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The Dependence Of The Radar Modulation Transfer Function On Environmental Conditions And Wave Parameters A Contribution To Studies Of Radar Backscattering From The Sea Surface Revision
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Book Synopsis The Dependence of the Radar Modulation Transfer Function on Environmental Conditions and Wave Parameters (A Contribution to Studies of Radar Backscattering from the Sea Surface). Revision by : David E. Weissman
Download or read book The Dependence of the Radar Modulation Transfer Function on Environmental Conditions and Wave Parameters (A Contribution to Studies of Radar Backscattering from the Sea Surface). Revision written by David E. Weissman and published by . This book was released on 1983 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report shows how the Modulation Transfer Function, an important quantity for remote microwave sensing of ocean wave spectra, will vary with environmental conditions that control the air-sea interaction. The accuracy with which this quantity is known will determine the quality of remote measurements of ocean wave spectra. Microwave remote sensing of individual ocean wavelengths (and the complete directional spectrum) is based on synchronized reflectivity variations along each wave, that the radar can resolve spatially. This study demonstrates that the MTF, which is the ratio of this reflectivity (amplitude of variation) to the ocean wave amplitude, is affected by the air-sea interaction, in addition to the hydrodynamic interaction between capillary and long gravity waves. Recent measurements by the Naval Research Laboratory of the ocean wave-radar modulation transfer function (MTF) from fixed ocean platforms, over a period of several years, have demonstrated that the local hydrodynamic modulation of short centimeter waves is affected by the air-sea interaction. Results from widely separated ocean regions also show different individual properties, that make detailed measurements necessary.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quarterly Literature Review of the Remote Sensing of Natural Resources by :
Download or read book Quarterly Literature Review of the Remote Sensing of Natural Resources written by and published by . This book was released on 1984 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1984 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis A Study of the Dependence of Radar Backscatter Cross Section on Wind Speed and Wave Slope from the MARSEN Experimental Results (A Contribution to Studies of Radar Backscattering from the Sea Surface). Supplement to Final Report by : D. E. Weissman
Download or read book A Study of the Dependence of Radar Backscatter Cross Section on Wind Speed and Wave Slope from the MARSEN Experimental Results (A Contribution to Studies of Radar Backscattering from the Sea Surface). Supplement to Final Report written by D. E. Weissman and published by . This book was released on 1983 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of the radar cross section data acquired from the NORDSEE tower during the MARSEN Experiment by the Naval Research Laboratory was made. A dependence on both wind speed and sea state was expected, based on observations and results obtained during the Gulf of Mexico Experiment. The range of variation of wind speed and wave slope during MARSEN were substantial. However, within a narrow range of wind speeds the range of variation of wave slopes was insufficient to demonstrate a radar cross section dependence on it. The results contained herein display appreciable randomness at each slope value; this tends to mask a likely dependence of radar cross section on slope. These results do not conflict with those obtained in the Gulf of Mexico, some of which are included for comparison, they are just too limited in range to add independent support.
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1984 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724223807 Total Pages :418 pages Book Rating :4.2/5 (238 download)
Book Synopsis Fundamental Studies of Radar Scattering from Water Surfaces by : National Aeronautics and Space Administration (NASA)
Download or read book Fundamental Studies of Radar Scattering from Water Surfaces written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-24 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: The University of Kansas and the University of Washington conducted a series of experiments during July and August of 1989, and July and August of 1990, to study the effects of various geophysical parameters on radar backscatter. The experiments were conducted from a platform in Lake Washington. Measurements of backscattered power and radar range were made by the University of Kansas, and environmental data such as wind speed, wind direction, and air and water temperature were measured by the University of Washington. Results of preliminary data processing are described. Radar data were acquired using two radars, one that operated at C and X bands and another at Ka band. Measurements were made at W and HH antenna polarizations, at different angles of incidence and under various wind conditions. Plots of backscattered power, normalized radar cross section, and wave height, and the Modulation Transfer Functions of selected data are presented. Salam, A. and Bush, D. and Gogineni, S. and Zaide, A. Unspecified Center NASA-CR-194030, NAS 1.26:194030, RSL-TR-7970-2 NAGW-1278...
Book Synopsis Radar Scattering from Modulated Wind Waves by : G.J. Komen
Download or read book Radar Scattering from Modulated Wind Waves written by G.J. Komen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ten years ago, de Loor and co-workers at TNO, The Netherlands, were the first to report bottom topography patterns in real aperture radar (RAR) images of the southern North Sea. At that time, this was a real puzzle. The skin depth of microwaves for sea water is only of the order of centimeters while the sea bottom is about 20 meters below the surface. Electromagnetic radiation therefore cannot probe the bottom directly. Similar phenomena were found in radar imagery from SEASAT and SIR-AlB synthetic aperture radars (SAR's) of Nantucket Shoals, the English Channel and many other coastal areas. Since then theory and ocean field experiments (Le., Phelps Bank, Georgia Straits, SARSEX, TOWARD, FASINEX, etc.) have advanced our understanding considerably. We now know that these surface signatures are the results of surface currents, perturbed by the bottom topography, which refract the propagation and modulate the energy of (short) surface waves so as to cause microwave backscatter power variations. Hence, any large scale ocean features containing nonuniform surface currents (i.e. internal waves, eddies, fronts, etc.) will cause similar manifestations in the radar imagery by means of current-wave-microwave interactions. Observations confirm this.
