Results 31 to 40 of about 6,503 (283)

Geochemical analysis of SAR backscattering (Sentinel-1) on global ocean oil spill cases

European Journal of Remote Sensing, 2023
The oil spill is one of the most impactful sources of marine pollution on the ocean surface, detected by the SAR sensors as dark areas, regions with low backscatter values. Due to the complex mixture of hydrophobic hydrocarbons, mineral oil spills change
José Milton Neves de Souza Júnior, Luís Felipe Ferreira de Mendonça, Heverton da Silva Costa, Juliana Costi, Rodrigo Nogueira Vasconcelos, André Telles da Cunha Lima, Sidnei João Siqueira Sant’anna, José Marques Lopes, Milton José Porsani, de José Vivas Garica Miranda, Carlos Alessandre Domingos Lentini   +10 more
doaj   +1 more source

94 GHz Radar Backscatter Characteristics of Alpine Glacier Ice

Geophysical Research Letters, 2023
Measuring the radar backscatter characteristics of glacier ice at different frequencies and incidence angles is fundamental to predicting the glacier mapping performance of a sensor. However, such measurements at 94 GHz do not exist.
W. D. Harcourt, D. A. Robertson, D. G. Macfarlane, B. R. Rea, M. Spagnolo   +4 more
doaj   +1 more source

Sea Surfaces Scattering by Multi-Order Small-Slope Approximation: a Monte-Carlo and Analytical Comparison [PDF]

AUT Journal of Electrical Engineering, 2019
L-band electromagnetic scattering from two-dimensional random rough sea surfaces are calculated by first- and second-order Small-Slope Approximation (SSA1, 2) methods.
Nafiseh Radkani, Bijan Zakeri
doaj   +1 more source

Microwave Specular Measurements and Ocean Surface Wave Properties

Sensors, 2021
Microwave reflectometers provide spectrally integrated information of ocean surface waves several times longer than the incident electromagnetic (EM) wavelengths.
Paul A. Hwang, Thomas L. Ainsworth, Jeffrey D. Ouellette   +2 more
doaj   +1 more source

On the joint use of scattering and damping models to predict X-band co-polarized backscattering from a slick-covered sea surface

Frontiers in Marine Science, 2022
In this study, sea surface scattering with and without surfactants is predicted using the two-scale boundary perturbation model (BPM) and the advanced integral equation model (AIEM) augmented with two different damping models, i.e., the Marangoni one and
Tingyu Meng, Tingyu Meng, Ferdinando Nunziata, Andrea Buono, Xiaofeng Yang, Xiaofeng Yang, Maurizio Migliaccio   +6 more
doaj   +1 more source

Physics-Based Forward Modeling of Ocean Surface Swell Effects on SMAP L1-C NRCS Observations

Sensors, 2022
This paper examines the impact of ocean surface swell waves on near-coastal L-band high-resolution synthetic aperture radar (SAR) data collected using the National Aeronautics and Space Administration’s (NASA) Soil Moisture Active/Passive (SMAP) radar at
Shanka N. Wijesundara, Joel T. Johnson
doaj   +1 more source

SIMULATION STUDY ON THE EFFECT OF SAND DIGGING AND HEAPING ON SAR IMAGING IN THE PEARL RIVER ESTUARY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
There are frequent sand digging and heaping activities in shoal in the Pearl River Estuary (PRE). Water depth has changed in patches, which can be imaged by synthetic aperture radar (SAR).
X. Wang, H. Zhang, B. Fu, W. Guan, A. Shi   +4 more
doaj   +1 more source

Study of Intensive Anthropogenic Impacts of Submerged Wastewater Discharges on Marine Water Areas Using Satellite Imagery

Journal of Marine Science and Engineering, 2022
This paper focuses on a detailed analysis of coastal waters under the conditions of the intense anthropogenic impacts of submerged wastewater discharges, using optical and radar satellite images.
Valery Bondur, Viktor Zamshin
doaj   +1 more source

An Assessment of CYGNSS Normalized Bistatic Radar Cross Section Calibration

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
A cyclone global navigation satellite system (CYGNSS) $\sigma _o$ calibration analysis is presented using version 2.0 of the Level 1 dataset available on PO.DAAC. Three separate analyzes are conducted, namely, an examination of the specular bin location (in delay) and $\sigma _o$ relationship, an investigation of the impact of recently improved
Faozi Said, Zorana Jelenak, Paul S. Chang, Seubson Soisuvarn   +3 more
openaire   +1 more source

Quantitative Evaluation of the Effects of Large-Scale Sea Wave Components on Microwave Backscattering From Ocean Surface

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
This article quantitatively examined the effect of these long-wave components with wavelength larger than the Bragg component on radar backscattering using the series-expanded first-order small-slope approximation (SSA-1) and the Hwang sea wave spectrum ...
Dengfeng Xie, Feng Guo
doaj   +1 more source