Results 31 to 40 of about 27,633 (255)
Radar Backscatter and Crop Residues
Canadian Journal of Remote Sensing, 1996 RESUMEIl est difficile d'isoler les effets produits par les residus de culture sur la retrodiffusion radar en raison de la confusion avec les effets dus au travail du sol. Cette etude avait pour objet de quantifier les effets produits par les residus de culture sur la retrodiffusion radar independamment du travail du sol.
A.M. Smith, D.J. Major
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Observation and characterization of radar backscatter over Greenland [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2005 Characterization of the microwave signature of the Greenland snow surface enables delineation of the different snow facies and is a tool for tracking the effects of climate change. A new empirical observation model is introduced that uses a limited number of parameters to characterize the snow surface based on the dependence of radar backscatter on ...
Ivan S. Ashcraft, David G. Long
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Controls on ERS altimeter measurements over ice sheets: Footprint-scale topography, backscatter fluctuations, and the dependence of microwave penetration depth on satellite orientation [PDF]
, 2004 We consider the reliability of radar altimeter measurements of ice sheet elevation and snowpack properties in the presence of surface undulations. We demonstrate that over ice sheets the common practice of averaging echoes by aligning the first return ...
Arthern, RJ, Ridout, AL, Wingham, DJ
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Assessment of multi-temporal, multi-sensor radar and ancillary spatial data for grasslands monitoring in Ireland using machine learning approaches [PDF]
, 2014 Accurate inventories of grasslands are important for studies of carbon dynamics, biodiversity conservation and agricultural management. For regions with persistent cloud cover the use of multi-temporal synthetic aperture radar (SAR) data provides an ...
Barrett, Brian +3 more
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Cavitating Langmuir Turbulence in the Terrestrial Aurora [PDF]
, 2012 Langmuir cavitons have been artificially produced in the earth's ionosphere, but evidence of naturally-occurring cavitation has been elusive. By measuring and modeling the spectra of electrostatic plasma modes, we show that natural cavitating, or strong,
B. Isham +6 more
core +4 more sources
C-Band SAR Imagery for Snow-Cover Monitoring at Treeline, Churchill, Manitoba, Canada
Remote Sensing, 2012 RADARSAT and ERS-2 data collected at multiple incidence angles are used to characterize the seasonal variations in the backscatter of snow-covered landscapes in the northern Hudson Bay Lowlands during the winters of 1997/98 and 1998/99.
Frédérique C. Pivot
doaj +1 more source
HF radar backscatter inversion technique [PDF]
Radio Science, 2006 Methods of inverting high‐frequency radar land and sea backscatter to obtain ionospheric vertical profiles offer an important means of remote sensing the ionosphere up to thousands of kilometers from the transmitter/receiver location. This new inversion technique requires the received elevation angle as well as the time delay or group path of the ...
Norman, Robert., Dyson, Peter.
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Advanced Materials Technologies, EarlyView.Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu +8 more
wiley +1 more source
Flood occurrence mapping of the middle Mahakam lowland area using satellite radar [PDF]
Hydrology and Earth System Sciences, 2012 Floodplain lakes and peatlands in the middle Mahakam lowland area are considered as ecologically important wetland in East Kalimantan, Indonesia. However, due to a lack of data, the hydrological functioning of the region is still poorly understood ...
H. Hidayat +3 more
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Investigation of ducts as a “radar pinhole” for detecting objects through a wall [PDF]
, 2016 There is a continuing interest in the through-the-wall capabilities of radar. It has been found that walls behave as a low-pass medium, and therefore through-the-wall radar has been restricted to frequencies in the low GHz range.
Whitelonis, Nicholas John
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