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Optical system design and integration of the Global Ecosystem Dynamics Investigation Lidar
Author(s): Shane Wake; Luis A. Ramos-Izquierdo; Bente Eegholm; Peter Dogoda; Zachary Denny; Michael Hersh; Michael Mulloney; W. Joe Thomes; Melanie N. Ott; Hali Jakeman; Demetrios Poulios; Peter Mule; Erich de Leon; J. Bryan Blair
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Paper Abstract

The Global Ecosystem Dynamics Investigation (GEDI) instrument was designed, built, and tested in-house at NASA’s Goddard Space Flight Center and launched to the International Space Station (ISS) on December 5, 2018. GEDI is a multibeam waveform LiDAR (light detection and ranging) designed to measure the Earth’s global tree height and canopy density using 8 laser beam ground tracks separated by roughly 600 meters. Given the ground coverage required and the 2 year mission duration, a unique optical design solution was developed. GEDI generates 8 ground sampling tracks from 3 transmitter systems viewed by a single receiver telescope, all while maximizing system optical efficiency and transmitter to receiver boresight alignment margin. The GEDI optical design, key optical components, and system level integration and testing are presented here. GEDI began 2 years of science operations in March 2019 and so far, it is meeting all of its key optical performance requirements and is returning outstanding science.

Paper Details

Date Published: 9 September 2019
PDF: 13 pages
Proc. SPIE 11128, Infrared Remote Sensing and Instrumentation XXVII, 111280J (9 September 2019); doi: 10.1117/12.2530653
Show Author Affiliations
Shane Wake, NASA Goddard Space Flight Ctr. (United States)
Luis A. Ramos-Izquierdo, NASA Goddard Space Flight Ctr. (United States)
Bente Eegholm, NASA Goddard Space Flight Ctr. (United States)
Peter Dogoda, Sigma Space Corp. (United States)
Zachary Denny, Science Systems and Applications, Inc. (United States)
Michael Hersh, NASA Goddard Space Flight Ctr. (United States)
Michael Mulloney, Stinger Ghaffarian Technologies Inc. (United States)
W. Joe Thomes, NASA Goddard Space Flight Ctr. (United States)
Melanie N. Ott, NASA Goddard Space Flight Ctr. (United States)
Hali Jakeman, NASA Goddard Space Flight Ctr. (United States)
Demetrios Poulios, American Univ. (United States)
Peter Mule, NASA Goddard Space Flight Ctr. (United States)
Erich de Leon, NASA Goddard Space Flight Ctr. (United States)
J. Bryan Blair, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 11128:
Infrared Remote Sensing and Instrumentation XXVII
Marija Strojnik; Gabriele E. Arnold, Editor(s)

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