect Ecosystem Research Project (OTTER).Large Scale Biosphere-Atmosphere Experiment (LBA-ECO).
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