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Saturday, July 25, 2020 | History

2 edition of Atmospheric backscatter model development for COb2s wavelengths found in the catalog.

Atmospheric backscatter model development for COb2s wavelengths

Adarsh Deepak

Atmospheric backscatter model development for COb2s wavelengths

by Adarsh Deepak

  • 196 Want to read
  • 35 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Atmosphere,
  • Aerosols

  • Edition Notes

    StatementAdarsh Deepak, Geoffrey S. Kent, and Glenn K. Yue ; prepared for Marshall Space Flight Center under contract NAS8-34427
    SeriesNASA contractor report -- 3638
    ContributionsKent, Geoffrey S, Yue, Glenn K, George C. Marshall Space Flight Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL14931114M

    Abstract. An airborne CO 2 coherent lidar has been developed and flown on over 30 flights of the NASA DC-8 research aircraft to obtain aerosol and cloud backscatter and extinction data at a wavelength near 9 μm. Designed to operate in either zenith- or nadir-directed modes, the lidar can be used to measure vertical profiles of backscatter throughout the vertical extent of the troposphere and. Atmospheric Environment Pergamon Press Vol. 3, pp. Printed in Great Britain LIDAR MEASUREMENT OF BACKSCATTER AND ATTENUATION OF ATMOSPHERIC AEROSOL (First received 4 October and in final form 20 November ) Abstractertical profiles of the volume backscatter and extinction coefficients of the atmos- pheric aerosol have been derived from lidar Cited by:

    Lidar backscatter cross-sectional measurements at , , and μm were acquired during November and May–June around the Pacific region by the NASA DC-8 aircraft as part of the Global Backscatter Experiment. The primary motivation for the Global Backscatter Experiment was the study of lidar backscatter cross sections for the development of a spaceborne wind-sensing lidar Cited by: 9. Mar 01,  · This paper presents a new one-dimensional wind speed model, as a function of backscatter only, and a two-dimensional model, as a function of backscatter and significant wave height, tuned to AltiKa’s backscatter measurements. The performance of these new Ka-band altimeter wind speed models is assessed thr Cited by:

    Hereby, we present a new backscatter lidar forward operator which allows for a quantitative comparison of atmospheric chemistry models and backscatter lidar measurements. We applied the operator on model predictions of the Eyjafjallajökull eruption where the model Author: Armin Geisinger, Andreas Behrendt, Volker Wulfmeyer, Jens Strohbach, Jochen Förstner, Roland Potthas. Aug 13,  · Using incorrect parameters will give biased concentration estimates and impair discrimination ability. This paper describes an approach for estimating both the spectral dependence of the aerosol backscatter and relative concentration range-dependence of a set of materials using multi-wavelength axendadeportiva.com by: 1.


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Atmospheric backscatter model development for COb2s wavelengths by Adarsh Deepak Download PDF EPUB FB2

Development of a global model for atmospheric backscatter at CO₂ wavelengths Author: G S Kent ; Institute for Atmospheric Optics & Remote Sensing, ; United States. Atmospheric backscatter model development for CO₂ wavelengths Author: Adarsh Deepak ; Geoffrey S Kent ; Glenn K Yue ; George C.

Marshall Space Flight Center. Get this from a library. Development of a global model for atmospheric backscatter at CO₂ wavelengths. [Geoffrey S Kent; Institute for Atmospheric Optics & Remote Sensing,; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch,; George C.

Marshall Space Flight Center.]. The first atmospheric aerosol backscatter measurements at the rare isotope CO2 wavelength of µm were obtained in the troposphere over the Pacific Ocean in May–June While current backscatter lidars employ lasers, the first backscatter predates the invention of the laser and employed searchlights.

Lidar is used to detect and profile certain constituents in the atmosphere, such as molecules, aerosols, and clouds. Here we report on the progress of this development into an instrument called Small Spaceborne Lidar for Atmospheric Backscatter- measurements (S 2 LAB).

This instrument is designed to be part of some sensor package of future operational weather-observation satellites in an km axendadeportiva.com: M. Endemann. The approaching realization of a spaceborne monostatic, single-wavelength backscatter lidar promises to achieve global measurements of some atmospheric states and constituents with an excellent height resolution of about axendadeportiva.com: H.

