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Proceedings Paper

Comparison of aerosol backscatter and wind field estimates from the REAL and the SAMPLE
Author(s): Shane D. Mayor; Pierre Dérian; Christopher F. Mauzey; Scott M. Spuler; Patrick Ponsardin; Jeff Pruitt; Darrell Ramsey; Noah S. Higdon
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Paper Abstract

Although operating at the same near-infrared 1.5- m wavelength, the Raman-shifted Eye-safe Aerosol Lidar (REAL) and the Scanning Aerosol Micro-Pulse Lidar-Eye-safe (SAMPLE) are very different in how they generate and detect laser radiation. We present results from an experiment where the REAL and the SAMPLE were operated side-by-side in Chico, California, in March of 2015. During the non-continuous, eleven day test period, the SAMPLE instrument was operated at maximum pulse repetition frequency (15 kHz) and integrated over the interpulse period of the REAL (0.1 s). Operation at the high pulse repetition frequency resulted in second trip echoes which contaminated portions of the data. The performance of the SAMPLE instrument varied with background brightness--as expected with a photon counting receiver|--yet showed equal or larger backscatter intensity signal to noise ratio throughout the intercomparison experiment. We show that a modest low-pass filter or smooth applied to the REAL raw waveforms (that have 5x higher range resolution) results in significant increases in raw signal-to-noise ratio and image signal-to-noise ratio--a measure of coherent aerosol feature content in the images resulting from the scans. Examples of wind fields and time series of wind estimates from both systems are presented. We conclude by reviewing the advantages and disadvantages of each system and sketch a plan for future research and development activities to optimize the design of future systems.

Paper Details

Date Published: 1 September 2015
PDF: 13 pages
Proc. SPIE 9612, Lidar Remote Sensing for Environmental Monitoring XV, 96120G (1 September 2015); doi: 10.1117/12.2187538
Show Author Affiliations
Shane D. Mayor, California State Univ., Chico (United States)
Pierre Dérian, California State Univ., Chico (United States)
Christopher F. Mauzey, California State Univ., Chico (United States)
Scott M. Spuler, National Ctr. for Atmospheric Research (United States)
Patrick Ponsardin, Spectral Sensor Solutions, LLC (United States)
Jeff Pruitt, Spectral Sensor Solutions, LLC (United States)
Darrell Ramsey, Spectral Sensor Solutions, LLC (United States)
Noah S. Higdon, Spectral Sensor Solutions, LLC (United States)


Published in SPIE Proceedings Vol. 9612:
Lidar Remote Sensing for Environmental Monitoring XV
Upendra N. Singh, Editor(s)

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