Results 81 to 90 of about 200 (137)

Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity. [PDF]

Nat Commun
Ouellet SM, Dettmer J, Lato MJ, Cole S, Hutchinson DJ, Karrenbach M, Dashwood B, Chambers JE, Crickmore R.   +8 more
europepmc   +1 more source

Enhancement of borehole radar‐proving data by new antenna system with circular directional resolution

, 2012
H. Weichart, F. Sender, R. Thierbach
core   +1 more source

Influence of feed line on DOA estimation with dipole array antenna for directional borehole radar

, 2010
Satoshi Ebihara, Hanaoka Hideharu, Okumura Takashi   +2 more
core   +1 more source

Early Warning Systems A State of the Art Analysis and Future Directions. [PDF]

Environ Dev, 2012
europepmc   +1 more source

Estimation of three-dimensional coherent source positions with a directional borehole radar by MUSIC algorithm

M. Sato, H. Niitsuma, S. Ebihara
core   +1 more source

Experimental Data of a directional Borehole Radar System for UXO detection

, 2005
Waard, R. van, Baan, S. van der, Dongen, K.W.A. van   +2 more
core  

Singlehole borehole radar measurement with a thin directional borehole radar sonde

2013 7th International Workshop on Advanced Ground Penetrating Radar, 2013
This study demonstrates 3-D imaging of a fault using a thin (5.4 cm diameter) directional borehole radar sonde. In order to make the thin sonde, we needed to reduce interference between the centered conducting cylinder (CCC) and the antenna elements in the coaxial-fed circular dipole array in a borehole (CFCAB). Ferrite beads were loaded in the CCC for
Satoshi Ebihara, Yuta Kimura, Takaaki Shimomura, Ryota Uchimura   +3 more
exaly   +7 more sources

Analysis of Directional Borehole Radar Measurement Data

2007 4th International Workshop on, Advanced Ground Penetrating Radar, 2007
We developed a new directional borehole radar system with an array of optical electric field sensors as receivers. The system was tested in a field test site in order to assert its ability to detect three dimensional (3D) location of a subsurface tunnel.
T. Takayama, M. Sato, J. H. Kim
exaly   +3 more sources

Salt dome exploration by directional borehole radar wireline service

Proceedings of the XIII Internarional Conference on Ground Penetrating Radar, 2010
3 D borehole radar, a standard logging method? This was the title of the paper, DMT contributed to the GPR conference 2000. Now this question can be answered. Since more than seven years DMT is applying directional borehole wireline services for salt dome exploration up to depths of 2000 m.
K Siever, R Elsen
exaly   +3 more sources

Fractures and rock properties estimated by 3D directional borehole radar

2015 8th International Workshop on Advanced Ground Penetrating Radar (IWAGPR), 2015
Borehole radar is widely used in civil engineering work such as fault and fracture exploration, salt dome investigation, tunnel detection, UXO detection, exploring locations of foundation piles and sheet metal piling walls, and so on. Borehole radar surveys in resistive rock field have been applied successfully due to the lower attenuation of the rock ...
S Ebihara
exaly   +3 more sources