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Friday, May 15, 2020 | History

4 edition of Calibration of the forward-scattering spectrometer probe found in the catalog.

Calibration of the forward-scattering spectrometer probe

Calibration of the forward-scattering spectrometer probe

modeling scattering from a multimode laser beam

  • 172 Want to read
  • 24 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Calibrating,
  • Spectrometers,
  • Laser beams,
  • Forward scattering,
  • Drop size,
  • Mie scattering

  • Edition Notes

    Other titlesCalibration of the forward scattering spectrometer probe., Modeling scattering from a multimode laser beam.
    StatementEdward A. Hovenac, James A. Lock.
    Series[NASA contractor report] -- NASA-CR-204821., NASA contractor report -- NASA CR-204821.
    ContributionsLock, James A., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17822434M
    OCLC/WorldCa39026802

    the forward scattering spectrom eter probe and the active scattering aerosol spectrometer. – Preprints International Cloud Phys. Conf., Bou lder, Co, July , – After that, light not scattered from the beam strikes a dump spot on the collecting optics and is not seen by the detection circuitry. The optical components then focus scattered light at angles of about degrees from the original beam onto a photodiode where .

    The FSSP is a wing-mounted probe in a standard PMS canister. Particle detection and sizing is based on laser light scattering and occurs in free stream. There is no air sample inlet. The instrument resembles a standard FSSP, but with some significant differences. The FSSP has been optimized for the detection of aerosol particles having diameters from to 20 micrometers, and the . THE FORWARD-SCATTERING SPECTROMETER PROBE The forward-scattering spectrometer probe (FSSP) (Knollenberg, ) was used for the in situ measurement of airborne particles in this study. In the FSSP a volume of air is illuminated by a laser beam (Figure 1). The light scattered by the particles in the forward direction is focused by a lens.

    evidence that the forward scattering spectrometer probe (FSSP) may, in spite of its limitations, render reasonable estimates of ice particle concentration under glaciated conditions (e.g., Ivanova et al. ). This topic remains controversial due to the phenomena of larger ice crystals shattering at the FSSP inlet.   A conventional calibration lamp provides the necessary illumination of the spectrometer and measures its positions. This includes things like pixel indices. The calibration process of a conventional calibration lamp provides a set of lines that are evenly distributed for the range you would like to calibrate.


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Calibration of the forward-scattering spectrometer probe Download PDF EPUB FB2

Using one-diameter glass beads, then the new formalism is necessary to extrapolate the calibration over the entire range. Introduction The forward-scattering spectrometer probe (FSSP) is an optical droplet sizing instrument frequently used to measure the diameter of cloud droplets (Dye and Baumgardner ).

The FSSP model is manu. Scattering calculations using a more detailed model of the multimode laser beam in the forward-scattering spectrometer probe (FSSP) were carried out by using a recently developed extension to Mie scattering theory.

From this model, new calibration curves for the FSSP were by: The Particle Measuring Systems (PMS) Forward Scattering Spectrometer Probe (FSSP‐) which was flown on the ER–2 during the Airborne Antarctic Ozone Experiment for Cited by: Calibration of the Forward-scattering Spectrometer Probe: Modeling Scattering from a Multimode Laser Beam Created Date: 11/26/ AM.

Scattering calculations using a detailed model of the multimode laser beam in the forward-scattering spectrometer probe (FSSP) were carried out using a recently developed extension to Mie scattering Calibration of the forward-scattering spectrometer probe book.

From this model, new calibration curves for the FSSP were calculated. Abstract The Particle Measuring Systems (PMS) Forwared Scattering Spectrometer Probe (FSSP) which was flown on the ER-2 during the Airborne Antarctic Ozone Experiment for the measurement of particles in polar stratospheric clouds has been evaluated and calibrated.

Calibration of the Forward-scattering Spectrometer Probe: Modeling Scattering from a Multimode Laser Beam. By James A. Lock and Edward A. Hovenac. Abstract. Scattering calculations using a more detailed model of the multimode laser beam in the forward-scattering spectrometer probe (FSSP) were carried out by using a recently developed extension Author: James A.

