Laser imaging nephelometer for aircraft deployment
-
Published:2022-03-04
Issue:5
Volume:15
Page:1093-1105
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Ahern Adam T.ORCID, Erdesz Frank, Wagner Nicholas L., Brock Charles A.ORCID, Lyu Ming, Slovacek Kyra, Moore Richard H.ORCID, Wiggins Elizabeth B., Murphy Daniel M.
Abstract
Abstract. Validation of remote sensing retrievals of aerosol microphysical and optical properties requires in situ measurements of the same properties. We present here an improved imaging nephelometer for measuring the directionality and polarization of light (i.e., polarimetry) scattered at two wavelengths (405 and 660 nm) with high temporal resolution. The
instrument was designed for airborne deployment and is capable of
ground-based measurements as well. The laser imaging nephelometer (LiNeph)
uses two orthogonal detectors with wide-angle lenses and linearly polarized
light sources to measure both the phase function, P11(θ), and
degree of linear polarization, -P12/P11(θ). In this work,
we will describe the instrument function and calibration, as well as data
acquisition and reduction. The instrument was first deployed aboard the NASA DC-8 during the 2019 FIREX-AQ campaign. Here, we present field measurements of smoke plumes that show that the LiNeph has sufficient resolution for 0.24 Hz polarimetric measurements at two wavelengths, 405 and 660 nm, at integrated scattering coefficients ranging from 50–8000 Mm−1.
Funder
National Aeronautics and Space Administration National Oceanic and Atmospheric Administration
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference31 articles.
1. Andrews, E., Sheridan, P. J., Fiebig, M., McComiskey, A., Ogren, J. A.,
Arnott, P., Covert, D., Elleman, R., Gasparini, R., Collins, D., Jonsson,
H., Schmid, B., and Wang, J.: Comparison of methods for deriving aerosol
asymmetry parameter, J. Geophys. Res., 111, D05S04,
https://doi.org/10.1029/2004JD005734, 2006. 2. Bohren, C. F. and Huffman, D. R.: Absorption and scattering of light by
small particles, Wiley, New York, xiv, 530 pp., https://doi.org/10.1002/9783527618156, 1983. 3. Chen, G., Ziemba, L., Chu, D., Thornhill, K., Schuster, G., Winstead, E.,
Diskin, G., Ferrare, R., Burton, S., and Ismail, S.: Observations of Saharan
dust microphysical and optical properties from the Eastern Atlantic during
NAMMA airborne field campaign, Atmos. Chem. Phys., 11, 723–740,
https://doi.org/10.5194/acp-11-723-2011, 2011. 4. Dolgos, G.: Polarized imaging nephelometer development and applications on aircraft, University of Maryland, Baltimore County, ProQuest Dissertations Publishing, UMI 3668705, 2014. 5. Dolgos, G. and Martins, J. V.: Polarized Imaging Nephelometer for in situ
airborne measurements of aerosol light scattering, Opt. Express, 22,
21972–21990, https://doi.org/10.1364/Oe.22.021972, 2014.
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|