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Proceedings Paper

Advanced detectors, optics, and waveform digitizers for aircraft DIAL water vapor measurements
Author(s): Russell J. De Young; Gary E. Halama; William S. Luck; K. Scott Ellis; Stephen P. Sandford; Edward V. Browell; Tamer F. Refaat
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Paper Abstract

NASA Langley has an active water vapor differential absorption lidar program taking measurements from both C-130 and ER-2 aircraft. A research effort has started to increase the signal-to-noise ratio in the DIAL receiver by 1) evaluating new very low noise avalanche photo didoes (APD), 2) designing an optics system that will focus the return light signal to the APD efficiently and 3) constructing a 10-MHz waveform digitizer board that will be small enough to be placed at the APD and telescope. With these advances we anticipate improving the signal-to-noise ratio by a factor of ten over the current receiver system.

Paper Details

Date Published: 31 October 1997
PDF: 13 pages
Proc. SPIE 3127, Application of Lidar to Current Atmospheric Topics II, (31 October 1997); doi: 10.1117/12.279067
Show Author Affiliations
Russell J. De Young, NASA Langley Research Ctr. (United States)
Gary E. Halama, NASA Langley Research Ctr. (United States)
William S. Luck, NASA Langley Research Ctr. (United States)
K. Scott Ellis, NASA Langley Research Ctr. (United States)
Stephen P. Sandford, NASA Langley Research Ctr. (United States)
Edward V. Browell, NASA Langley Research Ctr. (United States)
Tamer F. Refaat, Old Dominion Univ. (United States)


Published in SPIE Proceedings Vol. 3127:
Application of Lidar to Current Atmospheric Topics II
Arthur J. Sedlacek; Kenneth W. Fischer, Editor(s)

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