Lock and Edward A. Hovenac. The Effect of Calibration of the Forward-Scattering Spectrometer Probe on the Sizing of Cloud DropletsCited by: 5. Calibration of the forward-scattering spectrometer probe - Modeling scattering from a multimode laser beam. By James A. Lock and Edward A. Hovenac. Abstract.

Scattering calculations using a detailed model of the multimode laser beam in the forward-scattering spectrometer probe (FSSP) were carried out using a recently developed extension to Mie Author: James A. Lock and Edward A. Hovenac. Scattering calculations using a more detailed model of the multimode laser beam in the forward-scattering spectrometer probe (FSSP) were carried out by using a recently developed extension to Mie scattering theory.

From this model, new calibration curves for the FSSP were calculated. The difference between the old calibration curves and the new ones is small for droplet diameters less than 10 Cited by: Calibration of the Forward-scattering Spectrometer Probe: Modeling Scattering from a Multimode Laser Beam by Hovenac, Edward A.; Lock, James A.

The Fast Forward Scattering Spectrometer Probe (FFSSP) measures particle size and concentration. The FFSSP sizes particles by measuring the amount of light scattered into the collecting optics aperture during particle interaction through a focused laser beam.

The instrument can size particles from m with a resolution of about 3 m. Advancements in techniques for the operational calibration and characterization of instrument performance of the Particle Measuring Systems, Inc.

(PMS), forward scattering spectrometer probe. Calibration of the forward-scattering spectrometer probe: modeling scattering from a multimode laser beam Author: Edward A Hovenac ; James A Lock ; United States.

Spectrophotometer calibration is a process in which a scientific instrument known as a spectrophotometer is calibrated to confirm that it is working properly. This is important, as it ensures that the measurements obtained with the instrument are accurate.

The procedure varies slightly for different instruments, with most manufacturers providing a detailed calibration guide in the owner's. ent models of the Forward Scattering Spectrometer both instruments.

This was the range most often-oce (FSS) manufactured by Particle Measuring u~ed for the data analysis. Note that the FSSP47 Systems, Inc.

of Boulder, Colorado. appears to oversize smaller water droplets by about The subject of this paper is the performance of one bin or 3 pm. Simulation of the Optical Particle Counter Forward Scattering Spectrometer Probe (FSSP) Consequences for Size Distribution Measurements Ruprecht Jaenicke* and Thomas Hanusch Institut fur Physik der Atmosphare, UniuersiQ of Mainz, Mainz, Germany The physical properties of an optical aerosol particle.

An improved forward scattering spectrometer probe, the FSSP‐, was developed for the Airborne Arctic Stratospheric Expedition. The measures particles in the size range μm to 20 μm and has a greater sensitivity and faster time response than its predecessor, the FSSP‐ by: A cloud droplet probe based on forward scattering was developed.

In this probe, a single-mode nm laser diode with single-mode fiber coupling was used as the transmitter, uniform illumination was obtained by combination of the optical 4F system and a pinhole behind the by: 2.

Calibration of spectrophotometer 1. UV-Visible Spectrophotometry Calibration of Spectrophotometer 2. Essentials Regulations for quality control such as ISOGood Laboratory Practice (GLP), Good Manufacturing Practice (GMP) or standard operating procedures in the pharmaceutical industry as required by the most important pharmacopeia's (EP, DAB, USP), require a.

Forward scattering probes focus on measuring small hydrometeors of D Spectrometer Probe, Cloud Droplet Probe (CDP), and the Cloud and Aerosol Spectrometer. These have been used in most of the field experiments in Table 1.Two Forward Scattering Spectrometer Probes were used to measure droplet distributions in the NASA Lewis Research Center's Icing Research Tunnel.

The instruments showed good agreement when the median volume diameter (MVD) was approximately 16 pm. Coincidence events affected much of the data and caused the measured MVD to be about 2 to 3 pm.Forward scattering spectrometer probe (FSSP) is one of the most important instruments in the weather modification activities.

A prototype of a FSSP for routine observation of cloud droplet was presented in this paper. In this system, a single-mode nm diode laser with single-mode fiber output coupling was used as a transmitter, a square pinhole combining with a 4f optical system were used Author: Ling Bing Bu, Li Tian, Ya Zong Zhu, Xing You Huang.