DOI: 10.1520/stp25416s. Optical and Electronic Limitations of the Forward-Scattering Spectrometer Probe

Optical and Electronic Limitations of the Forward-Scattering Spectrometer Probe

10.1520/stp25416s

Crossref book-chapter

ASTM International100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959

Liquid Particle Size Measurement Techniques: 2nd Volume (381)

Abstract

An extensive evaluation of the optical and electronic measurement capabilities of the Particle Measurement Systems, Inc., forward-scattering spectrometer probe (FSSP) has led to a better characterization of this probe's measurement limitations. Measurements of droplet distributions are distorted as a result of mis-sizing and undercounting by the FSSP. These measurement errors have been traced to limitations imposed by the response time of the electronics, intensity inhomogeneities of the laser beam, and optical coincidence. The optical and electronic characteristics of the FSSP have been mathematically modeled, and algorithms have been derived for the application of corrections that improve the accuracy of the measurements from these probes. These correction procedures adjust the measured concentrations for the effects of coincidence and deadtime losses and adjust the size distribution for undersizing caused by response time rolloff and laser beam inhomogeneities. This presentation summarizes the operational limitations of this instrument.

Bibliography

Baumgardner, D., Cooper, W., & Dye, J. (1990). Optical and Electronic Limitations of the Forward-Scattering Spectrometer Probe. Liquid Particle Size Measurement Techniques: 2nd Volume, 115â127.

Authors 3

D Baumgardner (first)
WA Cooper (additional)
JE Dye (additional)

References 11 Referenced 16

Pinnick, R. G., Garvey, D. M., and Duncan, L. D., “Calibration of Knollenberg FSSP Light-Scattering Counters for Measurement of Cloud Droplets,” Journal of Applied Meteorology, Vol. 20, 1981, pp. 1049–1057. (10.1175/1520-0450(1981)020<1049:COKFLS>2.0.CO;2)
Baumgardner, D. and Dye, J. E., “Cloud Particle Measurement Symposium: Summaries and Abstracts,” National Center for Atmospheric Research Technical Note NCAR/TN-199+PROC, 1982.
Baumgardner, D., “An Analysis and Comparison of Five Water Droplet Measuring Instruments,” Journal of Applied Meteorology, Vol. 22, 1983, pp. 891–910. (10.1175/1520-0450(1983)022<0891:AAACOF>2.0.CO;2)
Baumgardner, D. and Dye, J. E., “A Discussion of FSSP Data Reduction Techniques,” in Preprints, 1983 AMS 5th Symposium Meteorological Observations and Instrumentation, Toronto, American Meteorological Society, 1983, pp. 334–339.
Cerni, T., “Determination of the Size and Concentration of Cloud Drop with an FSSP,” Journal of Climate and Applied Meteorology 0733-3021, Vol. 22, 1983, pp. 1346–1355. (10.1175/1520-0450(1983)022<1346:DOTSAC>2.0.CO;2)
Dye, J. E. and Baumgardner, D., “Evaluation of the Forward Scattering Spectrometer Probe, Part I: Electronic and Optical Studies,” Journal of Oceanic and Atmospheric Technology, Vol. 1, 1984, pp. 329–344. (10.1175/1520-0426(1984)001<0329:EOTFSS>2.0.CO;2)
Baumgardner, D.,Strapp, W., and Dye, J. E., “Evaluation of the Forward Scattering Spectrometer Probe, Part II: Corrections for Coincidence and Dead-Time Losses,” Journal of Atmospheric and Oceanic Technology 0739-0572, Vol. 2, 1985, pp. 626–632. (10.1175/1520-0426(1985)002<0626:EOTFSS>2.0.CO;2)
Baumgardner, D., Dye, J. E., and Cooper, W. A., “The Effects of Measurement Uncertainties on the Analysis of Cloud Particle Data,” in Preprints, 23rd Conference on Cloud Physics and Radar Meteorology, Snowmass, CO, American Meteorological Society, JP313–316, 1986.
Baumgardner, D., “Corrections for the Response Times of Particle Measuring Probes,” in Preprints, 6th Symposium on Meteorological Observations and Instrumentation, New Orleans, January 12–16, 1987, Boston, MA, American Meteorological Society, pp. 148–151.
10.1016/B978-0-12-350720-4.50007-7 / Clouds, Their Formation, Optical Properties and Effects / Techniques for Probing Cloud Microstructure by Knollenberg (1981)
Cooper, W. A., “Effects of Coincidence on Measurements with a Forward Scattering Spectrometer Probe,” Journal of Atmospheric and Oceanic Technology 0739-0572, Vol. 5, 1988, pp. 823–832. (10.1175/1520-0426(1988)005<0823:EOCOMW>2.0.CO;2)

Dates

Type	When
Created	16 years, 5 months ago (March 9, 2009, 5:03 p.m.)
Deposited	2 months, 1 week ago (June 25, 2025, 5:28 p.m.)
Indexed	2 months, 1 week ago (June 25, 2025, 6:10 p.m.)
Issued	35 years, 8 months ago (Jan. 1, 1990)
Published	35 years, 8 months ago (Jan. 1, 1990)
Published Print	35 years, 8 months ago (Jan. 1, 1990)

Funders 0

None

BibTeX

@inbook{Baumgardner_1990, title={Optical and Electronic Limitations of the Forward-Scattering Spectrometer Probe}, ISBN={9780803151413}, url={http://dx.doi.org/10.1520/stp25416s}, DOI={10.1520/stp25416s}, booktitle={Liquid Particle Size Measurement Techniques: 2nd Volume}, publisher={ASTM International100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959}, author={Baumgardner, D and Cooper, WA and Dye, JE}, year={1990}, month=jan, pages={115–127} }

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