Results 1 to 10 of about 198,602 (116)

Red-edge position of habitable exoplanets around M-dwarfs [PDF]

open access: yesScientific Reports, 2017
One of the possible signs of life on distant habitable exoplanets is the red-edge, which is a rise in the reflectivity of planets between visible and near-infrared (NIR) wavelengths.
Kenji Takizawa   +4 more
doaj   +2 more sources

The Impact of NPV on the Spectral Parameters in the Yellow-Edge, Red-Edge and NIR Shoulder Wavelength Regions in Grasslands

open access: yesRemote Sensing, 2022
Even though research has shown that the spectral parameters of yellow-edge, red-edge and NIR (near-infrared) shoulder wavelength regions are able to estimate green cover and leaf area index (LAI), a large amount of dead materials in grasslands challenges
Dandan Xu   +3 more
doaj   +3 more sources

Extracting Red Edge Position Parameters from Ground- and Space-Based Hyperspectral Data for Estimation of Canopy Leaf Nitrogen Concentration in Rice

open access: yesPlant Production Science, 2011
To realize non-destructive and real-time monitoring of crop nitrogen status for precision management in rice fertilization, we characterized the reflectance spectra in the red edge area from ground- and space-based data, and quantified the relationships ...
Yongchao Tian   +4 more
doaj   +2 more sources

Imaging spectroscopy for bark beetle detection in Norway spruce and the relevance of the red-edge spectral range

open access: yesInternational Journal of Applied Earth Observations and Geoinformation
In this study, hyperspectral data of two geographically distant study areas in Germany were analyzed to find the most effective spectral wavelengths for red-edge-based vegetation indices to differentiate bark beetle-infested Norway spruce into three ...
Alexander Marx   +5 more
doaj   +3 more sources

Narrow band based and broadband derived vegetation indices using Sentinel-2 Imagery to estimate vegetation biomass [PDF]

open access: yesGlobal Journal of Environmental Science and Management, 2020
Forest’s ecosystem is one of the most important carbon sink of the terrestrial ecosystem. Remote sensing technology provides robust techniques to estimate biomass and solve challenges in forest resource assessment.
A.B. Imran   +5 more
doaj   +1 more source

Analysis of Cadmium Contamination in Lettuce (Lactuca sativa L.) Using Visible-Near Infrared Reflectance Spectroscopy

open access: yesSensors, 2023
In order to rapidly and accurately monitor cadmium contamination in lettuce and understand the growth conditions of lettuce under cadmium pollution, lettuce is used as the test material.
Lina Zhou   +6 more
doaj   +1 more source

Estimation of corn chlorophyll content using different red edge position algorithms

open access: yes浙江大学学报. 农业与生命科学版, 2021
This research was based on the combined planting model of corn-soybean strip intercropping and the corns under different nitrogen levels were used as the test materials.
ZHANG Jiawei   +5 more
doaj   +1 more source

Hyperspectral Estimation Models of Winter Wheat Chlorophyll Content Under Elevated CO2

open access: yesFrontiers in Plant Science, 2021
Chlorophyll content is an important indicator of winter wheat health status. It is valuable to investigate whether the relationship between spectral reflectance and the chlorophyll content differs under elevated CO2 condition.
Yao Cai, Yuxuan Miao, Hao Wu, Dan Wang
doaj   +1 more source

Leaf reflectance and functional traits as environmental indicators of urban dust deposition

open access: yesBMC Plant Biology, 2021
Background How to quickly predict and evaluate urban dust deposition is the key to the control of urban atmospheric environment. Here, we focus on changes of plant reflectance and plant functional traits due to dust deposition, and develop a prediction ...
Jiyou Zhu   +7 more
doaj   +1 more source

Ground Hyper-Spectral Remote-Sensing Monitoring of Wheat Water Stress during Different Growing Stages

open access: yesAgronomy, 2022
Monitoring agricultural drought via ground hyper-spectral remote sensing has always been a hot topic in the fields of agriculture and meteorology.
Qiang Li, Maofang Gao, Zhao-Liang Li
doaj   +1 more source

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