31 October 1997 Advanced detectors, optics, and waveform digitizers for aircraft DIAL water vapor measurements
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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.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Russell J. De Young, Gary E. Halama, William S. Luck, K. Scott Ellis, Stephen P. Sandford, Edward V. Browell, Tamer F. Refaat, "Advanced detectors, optics, and waveform digitizers for aircraft DIAL water vapor measurements", Proc. SPIE 3127, Application of Lidar to Current Atmospheric Topics II, (31 October 1997); doi: 10.1117/12.279067; https://doi.org/10.1117/12.279067
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KEYWORDS
Sensors

Avalanche photodetectors

Information operations

LIDAR

Receivers

Signal to noise ratio

Telescopes

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