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Proceedings Paper

Lab demonstration of the hybrid Doppler wind lidar (HDWL) transceiver
Author(s): Catherine T. Marx; Bruce Gentry; Patrick Jordan; Peter Dogoda; Edward Faust; Michael Kavaya
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Paper Abstract

The recommended design approach for the 3D Tropospheric Winds mission is a hybrid Doppler lidar which combines the best elements of both a coherent aerosol Doppler lidar operating at 2 μm and a direct detection molecular Doppler lidar operating at 0.355 μm. In support of the mission, we built a novel, compact, light-weighted multi-field of view transceiver where multiple telescopes are used to cover the required four fields of view. A small mechanism sequentially selects both the “transmit” and “receive” fields of view. The four fields are combined to stimulate both the 0.355 μm receiver and the 2 μm receiver. This version is scaled (0.2 m diameter aperture) from the space-based version but still demonstrates the feasibility of the hybrid approach. The primary mirrors were conventionally light-weighted and coated with dielectric, high reflectivity coatings with high laser damage thresholds at both 2 μm and 0.355 μm. The mechanical structure and mounts were fabricated from composites to achieve dimensional stability while significantly reducing the mass. In the laboratory, we demonstrated the system level functionality at 0.355 μm and at 2 μm, raising the Technology Readiness Level (TRL) from 2 to 4.

Paper Details

Date Published: 17 September 2013
PDF: 11 pages
Proc. SPIE 8872, Lidar Remote Sensing for Environmental Monitoring XIV, 887207 (17 September 2013); doi: 10.1117/12.2029649
Show Author Affiliations
Catherine T. Marx, NASA Goddard Space Flight Ctr. (United States)
Bruce Gentry, NASA Goddard Space Flight Ctr. (United States)
Patrick Jordan, NASA Goddard Space Flight Ctr. (United States)
Peter Dogoda, Sigma Space Corp. (United States)
NASA Goddard Space Flight Ctr. (United States)
Edward Faust, SGT, Inc. (United States)
NASA Goddard Space Flight Ctr. (United States)
Michael Kavaya, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 8872:
Lidar Remote Sensing for Environmental Monitoring XIV
Upendra N. Singh, Editor(s)

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