Simultaneous analog and photon counting detection for Raman lidar

Journal Article · Fri Jul 10 00:00:00 EDT 2009 · Applied Optics, 48(20):3903-3914

DOI:https://doi.org/10.1364/AO.48.003903· OSTI ID:965566

Newsom, Rob K; Turner, David D; Mielke, Bernd; Clayton, Marian F; Ferrare, Richard; Sivaraman, Chitra

The Atmospheric Radiation Measurement program Raman Lidar was upgraded in 2004 with a new data system that provides simultaneous measurements of both the photomultiplier analog output voltage and photon counts. This paper describes recent improvements to the algorithm used to merge these two signals into a single signal with improved dynamic range. The impact of modifications to the algorithm are evaluated by comparing profiles of water vapor mixing ratio from the lidar with sonde measurements. The modifications that were implemented resulted in a reduction of the mean bias in the daytime mixing ratio from a 4% dry bias to well within 1%.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 965566
• Report Number(s): PNNL-SA-62493; 830403000
• Journal Information: Applied Optics, 48(20):3903-3914, Journal Name: Applied Optics, 48(20):3903-3914 Journal Issue: 20 Vol. 48; ISSN APOPAI; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
DETECTION
MIXING RATIO
MODIFICATIONS
OPTICAL RADAR
PHOTOMULTIPLIERS
PHOTONS
PROBES
RADIATIONS
WATER VAPOR