Results 11 to 20 of about 6,503 (283)
Analysis of Data-Derived SeaWinds Normalized Radar Cross-Section Noise
Remote Sensing, 2022 The normalized standard deviation (Kp) of the noise that affects scatterometer Normalized Radar Cross-Sections (σ0s) plays a key role in the ocean and more in particular coastal wind retrieval procedures and the a posteriori quality control.
Giuseppe Grieco +4 more
doaj +6 more sources
On reconciling ground-based with spaceborne normalized radar cross section measurements [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2002 This study examines differences in the normalized radar cross section, derived from ground-based versus spaceborne radar data. A simple homogeneous half-space model, indicates that agreement between the two improves as 1) the distance from the scatterer is increased; and/or 2) the extinction coefficient increases.
K C Ježek, S Gogineni
exaly +6 more sources
Importance of the sea surface curvature to interpret the normalized radar cross section [PDF]
Journal of Geophysical Research, 2007 Asymptotic models (small perturbation and small slope approximation at first‐order, Kirchhoff approximation or two‐scale model) used to predict the normalized radar cross section of the sea surface generally fail to reproduce in detail backscatter radar measurements. In particular, the predicted polarization ratio versus incidence and azimuth angles is
Bertrand Chapron +2 more
exaly +5 more sources
Reconstruction of the Normalized Radar Cross Section Field From GNSS-R Delay-Doppler Map
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014 An effective approach to reconstruct the normalized radar cross section (NRCS) image from Global Navigation Satellite System-Reflectometry (GNSS-R) Delay-Doppler Map (DDM) is proposed. It is physically based on the truncated singular value decomposition (TSVD), properly extended to the 2-D case (2-D TSVD).
Ferdinando Nunziata +1 more
exaly +6 more sources
Dependence of the normalized radar cross section of water waves on Bragg wavelength-wind speed sensitivity [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 1996 Measurements of the normalized radar cross section (/spl sigma//spl deg/) made by the YSCAT ultrawideband scatterometer during an extended deployment on the Canada Centre for Inland Waters (CCIW) Research Tower located at Lake Ontario are analyzed and compared with anemometer wind measurements to study the sensitivity of /spl sigma//spl deg/ to the ...
David G Long, D V Arnold
exaly +5 more sources
Impact of emulsification of crude oil on normalized radar cross section [PDF]
Journal of Oceanology and Limnology, 2019 The emulsification of crude oil is caused by the oil flowing into the water, resulting in the increase of oil film tension, viscosity, water content, and volume, which brings great harm to the marine ecological environment and difficulties for the cleanup of marine emergency equipment.
Jie Guo +3 more
openaire +2 more sources
Calibration of the Normalized Radar Cross Section for Sentinel-1 Wave Mode [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2019 Sentinel-1 (S-1) is a two-satellite constellation for continuity of operational synthetic aperture radar (SAR) observations. Wave mode (WV) is the default mode over open ocean for S-1 to monitor global ocean waves and wind field. Therefore, proper radiometric calibration is essential to accurately infer these geophysical quantities. Based on the global
Huimin Li 0002 +3 more
openaire +4 more sources
Normalized radar cross section of the sea for backscatter: 1. Mean levels [PDF]
Journal of Geophysical Research, 2010 The normalized radar cross section of the sea for backscatter, σo, is investigated for incidence angles between 0° and 89° using data collected over more than two decades. The most recent measurements were made from several ships using a coherent, dual‐polarized, X band radar.
William J Plant, William C Keller
exaly +2 more sources
A semiempirical model of the normalized radar cross-section of the sea surface 1. Background model [PDF]
Journal of Geophysical Research, 2003 Multiscale composite models based on the Bragg theory are widely used to study the normalized radar cross‐section (NRCS) over the sea surface. However, these models are not able to correctly reproduce the NRCS in all configurations and wind wave conditions.
Vladimir Kudryavtsev +2 more
exaly +3 more sources
Normalized radar backscattering cross-section and Doppler shifts of the sea surface in Ka-band [PDF]
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017 Field data taken from the Black Sea Research platform during 2009–2015 are used to develop a dual-co-polarized (VV and HH) empirical model for the sea surface normalized radar cross-section (NRCS) and Doppler Velocity (DV) in the Ka-band. A fitting function for the NRCS is the standard truncated Fourier series in azimuth with polynomial coefficients ...
Yurovsky, Yu. Yu. +3 more
openaire +3 more sources