Book Synopsis Coastal Ocean Dynamics Applications Radar by : Thomas Martin Georges
Download or read book Coastal Ocean Dynamics Applications Radar written by Thomas Martin Georges and published by . This book was released on 1985 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dependence of Radar Backscatter on the Energetics of the Air-Sea Interface by : Marie C. Colton
Download or read book Dependence of Radar Backscatter on the Energetics of the Air-Sea Interface written by Marie C. Colton and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Normalized Radar Cross-Section (NRCS), the fundamental measurement made by radar scatterometers, was obtained as part of the Water-Air Vertical Exchanges 1987 (WAVES87) experiment. The experiment was designed to evaluate the effects of environmental parameters on the NRCS and was performed from a research tower located in Lake Ontario, on which two microwave scatterometers operating at 14.0 and 5.0GHz were installed for six weeks in the autumn of 1987. The novel aspect of this experiment was that the 14.0GHz radar automatically rotated through 300 deg in azimuth angle at six different incidence angles to the water surface, accompanied by simultaneous measurements of wind stress and high resolution directional wave spectra. Therefore, the incidence and azimuthal angle behavior of the NRCS was examined as a function of wind speed, friction velocity, wind direction, wave direction and atmospheric stability. The dependence of the NRCS on wind speed for various incidence angles is similar to previous results. However, the slope exponents of the NRCS vs. 19.5m wind speed curves at intermediate incidence angles are higher than the corresponding open ocean measurements. Scaling the lake neutral wind speed data by the ratio of lake to ocean drag coefficients reduces the slopes of the curves and suggests the drag coefficient has a sea state dependence. (RH).
Book Synopsis Dependence of Radar Backscatter on the Energetics of the Air-Sea Interface by : Marie C. Colton
Download or read book Dependence of Radar Backscatter on the Energetics of the Air-Sea Interface written by Marie C. Colton and published by . This book was released on 1989 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Normalized Radar Cross-Section (NRCS), the fundamental measurement made by radar scatterometers, was obtained as part of the Water-Air Vertical Exchanges 1987 (WAVES87) experiment. The experiment was designed to evaluate the effects of environmental parameters on the NRCS and was performed from a research tower located in Lake Ontario, on which two microwave scatterometers operating at 14.0 and 5.0GHz were installed for six weeks in the autumn of 1987. The novel aspect of this experiment was that the 14.0GHz radar automatically rotated through 300 deg in azimuth angle at six different incidence angles to the water surface, accompanied by simultaneous measurements of wind stress and high resolution directional wave spectra. Therefore, the incidence and azimuthal angle behavior of the NRCS was examined as a function of wind speed, friction velocity, wind direction, wave direction and atmospheric stability. The dependence of the NRCS on wind speed for various incidence angles is similar to previous results. However, the slope exponents of the NRCS vs. 19.5m wind speed curves at intermediate incidence angles are higher than the corresponding open ocean measurements. Scaling the lake neutral wind speed data by the ratio of lake to ocean drag coefficients reduces the slopes of the curves and suggests the drag coefficient has a sea state dependence. (RH).
Book Synopsis On the Relative Importance of the Ocean Wave-radar Modulation Transfer Function for Inverting ERS-1 SAR Image Spectra Into Ocean Wave Spectra by : C. Bruning
Download or read book On the Relative Importance of the Ocean Wave-radar Modulation Transfer Function for Inverting ERS-1 SAR Image Spectra Into Ocean Wave Spectra written by C. Bruning and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Clutter written by Keith D. Ward and published by IET. This book was released on 2006-06-21 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea Clutter: Scattering, the K Distribution and Radar Performance examines the statistics of radar scattering from the sea surface in terms of their relevance to radar operating in a maritime environment; including remote sensing, surveillance and targeting applications. A lot of the work in the book is based on the compound Kdistribution model for the amplitude statistics of sea clutter. In addition, the book addresses the specification of performance required by customers and the measurement of performance of systems supplied to customers.
Download or read book Earth Resources written by and published by . This book was released on 1987 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Theoretical Study of Radar Return and Radiometric Emission from the Sea by : William H. Peake
Download or read book A Theoretical Study of Radar Return and Radiometric Emission from the Sea written by William H. Peake and published by . This book was released on 1972 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modulation of the Radar Backscatter from the Ocean Surface by a Long Gravity Wave by : J. C. Holtzman
Download or read book Modulation of the Radar Backscatter from the Ocean Surface by a Long Gravity Wave written by J. C. Holtzman and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
