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

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

Sci Rep, 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.
Takizawa K, Minagawa J, Tamura M, Kusakabe N, Narita N.   +4 more
europepmc   +2 more sources

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

Remote 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, Yanqing Liu, Weixin Xu, Xulin Guo   +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

Plant 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, Xia Yao, Jie Yang, Weixing Cao, Yan Zhu   +4 more
doaj   +2 more sources

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

International 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, Anne Clasen, Johannes May, Simon König, Birgit Kleinschmit, Michael Förster   +5 more
doaj   +3 more sources

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

Global 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, K. Khan, N. Ali, N. Ahmad, A. Ali, K. Shah   +5 more
doaj   +1 more source

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

Sensors, 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, Leijinyu Zhou, Hongbo Wu, Lijuan Kong, Jinsheng Li, Jianlei Qiao, Limei Chen   +6 more
doaj   +1 more source

Estimation of corn chlorophyll content using different red edge position algorithms

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, WANG Zhonglin, TAN Xianming, WANG Beibei, YANG Wenyu, YANG Feng   +5 more
doaj   +1 more source

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

BMC 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, Jingliang Xu, Yujuan Cao, Jing Fu, Benling Li, Guangpeng Sun, Xinna Zhang, Chengyang Xu   +7 more
doaj   +1 more source

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

Agronomy, 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

Planar bichromatic bottleneck spanning trees

Journal of Computational Geometry, 2021
Given a set $P$ of red and blue points in the plane, a planar bichromatic spanning tree of $P$ is a geometric spanning tree of $P$, such that each edge connects a red and a blue point, and no two edges intersect.
Karim Abu-Affash, Sujoy Bhore, Paz Carmi, Joseph Mitchell   +3 more
doaj   +1 more source