Seminar 'The Global Ecosystem Dynamics Investigation (GEDI): Mission Status and Science Challenges'

For whom
Students, Employees
05-03-2018 from 11:00 to 12:00
Room B0.037, Campus Coupure, Coupure Links 653, 9000 Ghent, Belgium
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You are cordially invited to the seminar of Dr. John Armston (University of Maryland, College Park, USA) organized by CAVElab in the framework of the belspo project 3D-FOREST. This is the first out of two seminars about the upcoming NASA GEDI mission.


NASA's Global Ecosystem Dynamics Investigation (GEDI) lidar mission is designed to meet future requirements for space-based observations of carbon and biodiversity and is scheduled for launch in early 2019 for deployment on the International Space Station. GEDI will provide more than 12 billion observations of canopy height, vertical structure and topography using a 10-beam lidar optimized for ecosystem measurements.

This presentation will provide an update on the status of the GEDI mission and science challenges in using a full-waveform sampling lidar to measure forest height, cover and biomass at a global scale.

The success of GEDI depends on the measurement of vertical canopy profiles over the Earths tropical and temperate forests over a two year period and development of calibration equations that relate these measurements to biomass at a variety of spatial scales. GEDI creates these calibrations by combining a large global database of field plot measurements with coincident airborne, drone and terrestrial laser scanning observations that are used to simulate GEDI lidar waveforms. GEDI uses these relatively sparse footprint estimates of structure and biomass to create lower resolution, but spatially continuous grids of structure and biomass.

In collaboration with other current and upcoming satellite missions (DLR TanDEM-X, ESA BIOMASS, NASA/ISRO NISAR), GEDI is also developing radar/lidar fusion algorithms to produce higher resolution, spatially continuous estimates of canopy height and biomass. The success of these efforts will depend on enhanced coordination of inter-mission calibration and validation activities, underpinned by an expanding network of in situ field observations such as that being implemented by GEDI.