Results 131 to 140 of about 948 (163)
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Coherent Heterodyne Scatterometer
SPIE Proceedings, 1988An instrument has been developed that measures the magnitude of the Bidirectional Scattering Distribution Function (BSDF) employing coherent optical heterodyne detection at 633nm in a Mach-Zehnder interferometer configuration. In preliminary measurements, instrument performance agrees with theoretical predictions and is characterized by diffraction ...
L.Z. Gacusan +3 more
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Acta Astronautica, 1998
Abstract Satellite scatterometers are microwave radars capable of measuring near-surface vector winds (both speed and direction) over the oceans under all weather conditions. The data generated from these instruments are used in scientific studies of upper ocean circulation, tropospheric dynamics, air–sea interaction and climate change; in ...
J Graf +6 more
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Abstract Satellite scatterometers are microwave radars capable of measuring near-surface vector winds (both speed and direction) over the oceans under all weather conditions. The data generated from these instruments are used in scientific studies of upper ocean circulation, tropospheric dynamics, air–sea interaction and climate change; in ...
J Graf +6 more
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The DUT airborne scatterometer
International Journal of Remote Sensing, 1987Abstract An airborne scatterometer system operating at six frequencies simultaneously between 1 and 18 GHz has been developed for the measurement of the microwave scattering of vegetation, forests, sea and other targets. After a description of the instrument, some C- and L-band results are presented.
PAUL SNOEIJ, PETER J. F. SWART
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A Polarimetric Microwave Scatterometer
International Geoscience and Remote Sensing Symposium, 'Remote Sensing: Moving Toward the 21st Century'., 2005A polarimetric r adar has been developed that operates at 1.8, 5, 10, and 35 GHz, and measures the amplitude and phase at four linear transmit-receive polarizations -- the elements of the target s cattering matrix. laboratory and the field, the capable HP8510B network analyzer and HP8341B synthesized frequency source serve as the h eart of this system.
R.G. Onstott, S.H. Gaboury
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SPIE Proceedings, 1989
The design, analysis, and performance of a small-angle scatterometer are presented. A dye-cell Gaussian apodized aperture is utilized to reduce the small-angle diffraction background. After the diffraction background is sufficiently reduced, the system scatter becomes the dominant noise in the instrument beam profile.
Steven J. Wein, William L. Wolfe
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The design, analysis, and performance of a small-angle scatterometer are presented. A dye-cell Gaussian apodized aperture is utilized to reduce the small-angle diffraction background. After the diffraction background is sufficiently reduced, the system scatter becomes the dominant noise in the instrument beam profile.
Steven J. Wein, William L. Wolfe
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Verification of scatterometer design
SPIE Proceedings, 2011Scatterometric applications demand strategies for the selection from the various basic scatterometer principles as well as detailed design rules to fit the final optical instrument, the data processing and user interface into the requirements of the application in scope.
Wenjing Zhao +2 more
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AVNA-based polarimetric scatterometers
IEEE Antennas and Propagation Magazine, 1990The polarization synthesis technique for measuring the scattering properties of point and distributed targets is discussed, and it is pointed out that accurate measurements of both the magnitude and phase of the scattered signal are now possible by using the signal-processing and error-correction techniques of the automatic vector network analyzer ...
F.T. Ulaby, M.W. Whitt, K. Sarabandi
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Progress in Scatterometer Application
Journal of Oceanography, 2002Progress in the scientific application of space-based scatterometer data over the past two decades is reviewed. There has been continuous improvement in coverage, resolution, and accuracy. Besides the traditional applications in weather and ocean-atmosphere interaction, which are based on ocean surface wind vectors, emerging applications over land and ...
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Calibration of RapidScat scatterometer
2017 IEEE Microwaves, Radar and Remote Sensing Symposium (MRRS), 2017RapidScat is a Ku-band scatterometer that flew onboard the International Space Station (ISS) between September 2014 and November 2016. RapidScat's primary objective had been global wind vector retrieval over sea surface from the measured normalized radar cross section (σ°).
Ruaa Alsabah, Ali Al-Sabbagh, Josko Zec
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The SeaWinds scatterometer instrument
Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium, 2002The SeaWinds scatterometer instrument is currently being developed by NASA/JPL, as a part of the NASA EOS Program, for flight on the Japanese ADEOS II mission in 1999. This Ku-band radar scatterometer will infer surface wind speed and direction by measuring the radar normalized backscatter cross-section over several different azimuth angles. This paper
C. Wu +7 more
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