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Proceedings Paper

Requirements and technology advances for global wind measurement with a coherent lidar: a shrinking gap
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Paper Abstract

Early concepts to globally measure vertical profiles of vector horizontal wind from space planned on an orbit height of 525 km, a single pulsed coherent Doppler lidar system to cover the full troposphere, and a continuously rotating telescope/scanner that mandated a vertical line of sight wind profile from each laser shot. Under these conditions system studies found that laser pulse energies of approximately 20 J at 10 Hz pulse repetition rate with a rotating telescope diameter of approximately 1.5 m was required. Further requirements to use solid state laser technology and an eyesafe wavelength led to the relatively new 2-micron solid state laser. With demonstrated pulse energies near 20 mJ at 5 Hz, and no demonstration of a rotating telescope maintaining diffraction limited performance in space, the technology gap between requirements and demonstration was formidable. Fortunately the involved scientists and engineers set out to reduce the gap, and through a combination of clever ideas and technology advances over the last 15 years, they have succeeded. This paper will detail the gap reducing factors and will present the current status.

Paper Details

Date Published: 26 September 2007
PDF: 8 pages
Proc. SPIE 6681, Lidar Remote Sensing for Environmental Monitoring VIII, 668106 (26 September 2007); doi: 10.1117/12.737428
Show Author Affiliations
Michael J. Kavaya, NASA Langley Research Ctr. (United States)
Jirong Yu, NASA Langley Research Ctr. (United States)
Grady J. Koch, NASA Langley Research Ctr. (United States)
Farzin Amzajerdian, NASA Langley Research Ctr. (United States)
Upendra N. Singh, NASA Langley Research Ctr. (United States)
G. David Emmitt, Simpson Weather Associates (United States)

Published in SPIE Proceedings Vol. 6681:
Lidar Remote Sensing for Environmental Monitoring VIII
Upendra N. Singh, Editor(s)

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