Rapid Mapping of Hydrological Systems in Tanzania Using a Towed Transient Electromagnetic System

Ground Water ◽  
2021 ◽  
Author(s):  
Denys Grombacher ◽  
Pradip Kumar Maurya ◽  
Johan Christensen Lind ◽  
John Lane ◽  
Esben Auken
Keyword(s):  
Electromagnetic System ◽  
Rapid Mapping ◽  
Transient Electromagnetic

Drone-borne transient electromagnetic system and its application in UXO detection

2018 ◽  
Author(s):  
Zhi-peng Qi ◽  
Xiu Li ◽  
He Li ◽  
Ying-ying Zhang ◽  
Jianmei Zhou
Keyword(s):  
Electromagnetic System ◽  
Transient Electromagnetic

Reducing Motion-Induced Noise With Mechanically Resonant Coil Sensor in a Rigid Helicopter Transient Electromagnetic System

2020 ◽  
Vol 67 (3) ◽  
pp. 2391-2401
Author(s):  
Fei Liu ◽  
Jun Lin ◽  
Yanzhang Wang ◽  
Shilong Wang ◽  
Quan Xu ◽  
...  
Keyword(s):  
Electromagnetic System ◽  
Transient Electromagnetic

Newmont Transient Electromagnetic System

1980 ◽  
Vol 11 (1-2) ◽  
pp. 47-51 ◽  
Author(s):  
G. O. Dickson ◽  
G. W. Boyd
Keyword(s):  
Electromagnetic System ◽  
Transient Electromagnetic

scholarly journals IMPROVED BUCKING COIL DESIGN IN HELICOPTER TRANSIENT ELECTROMAGNETIC SYSTEM

2017 ◽  
Vol 60 ◽  
pp. 131-139 ◽  
Author(s):  
Pan Xiao ◽  
Zongyang Shi ◽  
Xin Wu ◽  
Guangyou Fang
Keyword(s):  
Coil Design ◽  
Electromagnetic System ◽  
Transient Electromagnetic

The transient EM step response of a dipping plate in a conductive half‐space

Geophysics ◽  
1992 ◽  
Vol 57 (9) ◽  
pp. 1116-1126 ◽  
Author(s):  
James E. Hanneson
Keyword(s):  
Half Space ◽  
Free Space ◽  
Early Time ◽  
Step Response ◽  
Current Loop ◽  
Late Time ◽  
Electromagnetic System ◽  
University Of Toronto ◽  
Transient Electromagnetic ◽  
Induction Process

An algorithm for computing the transient electromagnetic (TEM) response of a dipping plate in a conductive half‐space has been developed. For a stationary [Formula: see text] current loop source, calculated profiles simulate the response of the University of Toronto electromagnetic system (UTEM) over a plate in a 1000 Ω ⋅ m half‐space. The objective is to add to knowledge of the galvanic process (causing poloidal plate currents) and the local induction process (causing toroidal currents) by studying host and plate currents with respect to surface profiles. Both processes can occur during TEM surveys. Plates are all [Formula: see text] thick with various depths, dips, and conductances. Calculated host and plate currents provide quantitative examples of several effects. For sufficiently conductive plates, the late time currents are toroidal as for a free‐space host. At earlier times, or at all times for poorly conducting plates, the plate currents are poloidal, and the transitions to toroidal currents, if they occur, are gradual. At very late times, poloidal currents again dominate any toroidal currents but this effect is rarely observed. Stripped, point‐normalized profiles, which reflect secondary fields caused by the anomalous plate currents, illustrate effects such as early time blanking (caused by noninstantaneous diffusion of fields into the target), mid‐time anomaly enhancement (caused by galvanic currents), and late time plate‐in‐free‐space asymptotic behavior.

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