Results 91 to 100 of about 2,389 (219)

Image-radargram analysis based on generalized Hough transform: experimental cases

Journal of Geophysics and Engineering, 2012
This paper presents an algorithm based on the generalized Hough transform (GHT) to enhance geological structures in a 2D profile image constructed from ground-penetrating radar data. The proposed algorithm is applied over an edge representation image of the radargram; its local application (in Windows) allows us to identify structures and to obtain a ...
Aixa M Rivera-Rios, Elsa Leticia Flores-Marquez   +1 more
openaire   +1 more source

A Fluvio‐Lacustrine Environment Preserved in the Jezero Crater Inlet Channel, Neretva Vallis, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Martian fluvial valleys provide evidence for the surface flow of liquid water, making them a key target for rover‐based investigations of ancient habitability. The Mars 2020 Perseverance rover spent ∼85 sols exploring the Bright Angel formation, exposed across the floor of Neretva Vallis: the western inlet channel of Jezero crater.
Alexander J. Jones, Robert Barnes, Sanjeev Gupta, Gerhard Paar, Joel Hurowitz, Brittan V. Wogsland, Adrian Broz, Hemani Kalucha, Athanasios Klidaras, Kathryn M. Stack, Patrick Russell, Briony Horgan, Bradley Garczynski, Melissa Rice, James F. Bell III, Jusin N. Maki, Svein‐Erik Hamran, Alicia Vaughan, Justin I. Simon, Oak Kanine, Stephanie A. Connell, Henry Manelski, Ashley Murphy, Olivier Beyssac, Nicolas Mangold, Olivier Gasnault, Christoph Traxler, Adrian Brown, David Flannery, Nicolas Randazzo, Jesús Martínez‐Frías, Kenneth A. Farley   +31 more
wiley   +1 more source

Where does a glacier end ? GPR measurements to identify the limits between the slopes and the real glacier area. Application to the Austre Lovénbreen, Spitsbergen -- 79°N

, 2014
International audienceGlacier limits are usually mapped according to a spatial discrimination based on color of remote sensing images or aerial photography.
Bernard, Eric, Friedt, Jean-Michel, Griselin, Madeleine, Marlin, Christelle, Saintenoy, Albane, Tolle, Florian   +5 more
core   +3 more sources

Case study: A GPR survey on a morainic lake in northern Italy for bathymetry, water volume and sediment characterization [PDF]

, 2012
We carried out an extensive waterborne GPR survey consisting of 50 profiles with a total length of nearly 37 km on the morainic lake of Candia northerly Turin (Italy). Our aim was to test the capability of GPR to estimate the bathymetry, the water volume
Annan, Arcone, Arcone, Arcone, Avnimelech, Beres, Best, Birchak, Bradford, Bradford, Butler, Buynevich, Cheng, Comino, Costa, Costa, Delaney, Dudley, Fuchs, Gianotti, Haeni, Hartke, Hunter, Jol, Kovacs, Lin, Luigi Sambuelli, Maxwell, Melcher, Mellett, Moorman, Moorman, Nyshadham, Park, Parkhomenko, Porsani, Powers, Reynolds, Sambuelli, Sambuelli, Sambuelli, Schwamborn, Sellmann, Shields, Silvia Bava, Ullman   +45 more
core   +1 more source

Comparative Evaluation of YOLO Architectures for Automated Detection of Buried Manhole Covers in GPR Radargrams

IET Smart Cities, Volume 8, Issue 1, January/December 2026.
This study compares three YOLO architectures for detecting buried manholes in GPR radargrams, finding that YOLOv5s achieved optimal performance (accuracy 0.7865, mAP@0.5 0.7950) under small‐data conditions with superior stability. Physical signal degradation from soil compaction and burial depth—rather than algorithmic limitations—ultimately ...
Jantana Panyavaraporn, Sitthiphat Eua‐apiwatch   +1 more
wiley   +1 more source

URS: An Unsupervised Radargram Segmentation Network Based on Self-Supervised ViT With Contrastive Feature Learning Framework

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Radar sounders are air and space-borne nadir-looking sensors operating in high-frequency (HF) or very high-frequency (VHF) bands and collect subsurface backscattered returns by transmitting electromagnetic pulses.
Raktim Ghosh, Francesca Bovolo
doaj   +1 more source

A 3D Reconstruction Algorithm for the Location of Foundations in Demolished Buildings [PDF]

, 2013
The location of foundations in a demolished building can be accomplished by undertaking a Ground Penetrating Radar (GPR) survey and then to use the GPR data to generate 3D isosurfaces of what was beneath the soil surface using image reconstruction.
Cockshott, W. Paul, Cuenca-Garcia, Carmen, Sengodan, Anand   +2 more
core  

Magnetic and ground penetrating radar for the research of Medieval buried structures in Marche Region [PDF]

, 2010
A magnetic and Ground Penetrating Radar joint survey was carried out in the framework of the R.I.M.E.M. project that has the aim of supporting the archaeological prospections and drive the selection of the excavation areas related to the Late Roman ...
A. LEOPERTE, M. BAVUSI, MOSCATELLI, Umberto, S. MINGUZZI, V. LAPENNA   +4 more
core   +2 more sources

A revised and expanded deep radiostratigraphy of the Greenland Ice Sheet from airborne radar sounding surveys between 1993 and 2019 [PDF]

Earth System Science Data
Between 1993 and 2019, NASA and NSF sponsored 26 separate airborne campaigns that surveyed the thickness and radiostratigraphy of the Greenland Ice Sheet using successive generations of coherent VHF radar sounders developed and operated by The University
J. A. MacGregor, M. A. Fahnestock, J. D. Paden, J. Li, J. P. Harbeck, A. Aschwanden   +5 more
doaj   +1 more source

Non-destructive evaluation of moisture content in wood using ground-penetrating radar [PDF]

, 2016
This paper presents the results of a series of laboratory measurements, carried out to study how the ground-penetrating radar (GPR) signal is affected by moisture variation in wood material.
Chinh Maï, Tien, Kiri, Emanuela, Mehdi Sbartaï, Zoubir, Pajewski, Lara, Reci, Hamza   +4 more
core   +3 more sources