Results 21 to 30 of about 501,588 (251)

Improving the Accuracy of TanDEM-X Digital Elevation Model Using Least Squares Collocation Method

open access: yesRemote Sensing, 2023
The TanDEM-X Digital Elevation Model (DEM) is limited by the radar side-view imaging mode, which still has gaps and anomalies that directly affect the application potential of the data. Many methods have been used to improve the accuracy of TanDEM-X DEM,
Xingdong Shen, Cui Zhou, Jianjun Zhu
doaj   +1 more source

Investigating the Impact of Digital Elevation Models on Sentinel-1 Backscatter and Coherence Observations

open access: yesRemote Sensing, 2020
Spaceborne remote sensing can track ecosystems changes thanks to continuous and systematic coverage at short revisit intervals. Active remote sensing from synthetic aperture radar (SAR) sensors allows day and night imaging as they are not affected by ...
Ignacio Borlaf-Mena   +4 more
doaj   +1 more source

Trolox and ascorbic acid reduce direct and indirect oxidative stress in the IPEC-J2 cells, an in vitro model for the porcine gastrointestinal tract [PDF]

open access: yes, 2015
Oxidative stress in the small intestinal epithelium is a major cause of barrier malfunction and failure to regenerate. This study presents a functional in vitro model using the porcine small intestinal epithelial cell line IPEC-J2 to examine the effects ...
De Smet, Stefaan   +7 more
core   +2 more sources

The effect of grid size on the quantification of erosion, deposition, and rill network

open access: yesInternational Soil and Water Conservation Research, 2017
Hillslope rill/interrill erosion has been investigated from the perspective of runoff transport of sediment. Recent advances in terrestrial laser scanning can provide high-resolution elevation data up to centimeter levels, and temporal digital elevation ...
Xiaoyu Lu   +5 more
doaj   +1 more source

RELATIVE ERROR EVALUATION TO TYPICAL OPEN GLOBAL DEM DATASETS IN SHANXI PLATEAU OF CHINA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Produced by radar data or stereo remote sensing image pairs, global DEM datasets are one of the most important types for DEM data. Relative error relates to surface quality created by DEM data, so it relates to geomorphology and hydrologic applications ...
S. Zhao, S. Zhang, W. Cheng
doaj   +1 more source

The Developmental Eye Movement Test as a Diagnostic Aid in Cerebral Visual Impairment

open access: yesFrontiers in Human Neuroscience, 2021
The symptoms that characterize children with cerebral visual impairments (CVI) are diverse, ranging from extensive behavioral or physical disabilities to subtle changes that can easily be missed. A correct diagnosis of CVI is therefore difficult to make,
Nouk Tanke   +6 more
doaj   +1 more source

ANALYSIS AND COMPARISON OF SRTM3 DEM AND ASTER GDEM V2 [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Global Geographic Information Resources Construction and Maintenance Renewal Project is in urgent need of digital elevation model worldwide. At present, the errors of ASTER GDEMv2 and SRTM3 DEM data widely used are unevenly distributed.
J. Shen, W. L. Han, L. B. Zhang, J. Ge
doaj   +1 more source

SRTM DEM Correction in Vegetated Mountain Areas through the Integration of Spaceborne LiDAR, Airborne LiDAR, and Optical Imagery

open access: yesRemote Sensing, 2015
The Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) is one of the most complete and frequently used global-scale DEM products in various applications.
Yanjun Su   +3 more
doaj   +1 more source

Comparative analysis of the differences between using LiDAR and contour-based DEMs for hydrological modeling of runoff generating debris flows in the Dolomites [PDF]

open access: yes, 2015
Present work aims to explore the differences in hydrological modeling when using digital elevation models (DEMs) generated by points from LiDAR surveys and those digitized on the contour lines of the regional technical map (RTM) and their relevance for ...
Bernard, Martino   +2 more
core   +2 more sources

On the uncertainty of stream networks derived from elevation data: the error propagation approach [PDF]

open access: yes, 2010
DEM error propagation methodology is extended to the derivation of vector-based objects (stream networks) using geostatistical simulations. First, point sampled elevations are used to fit a variogram model.
Hengl, T.   +2 more
core   +2 more sources

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