TY - GEN
T1 - Fast mapping and analysis of anthropogenic noise sources affecting MRS experiments
AU - Larsen, J.J.
AU - Dalgaard, E.
AU - Christiansen, P.
AU - Auken, E.
PY - 2014
Y1 - 2014
N2 - The applicability of the magnetic resonance sounding (MRS) technique in urbanized areas is limited by the inherently weak signal from the subsurface water which is often deeply buried in noise from anthropogenic sources. The noise can have spatially variations on even sub-100 m scales and the signal to noise ratio of an MRS measurement can therefore be optimized by a careful choice of the exact location. In this paper we present an instrument for fast mapping and analysis of the noise conditions at a site prior to MRS experiments. The main components of the instrument are two induction receiver coils connected to amplifiers and a digital oscilloscope controlled by a PC. Analysis of the gathered data reveals the spatial distribution of the different noise components, in particular powerline harmonics and spikes. A comprehensive noise map of a test site is presented and analyzed.
AB - The applicability of the magnetic resonance sounding (MRS) technique in urbanized areas is limited by the inherently weak signal from the subsurface water which is often deeply buried in noise from anthropogenic sources. The noise can have spatially variations on even sub-100 m scales and the signal to noise ratio of an MRS measurement can therefore be optimized by a careful choice of the exact location. In this paper we present an instrument for fast mapping and analysis of the noise conditions at a site prior to MRS experiments. The main components of the instrument are two induction receiver coils connected to amplifiers and a digital oscilloscope controlled by a PC. Analysis of the gathered data reveals the spatial distribution of the different noise components, in particular powerline harmonics and spikes. A comprehensive noise map of a test site is presented and analyzed.
UR - http://www.scopus.com/inward/record.url?scp=85088196190&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.20141953
DO - 10.3997/2214-4609.20141953
M3 - Conference article in proceedings
AN - SCOPUS:85088196190
T3 - Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics
BT - Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics
PB - European Association of Geoscientists and Engineers, EAGE
T2 - 20th European Meeting of Environmental and Engineering Geophysics of EAGE's Near Surface Geoscience Division
Y2 - 14 September 2014 through 18 September 2014
ER -