B029-03
GEDI Measurements of Topography, Height and 3D Structure Measurements

Tuesday, 8 December 2020: 20:38
Virtual
Michelle A Hofton, University of Maryland College Park, College Park, MD, United States, James Bryan Blair, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Sarah Story, SGT, Greenbelt, MD, United States, Hao Tang, University of Maryland College Park, Geographical Sciences, College Park, MD, United States, Carlos Edibaldo Silva, UFRN Federal University of Rio Grande do Norte, Natal, Brazil, John David Armston, University of Queensland, St Lucia, United States and Ralph Dubayah, Univ Maryland, College Park, MD, United States
Recorded Presentation
Abstract:
The Global Ecosystem Dynamics Investigation (GEDI), collecting science data on the International Space Station since April 2019, is a medium-footprint (25m diameter) laser altimeter system measuring surface topography, 3d vertical extent and structure. Utilizing 8 beams, a total of 10 billion measurements are expected after 2 years on orbit. GEDI utilizes a waveform-based approach to record surface structure within each laser footprint. Here we provide an overview of the Level2A data products, and describe the algorithms used to derive surface elevation, height and structure measurements from the GEDI waveforms. Validation of the data products are also presented involving GEDI to GEDI crossovers and GEDI to full-waveform airborne lidar observations collected using NASA's LVIS Facility.
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