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A New Airborne Laser-induced Fluorescence Instrument for in Situ Detection of Formaldehyde Throughout the Troposphere and Lower Stratosphere : Volume 7, Issue 8 (19/08/2014)

By Cazorla, M.

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Book Id: WPLBN0004000309
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: A New Airborne Laser-induced Fluorescence Instrument for in Situ Detection of Formaldehyde Throughout the Troposphere and Lower Stratosphere : Volume 7, Issue 8 (19/08/2014)  
Author: Cazorla, M.
Volume: Vol. 7, Issue 8
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Swanson, A. K., Bailey, S. A., Wolfe, G. M., Hanisco, T. F., Arkinson, H. L., & Cazorla, M. (2014). A New Airborne Laser-induced Fluorescence Instrument for in Situ Detection of Formaldehyde Throughout the Troposphere and Lower Stratosphere : Volume 7, Issue 8 (19/08/2014). Retrieved from

Description: Atmospheric Chemistry and Dynamics Lab, NASA Goddard Space Flight Center, Greenbelt, MD, USA. The NASA In Situ Airborne Formaldehyde (ISAF) instrument is a high-performance laser-based detector for gas phase formaldehyde (HCHO). ISAF uses rotational-state specific laser excitation at 353 nm for laser-induced fluorescence (LIF) detection of HCHO. A number of features make ISAF ideal for airborne deployment, including (1) a compact, low-maintenance fiber laser, (2) a single-pass design for stable signal response, (3) a straightforward inlet design, and (4) a standalone data acquisition system. A full description of the instrument design is given, along with detailed performance characteristics. The accuracy of reported mixing ratios is ±10% based on calibration against IR and UV absorption of a primary HCHO standard. Precision at 1 Hz is typically better than 20% above 100 pptv, with uncertainty in the signal background contributing most to variability at low mixing ratios. The 1 Hz detection limit for a signal/noise ratio of 2 is 36 pptv for 10 mW of laser power, and the e-fold time response at typical sample flow rates is 0.19 s. ISAF has already flown on several field missions and platforms with excellent results.

A new airborne laser-induced fluorescence instrument for in situ detection of Formaldehyde throughout the troposphere and lower stratosphere

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