Determination of critical contour area in SAR images of concrete for subsurface moisture sensing

2021 ◽  
Author(s):  
Ahmed Alzeyadi ◽  
Tzuyang Yu
Keyword(s):  
Sar Images ◽  
Moisture Sensing

Contribution of SAR images to determination of surface moisture on the Menemen Plain, Turkey

2009 ◽  
Vol 30 (7) ◽  
pp. 1805-1817 ◽  
Author(s):  
Y. Kurucu ◽  
F. Balik Sanli ◽  
M. T. Esetlili ◽  
M. Bolca ◽  
C. Goksel
Keyword(s):  
Sar Images ◽  
Surface Moisture

Use of SAR images in the determination of internal wave parameters: an application case to the Strait of Gilbraltar

2004 ◽  
Author(s):  
Agueda Vazquez Lopez-Escobar ◽  
Miguel Bruno Mejias ◽  
Jesus Gomez-Enri ◽  
Luis Mariscal
Keyword(s):  
Internal Wave ◽  
Sar Images ◽  
Wave Parameters

scholarly journals WATERLINE DETECTION AND MONITORING IN THE GERMAN WADDEN SEA USING HIGH RESOLUTION SATELLITE-BASED RADAR MEASUREMENTS

2015 ◽  
Vol XL-7/W3 ◽  
pp. 1029-1033 ◽  
Author(s):  
S. Wiehle ◽  
S. Lehner ◽  
A. Pleskachevsky
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Wadden Sea ◽  
Coastal Region ◽  
Sar Images ◽  
Ship Traffic ◽  
Water Currents ◽  
Flat Structures ◽  
Radar Measurements

High resolution TerraSAR-X/TanDEM-X as well as Sentinel-1 remote sensing Synthetic Aperture Radar (SAR) data are used to determine and monitor the waterline in the Wadden Sea. In this very unique and dynamic coastal region in the southeastern North Sea, tidal flats extend several kilometers away from the coast during low tide with features like tidal inlets and sand banks. Under the influence of tidal water currents transporting large amounts of eroded material, inlets and sand banks move over time; heavy storms can even cause large variations in their extensions in merely a few hours. Observation of these obstacles is crucial for maritime security as high ship traffic is caused by the ports of Hamburg, Bremerhaven, Wilhelmshaven and others. Conventional monitoring campaigns with ships or airplanes are economically expensive and can only provide limited coverage. We present an automatic algorithm with Near Real-Time capability for extracting the waterline at the time of recording from SAR images, which allows for a fast and large scale determination of changes in coastal outlines. The comparison of recent acquisitions of TerraSAR-X and Sentinel-1 to bathymetry data of the Elbe estuary obtained in 2010 reveals significant changes in tidal flat structures.

scholarly journals Determination of Ground Subsidence by Sentinel-1 SAR Data (2018-2020) over Binh Duong Quarries, Vietnam

2021 ◽  
Vol 37 (2) ◽  
Author(s):  
Nguyen Quoc Long ◽  
Tran Van Anh ◽  
Bui Khac Luyen
Keyword(s):  
Land Subsidence ◽  
Survey Methods ◽  
Satellite System ◽  
Ground Subsidence ◽  
Small Scale ◽  
Large Area ◽  
Sar Images ◽  
Surrounding Areas ◽  
Global Navigation Satellite

Mining-induced subsidence is often determined by field survey methods, e.g., using total station or global navigation satellite system (GNSS) technology. The advantage of these methods is high accuracy, but they are usually employed in a small-scale areas. Radar technology has been developed and applied to determine surface subsidence over a large area at a few millimeters accuracy. In this paper, 24 Sentinel-1B SAR images are used with the Permanent Scatter Interferometry (PSInSAR) method to determine the land subsidence of the Tan My-Thuong Tan quarries and surrounding areas in Binh Duong province, Vietnam. The results are compared with the average annual subsidence of 20 GNSS surveying points from January 2018 to March 2020. The correlation coefficient of annual average land subsidence of the two methods is bigger than 0.8, indicating the feasibility of applying the InSAR Sentinel-1 data processed by the PSInSAR method to determine the mining-induced subsidence of ground surfaces over quarries and surrounding areas.  

Determination of Wave Field Properties in the Spatial Domain From Space Borne SAR Images

2003 ◽  
Author(s):  
Jose C. Nieto Borge ◽  
Andreas Niedermeier ◽  
Susanne Lehner ◽  
Wolfgang Rosenthal
Keyword(s):  
Offshore Structures ◽  
Global Scale ◽  
Sar Images ◽  
New Techniques ◽  
Single Wave ◽  
Local Wave ◽  
Wave Heights ◽  
Wave Groupiness ◽  
Local Variability

New techniques have been developed to study single wave events and wave groupiness from space borne SAR images of the sea surface. These techniques are based on the determination of wave groupiness features from the local wave envelope, estimated by using a two dimensional Hilbert transform, and the analysis of the local variability of the wave height within SAR images. This analysis is carried out on a global scale by using 34,310 SAR images, taken by the European satellite ERS-2. The obtained results are used to generate global maps of maximum wave heights, and other parameters of describing wave events, which are able to inform about potentially dangerous situations for navigation and offshore structures.

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