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Saturday, July 25, 2020 | History

3 edition of Investigation of radar backscattering from second-year sea ice found in the catalog.

Investigation of radar backscattering from second-year sea ice

Investigation of radar backscattering from second-year sea ice

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Published by Remote Sensing Laboratory, University of Kansas Center for Research, Inc. in Lawrence, Kan .
Written in English

    Subjects:
  • Backscattering.,
  • Radar.

  • Edition Notes

    StatementGuang-tsai Lei, Richard K. Moore, and S.P. Gogineni.
    SeriesNASA-CR -- 180986., NASA contractor report -- NASA CR-180986.
    ContributionsMoore, R. K., Gogineni, S. P., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15294989M

    Radar backscattering changes in Arctic sea ice from late summer to early autumn observed by space-borne X-band HH-polarization SAR Jeong Won Park, Hyun Cheol Kim, Sang Hoon Hong, Sung Ho Kang, Hans C Graber, Byongjun Hwang, Craig M. Lee. PROCEEDINGS VOLUME Remote Sensing of the Ocean, Sea Ice, and Large Water Regions

    HIGH-RESOLUTION RADAR BACKSCATTER FROM SEA ICE AND RANGE-GATED STEP-FREQUENCY RADAR USING THE FM-CW CONCEPT by Pannirselvam Kanagaratnam B.S.E.E., University of Kansas, Submitted to the Department of Electrical Engineering and Computer Science and the Faculty of the Graduate School of The University of Kansas in partial fulfillment of the. Evolution of Sea Ice Research Using Scatterometers. The first scattering measurement from sea ice was made in , at Thule, Greenland, by the Naval Research Laboratory using a and GHz radar [Onstott, ]. Radar imaging of sea ice was first attempted by the US Army Cold Regions Research and Engineering Laboratory.

      The ice shelf is thin enough, and the bottom echo strong enough, that we see multiples due to the radar energy bouncing between the ice's interfaces, as well as back off the plane. Beam Pattern. Radar data can be more difficult to interpret than laser data because the beam pattern is not anywhere near as focused. I. Polarimetric scattering and SAR imagery. EM wave propagation and scattering in polarimetric SAR interferometry / S. R. Cloude. Terrain topographic inversion from single-pass polarimetric SAR image data by using polarimetric stokes parameters and morphological algorithm / Y. Q. Jin, L. Luo. Road detection in forested area using polarimetric SAR / G. W. Dong.


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Investigation of radar backscattering from second-year sea ice Download PDF EPUB FB2

Get this from a library. Investigation of radar backscattering from second-year sea ice. [Guang-tsai Lei; R K Moore; S P Gogineni; United States. National Aeronautics and Space Administration.]. To examine the sensitivity of the radar backscattering to the salinity profile variations, the backscattering from sea ice with a few simulated C-shaped salinity profiles are calculated based on a numerical scattering model.

It is found that the radar backscattering is not sensitive to the salinity of sea ice at both C and L : Xu Xu, Camilla Brekke, Anthonin P.

Doulgeris, Frank Melands. The scattering properties of second-year ice were studied in an experiment at Mould Bay in April Radar backscattering measurements were made at frequencies of,and GHz for vertical polarization, horizontal polarization and cross polarizations, with incidence angles ranging from 15 to.

INVESTIGATION OF RADAR BACKSCATTERING FROM SECOND-YEAR SEA ICE Guang-tsai Lei, Richard K. Moore and S. Gogineni Radar Systems and Remote Sensing Laboratory University of Kansas Center for Research, Inc.

Irving Hill Road Lawrence, Kansas RSL Technical Report February Supported by: Office of Naval Research. Download Citation | Comparison of radar backscatter from antarctic and arctic Investigation of radar backscattering from second-year sea ice book ice | We made backscatter measurements at C band ( GHz) over sea ice in the Weddell Sea.

Abstract: This paper is focused on investigations of polarimetric C-band radar signatures of icebergs in sea-ice-covered ocean regions. The main objective is to assess the potential improvement of iceberg detection when using radar polarimetry. The dominant backscattering mechanisms of icebergs are deduced by evaluating different polarimetric parameters.

