Results 11 to 20 of about 406,860 (186)

Analysis of the Effectiveness of the Red-Edge Bands of GF-6 Imagery in Forest Health Discrimination

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The red-edge band is closely related to biochemical parameters that characterize the growth condition of green plants and is an important factor in monitoring vegetation health.
Jiahui Chen, Hanqiu Xu
doaj   +3 more sources

Normalized Difference Red-Edge Estimation With Modified DiscoGAN Model

open access: yesIEEE Access
Vegetation information is important to study the health and productivity of farmlands and forest ecosystems and investigate the types and severity of threats to them.
Hyeon-Beom Choi   +2 more
doaj   +2 more sources

Evaluation of Sentinel-2 Red-Edge Bands for Empirical Estimation of Green LAI and Chlorophyll Content

open access: yesSensors, 2011
ESA’s upcoming satellite Sentinel-2 will provide Earth images of high spatial, spectral and temporal resolution and aims to ensure continuity for Landsat and SPOT observations.
José Moreno   +3 more
doaj   +3 more sources

Active-Optical Sensors Using Red NDVI Compared to Red Edge NDVI for Prediction of Corn Grain Yield in North Dakota, U.S.A. [PDF]

open access: yesSensors, 2015
Active-optical sensor readings from an N non-limiting area standard established within a farm field are used to predict yield in the standard. Lower yield predictions from sensor readings obtained from other parts of the field outside of the N non ...
Lakesh K. Sharma   +3 more
doaj   +2 more sources

Ground versus aerial canopy reflectance of corn: Red‐edge and non‐red edge vegetation indices [PDF]

open access: yesAgronomy Journal, 2021
AbstractConstant‐rate blanket applications of fertilizer N can result in both an over and under supply relative to crop utilization on a field‐by‐field basis. Variable‐rate (VR) applications tailored to better meet crop demand can improve N use efficiency on spatially variable soils.
Zachary Sumner   +5 more
openaire   +1 more source

A New Method for Estimating Soil Fertility Using Extreme Gradient Boosting and a Backpropagation Neural Network

open access: yesRemote Sensing, 2022
Soil fertility affects crop yield and quality. A quick, accurate evaluation of soil fertility is crucial for agricultural production. Few satellite image-based evaluation studies have quantified soil fertility during the crop growth period.
Yiping Peng   +7 more
doaj   +1 more source

The ZZ Ceti red edge [PDF]

open access: yesAstronomy & Astrophysics, 2002
With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11 000 K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11 000 K have been carried out using time ...
Kanaan, A., Kepler, S. O., Winget, D. E.
openaire   +2 more sources

Alpha and beta phylogenetic diversities jointly reveal ant community assembly mechanisms along a tropical elevational gradient

open access: yesScientific Reports, 2022
Despite the long-standing interest in the organization of ant communities across elevational gradients, few studies have incorporated the evolutionary information to understand the historical processes that underlay such patterns.
Gibran Renoy Pérez-Toledo   +5 more
doaj   +1 more source

Low-Cost Hyperspectral Imaging to Detect Drought Stress in High-Throughput Phenotyping

open access: yesPlants, 2023
Recent developments in low-cost imaging hyperspectral cameras have opened up new possibilities for high-throughput phenotyping (HTP), allowing for high-resolution spectral data to be obtained in the visible and near-infrared spectral range.
Andrea Genangeli   +11 more
doaj   +1 more source

Towards High-Resolution Land-Cover Classification of Greenland: A Case Study Covering Kobbefjord, Disko and Zackenberg

open access: yesRemote Sensing, 2021
Mapping of the Arctic region is increasingly important in light of global warming as land cover maps can provide the foundation for upscaling of ecosystem properties and processes.
Daniel Alexander Rudd   +2 more
doaj   +1 more source

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