Results 201 to 210 of about 27,633 (255)

On the effects of vegetation on radar backscattering

2016 2nd International Conference on Advanced Technologies for Signal and Image Processing (ATSIP), 2016
Studying the hydrological cycle has always aroused great interest that the stakes are as significant as varied. The understanding of the phenomena of droughts and floods has become essential in the selection and distribution of agricultural crops. In addition, the water and energy fluxes at the soil / atmosphere interface are strongly dependent on soil
Ibtissem Hosni, Lilia Bennaceur Farah, Saber Mohamed Naceur, Imed Riadh Farah   +3 more
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Multichannel radar backscatter communication and localization

2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014
This paper concerns the use of wideband RF backscatter from semi-passive RF tags for energy-efficient wireless telemetry. Using LFM (Linear Frequency Modulated) signals from a radar base station, we present a method for joint ranging and communications with a distributed set of sensor nodes. Backscatter signaling from each node results in modulation on
Itay Cnaan-On, Stewart J. Thomas, Matthew S. Reynolds, Jeffrey L. Krolik   +3 more
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Experiments on the Radar Backscatter of Snow

IEEE Transactions on Geoscience Electronics, 1977
The 1-8-GHz microwave active spectrometer (MAS) system was used to measure the backscatter response from ground covered with a relatively thin layer of snow (up to 15 cm) in the 1975 winter. Except for one dry snow data set, the results of this experiment pertain to wet snow conditions.
Fawwaz T. Ulaby, W. H. Stiles, L. F. Dellwig, B. C. Hanson   +3 more
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Variability in the measurement of radar backscatter

IEEE Transactions on Antennas and Propagation, 1976
A variety of systems and platforms have been used over the past three decades to acquire radar backscatter data of terrain. The variability in the reported data was evaluated for agricultural crops under "similar" phenological conditions and for approximately the same sensor parameters (frequency, polarization, and angle of incidence).
T. Bush, F. Ulaby
openaire   +1 more source

A comparative study of RADAR Ka-band backscatter

SPIE Proceedings, 2014
Ka-band RADAR frequency range has not yet been used for Synthetic Aperture Radar (SAR) from space so far, although this technology may lead to important applications for the next generation of SAR space sensors. Therefore, feasibility studies regarding a Ka-band SAR instrument have been started [1][2], for the next generation of SAR space sensors.
Daniele Mapelli, Nazzareno Pierdicca, Leila Guerriero, Paolo Ferrazzoli, Eduardo Calleja, Björn Rommen, Davide Giudici, Andrea Monti-Guarnieri   +7 more
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Incidence Angle Normalization of Radar Backscatter Data

IEEE Transactions on Geoscience and Remote Sensing, 2013
The National Aeronautics and Space Administration's (NASA) proposed Soil Moisture Active Passive (SMAP) satellite mission ( ~ 2014) will include a radar system that will provide L-band multi-polarization backscatter at a constant incidence angle of 40 °.
Iliana Mladenova, Thomas J. Jackson, Rajat Bindlish, Scott Hensley   +3 more
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Radar Backscatter from the Earth's Ionosphere

IEEE Transactions on Military Electronics, 1964
The role of radar backscatter observations in ionospheric studies is outlined. The theoretical developments are described that form the basis for ground-based measurements of electron density, electron temperature, ion temperature, and ionic composition at ionospheric heights, Observations of the first three parameters have been successful. Observation
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Radar backscatter characteristics of trees at 215 GHz

IEEE Transactions on Geoscience and Remote Sensing, 1988
Millimeter-wave backscatter measurements are presented for various tree types taken during the 1987 growing season at Amherst, Massachusetts. These measurements were taken with a 215-GHz radar system that is capable of measuring backscatter for the VV (vertical transmit, vertical received), HH (horizontal transmit, horizontal received), VH, and HV ...
R.M. Narayanan, C.C. Borell, R.E. McIntosh   +2 more
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Fractal polarization signature of radar backscattering variations

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016
A new type of polarization signatures for radar imaging of the earth's cover is proposed. These signatures allow us to determine the degree of spatial variations of the backscattering coefficient on the basis of the fractal approach. The azimuthal dependence of the radar backscattering spatial variations is discovered when analyzing backscattering from
Aleksey V. Dmitriev, Tumen N. Chimitdorzhiev, Pavel N. Dagurov   +2 more
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Radar backscattering of forest stands

International Journal of Remote Sensing, 1985
Abstract Research on the potential applications of microwave remote sensing in agriculture is conducted in the Netherlands by the ROVE team. Since active microwave remote sensing, featuring its all-weather capability, also seems to be a promising tool for forest classification, especially on a global scale, the Wageningen Agricultural University ...
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