Results 11 to 20 of about 856,677 (287)

Hyperspectral Estimation of Layer-Specific Leaf Nitrogen Content in Potato Canopy by Integrating Fractional-Order Derivatives and Three-Band Spectral Indices [PDF]

open access: yesPlants
To address the insufficient characterization of vertical heterogeneity in potato canopy leaf nitrogen content (LNC), this study developed a layer-specific LNC estimation framework based on canopy hyperspectral reflectance, fractional-order derivative ...
Ming Jin   +9 more
doaj   +2 more sources

Coral Bleaching Detection in the Hawaiian Islands Using Spatio-Temporal Standardized Bottom Reflectance and Planet Dove Satellites

open access: yesRemote Sensing, 2020
We present a new method for the detection of coral bleaching using satellite time-series data. While the detection of coral bleaching from satellite imagery is difficult due to the low signal-to-noise ratio of benthic reflectance, we overcame this ...
Yaping Xu   +7 more
doaj   +2 more sources

Carbon Nanotube (CNT) Honeycomb Cell Area-Dependent Optical Reflectance

open access: yesNanomaterials, 2016
The relationship between the physical structure of carbon nanotube (CNT) honeycomb structures and their total, diffuse, and specular reflectance is investigated for the first time.
Junthorn Udorn   +2 more
doaj   +2 more sources

ASSESSMENT OF BOTTOM-OF-ATMOSPHERE REFLECTANCE IN LIDAR DATA AS REFERENCE FOR HYPERSPECTRAL IMAGERY [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
While airborne lidar has confirmed its leading role in delivering high-resolution 3D topographic information during the last decade, its radiometric potential has not yet been fully exploited.
A. Roncat, N. Pfeifer, C. Briese
doaj   +4 more sources

Bathymetry mapping and sea floor classification using multispectral satellite data and standardized physics-based data processing [PDF]

open access: yes, 2011
Multispectral satellite data (WordView-2, IKONOS, QuickBird) are used to map bathymetry and spectral sea floor classes in a range of coastal areas.
Ohlendorf, S.   +9 more
core   +1 more source

Remote sensing reflectance reconstruction to obtain water optical properties from MERIS multispectral satellite images [PDF]

open access: yes, 2010
We use a multiple regression analysis and a data bank of about 400 reflectance spectra to reconstruct hyperspectral reflectances between 400 and 900 nm with a 5 nm step using only the values known at the wavelengths of the MERIS sensor level 2 data.
Frédéric Jourdin   +7 more
core   +1 more source

Reproducibility of Reflections from the Bottom of the Ocean [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1965
The signals reflected by the bottom of the ocean are complex and dependent upon the location. Seismic-profiling data were taken in typically smooth and rough areas. The similarity of reflection signals as a function of the ship's position was studied for the areas. A portion of the reflection signal for a transmission was stored in a Deltic memory. The
C. S. Clay, W. L. Liang
openaire   +1 more source

The influence of bottom morphology on reflectance : theory and two-dimensional geometry model [PDF]

open access: yes
The reflectance of the bottom is of importance when interpreting optical data in shallow water. Closure studies of radiative transfer, interpretation of laser line scanner data, lidar, and remote sensing in shallow waters require understanding of the ...
Boss, Emmanuel, Zaneveld, J. Ronald
core   +3 more sources

Water Column Correction for Coral Reef Studies by Remote Sensing

open access: yesSensors, 2014
Human activity and natural climate trends constitute a major threat to coral reefs worldwide. Models predict a significant reduction in reef spatial extension together with a decline in biodiversity in the relatively near future.
Maria Laura Zoffoli   +2 more
doaj   +1 more source

Bottom Reflectance Influence on a Color Correction Algorithm for Underwater Images

open access: yes, 2003
Diminishing the negative effects of water column introduced on digital underwater images is the aim of a color correction algorithm presented by the authors in a previous paper.
Åhlén, Julia,, Sundgren, David,
core   +5 more sources

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