Quenzel, M. Kästner. May 01,  · Though Mie-type backscatter oscillations are present for all considered aspect ratios, as can be seen from Fig. 1, backscatter cross sections of nonspherical snowflakes already begin to deviate noticeably from the spherical model already at major dimensions of about D = cm for ν = GHz, and D = cm for ν = 94 GHz.

This indicates that, for at least vertical-viewing geometry Cited by: lidar systems (ACLs) provide a 3D dataset of atmospheric backscatter profiles. However, as the aerosol number concentration 5 cannot be obtained from the ACL data alone, a backscatter-lidar forward model is required which allows for a qualitative and quantitative model validation based on.

These are already used for the detection of clouds and aerosols, providing a 3D. 5 dataset of atmospheric backscatter proles. However, as the aerosol number concentration cannot be obtained from the ACL. data alone, one needs a backscatter-lidar forward model to simulate lidar proles from the model variables.

Lidar inversion of atmospheric backscatter and extinction-to-backscatter ratios by use of a Kalman filter information and the accuracy of the atmospheric model used. The study ends with an encouraging turn power in an elastic-backscatter lidar.

Theoret-ical development is described in Sections 2 and 3. Modeling Backscatter Properties of Snowfall at Millimeter Wavelengths as those used by the U.S. Department of Energy’s Atmospheric Radiation Measurement Program (K a and W bands) and the CloudSat mission (W band).

which is often applicable for longer radar wavelengths, the spherical model. Abstract. A backscatter model was developed for measuring wind field with the far-field approximation method.

The theoretical computation and computer simulations with one spatial dimension show that this model can realistically describe the physical meaning and process of the three methods in wind measurements including the spaced antenna (SA) method, Doppler beamswing (DBS) method, and Author: Shu Weiping, Zhao Zhengyu.

Get this from a library. Development of a global model for atmospheric backscatter at CO₂ wavelengths: monthly progress report, June July 13.

Aug 30,  · A measurement procedure is proposed to retrieve the profiles of atmospheric aerosol backscatter coefficients (βa) from the results of multi-wavelength sounding of the atmosphere by a laser location system based on a Nd: YAG-laser.

The procedure uses a regression dependence between spectral values of βa (background aerosol model) and involves the determination of coefficients which Author: M. Kugeiko, S. Lysenko.

Background. OLR has four main routes to space: emitted on the wavelengths of CO 2 emission and absorption by the CO 2 emission layer (CO 2EL), in the atmospheric window from the (near) surface or from the cloud tops, or on the wavelengths of water vapor emission and absorption from the water vapor emissions layer (WVEL).

May 01,  · Modeling Backscatter Properties of Snowfall at Millimeter Wavelengths Next Article Modeling Backscatter Properties of Snowfall at Millimeter Wavelengths radar properties is performed for the common frequencies of millimeter-wavelength radars such as those used by the U.S.

Department of Energy’s Atmospheric Radiation Cited by: Journal of Atmospheric and Terrestrial Physics,Vol. 7, pp. to Pergamon Press Ltd., London A theoretical model for high-frequency backscatter from the sea surface via the ionosphere WILLIAM C.

HOFFMAN* (Received 4 March ) ABSTRACT The sizable backscatter from the ocean for high-frequency radio waves propagated via the ionosphere is accounted for, using an essentially Cited by: 1. As a result, the backscatter-coefficient-weighted center of the M2 Raman spectrum is shifted to shorter wavelengths by approximately nm as compared to the M3 spectrum.

This example suggests that the model of D’Arrigo et al. () is suited for interpreting the Raman spectra of liquid-water clouds, but more studies are necessary to substantiate this axendadeportiva.com by: Significant improvements can be achieved by comprehensive size-resolved microphysical and optical modelling along backward trajectories based on COSMO-7 wind and temperature fields, which allow accurate computation of humidities, homogeneous ice nucleation, resulting ice particle size distributions and backscatter ratios at the COBALD wavelengths.

Backscatter model for the unusual radar properties of the Greenland Ice Sheet colation facies one of the brightest natural terrain of the Earth’s surface at centimet ric wavelengths.Analytic models for the altitude–size distribution of atmospheric aerosols are used of the separable form η (y,r) = ρ (y)n (r), where ρ (y) is a vertical density profile and n (r) is the differential aerosol size distribution.

The functions considered for.Wavelength dependence of backscattering and extinction of kaolin dust at CO general the wavelength dependence of backscatter is less dependent on wavelength for a multiple- atmosphere. As.