A model is described for the radar backscatter from first-year and multiyear sea ice, based on simple scattering layers. The physical-optics model using an exponential correlation function is shown able to predict the signatures of first-year ice. Imaging radar picture is similar to a photograph taken by a camera, but the image is of radar waves, not visible light.

Sea ice typically reflects more of the radar energy transmitted by the sensor than the surrounding ocean waters, which makes it easy to distinguish between the two. Radar remote sensing of the sea surface for the extraction of ocean surface wave fields requires separating wave and non-wave contributions to the sea surface measurement.

Conventional methods of extracting wave information from radar measurements of the sea surface rely on filtering the wavenumber-frequency spectrum using the linear dispersion.

Experimental study of wave damping due to ice floes in application to radar remote sensing of the marginal ice zone Paper Author(s): Stanislav A. Ermakov, Tatiana Lazareva, Irina Sergievskaya, Institute of Applied Physics (Russian Federation). Maria Lundhaug, ERS SAR studies of sea ice signatures in the Pechora Sea and Kara Sea region, Canadian Journal of Remote Sensing, /m, 28, 2, (), ().

Crossref David A Clausi, An analysis of co-occurrence texture statistics as a function of grey level quantization, Canadian Journal of Remote Sensing, /m, Books. An illustration of two cells of a film strip.

Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk. Software. An illustration of two photographs. Images. An illustration of a heart shape Donate. An illustration of text ellipses.

More. An icon used to represent a menu that can be toggled by interacting. Get this from a library. A laboratory investigation into microwave backscattering from sea ice. [Jonathan W Bredow; United States.

National Aeronautics and Space Administration.]. A review of the main approaches developed for sea ice classification using satellite imagery is presented. Satellite data are the main and very often only information source for sea ice classification and charting in the remote arctic regions.

The main techniques used for ice classification and ice charting in several national ice services are considered. The backscattering properties of several sea ice types were examined at the two frequencies, using HH, VV, HV, and VH polarization modes.

An incidence angle of 23O off nadir was used in order to. Their signatures are not related to the azimuthal angle but to the incidence angle of the observation and the radar backscattering varies considerably with the incidence angle. Over polar oceans, values of sigma 0 measurements (backscatter coefficients) depend on the dielectric properties of the observed materials: sea water, first-year ice and.

The maximum radar backscattering intensity occurs at a reflectivity factor of 45 dBZ (with rain rate of 24 mm/h). It was found that the spaceborne radar backscattering intensity strongly correlates with the average distance between the stalks on the water surface in the rain field in a nonlinear manner.

The ability of radar to discriminate sea ice types and their thickness was studied. Radar backscatter measurements at MHz (multi-polarization) and GHz (VV Polarization) were analyzed in detail.

The scatterometer data were separated into seven categories of sea ice according to age and thickness as interpreted from stereo aerial photographs.

Spaceborne SAR provides key information on the nature, distribution and evolution of sea ice, to assist operational applications in polar waters. Concurrent in situ dat are not generally available in such cases.

Here, we discuss the development of a radar backscatter model which can assist the interpretation of SAR data under such circumstances. Radar backscattering from sea ice and snow Backscatter Modeling Backscatter measurements Backscatter database Operational analysis of remote sensing data Sea ice parameter retrieval from remote sensing observations Ice concentration Ice types Thickness of thin ice type Ice surface.

This sensor measures the freeboard of sea ice (i.e. its height relative to sea level), and freeboard is then converted to ice thickness by assuming that a floating ice floe is in isostatic balance.

At present there are two kinds of altimeters available for this type of ice thickness estimation: radar and Laser profiler.Skip to Main Content.It has long been known that nonspherical atmospheric ice particles can increase or enhance radar backscattering and attenuation above that expected from spheres of the same mass, even when the particles are small compared with the radar wavelength (e.g., Atlas et al.

).This is particularly true when nonspherical ice particles are oriented such that their largest dimension is perpendicular.