Results 31 to 40 of about 5,564 (299)

Synergy of multi-temporal polarimetric SAR and optical image satellite for mapping of marsh vegetation using object-based random forest algorithm

open access: yesEcological Indicators, 2021
The accurate classification of marsh vegetation is an important prerequisite for wetland management and protection. In this study, the Honghe National Nature Reserve was used as the research area.
Bolin Fu   +8 more
doaj   +1 more source

An Empirical Model for Backscattering Coefficients of Vegetation Fields at 5.4 GHz [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2022
A new, simple empirical model for microwave backscattering from vegetation fields at 5.4 GHz is proposed in this paper. First, a modified radiative transfer model (RTM) is used to generate a database of multi-polarized backscattering coefficients of ...
Yisok Oh   +2 more
doaj   +1 more source

Sensitivity of Particle Extinction and Backscattering Calculation from Mie-Raman Lidar Measurements to the Choice of Ångström Exponent

open access: yesEPJ Web of Conferences, 2016
Vibrational Raman scattering from nitrogen is commonly used in Mie-Raman lidars for evaluation of particle backscattering (β) and extinction (α) coefficients.
Suvorina Anastasia   +3 more
doaj   +1 more source

Backscattering Statistics of Indoor Full-Polarization Scatterometric and Synthetic Aperture Radar Measurements of a Rice Field

open access: yesRemote Sensing, 2023
The backscattering coefficient σ0 of a rice field is closely related to the amplitude, power, and phase of its radar backscattered signals. An investigation of the statistics of indoor full-polarization scatterometric and synthetic aperture radar (SAR ...
Xiangchen Liu   +5 more
doaj   +1 more source

The infuence ofoilspilland enteromorphaon syntheticaperture radar backscatter coefficient [PDF]

open access: yes2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
In this Paper presentation, compare the normal Radar backscatter coefficient between oil spill area, clean sea area, Ship, platform area and Enteromorpha area. The result display the backscatter coefficient of oil spill area is lower than clean sea and the Enteromorpha area, ship, platform area is higher than clean sea.
Guo, Jie, He, Yijun, Zhang, Biao
openaire   +2 more sources

PRELIMINARY RESULTS OF ESTIMATING SOIL MOISTURE OVER BARE SOIL USING FULL-POLARIMETRIC ALOS-2 DATA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Synthetic Aperture Radar (SAR) imaging system is one of the most effective way for Earth observation. The aim of this study is to present the preliminary results about estimating soil moisture using L-band Synthetic Aperture Radar (SAR) data.
A. Sekertekin   +3 more
doaj   +1 more source

Dual-Wavelength Polarimetric Lidar Observations of the Volcanic Ash Cloud Produced during the 2016 Etna Eruption

open access: yesRemote Sensing, 2021
Lidar observations are very useful to analyse dispersed volcanic clouds in the troposphere mainly because of their high range resolution, providing morphological as well as microphysical (size and mass) properties.
Luigi Mereu   +6 more
doaj   +1 more source

Multi-Polarization ASAR Backscattering from Herbaceous Wetlands in Poyang Lake Region, China

open access: yesRemote Sensing, 2014
Wetlands are one of the most important ecosystems on Earth. There is an urgent need to quantify the biophysical parameters (e.g., plant height, aboveground biomass) and map total remaining areas of wetlands in order to evaluate the ecological status of ...
Huiyong Sang   +3 more
doaj   +1 more source

Measurements of wavelength dependent scattering and backscattering coefficients by low-coherence spectroscopy [PDF]

open access: yes, 2011
Quantitative measurements of scattering properties are invaluable for optical techniques in medicine. However, noninvasive, quantitative measurements of scattering properties over a large wavelength range remain challenging.
Bosschaart, N.   +14 more
core   +1 more source

Evolution study of smoke backscattering coefficients in a cell by means of a compact mobile Nd:YAG lidar system

open access: yes, 2007
Detection of smoke from forest fire is one of the practical applications of lidar. As it is well known, smoke contains a large number of small particles of ash or soot, leading to a large backscattering efficiency and consequently favourable conditions ...
MARTELLUCCI, SERGIO   +11 more
core   +1 more source

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