Results 1 to 10 of about 6,982 (149)
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 +5 more sources
Normalized Radar Cross Section of the Sea for Backscatter: 1. Mean Levels [PDF]
Journal of Geophysical Research: Oceans, 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 Plant +2 more
exaly +2 more sources
Importance of the Sea Surface Curvature to Interpret the Normalized Radar Cross Section [PDF]
Journal of Geophysical Research: Oceans, 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 +4 more sources
A Semiempirical Model of the Normalized Radar Cross Section of the Sea Surface, 2. Radar Modulation Transfer Function [PDF]
Journal of Geophysical Research: Oceans, 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. In particular, even if they may provide consistent results for vertical transmit and receive (VV) polarization, they fail
Bertrand Chapron +2 more
exaly +3 more sources
A Semiempirical Model of the Normalized Radar Cross-Section of the Sea Surface 1. Background Model [PDF]
Journal of Geophysical Research: Oceans, 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.
Bertrand Chapron +2 more
exaly +3 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 ...
D V Arnold, D G Long
exaly +2 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).
Maurizio Migliaccio, Ferdinando Nunziata
exaly +3 more sources
Reproducibility-Based Field Validation of Complementary Subsurface Sensing Using a Quantum Diamond Magnetometer and Multi-Frequency Ground-Penetrating Radar [PDF]
SensorsUnderground infrastructure inspection requires sensing methods capable of characterizing both ferromagnetic and non-ferromagnetic subsurface features. This study evaluated a portable nitrogen-vacancy (NV) quantum diamond magnetometer (QDM) together with ...
Chang-Geun Oh +2 more
doaj +2 more sources
Remote Sensing, 2022 In this study, sea surface wind speed was retrieved using the Global Precipitation Measurement (GPM) dual-frequency precipitation radar (DPR) Ka-band data. In order to establish the Ka-band model at low incidence angles, the dependence of the DPR Ka-band
Chong Jiang +4 more
doaj +1 more source