Fabio Giannino - Electromagnetic Methods in Geophysics

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Discover the utility of four popular electromagnetic geophysical techniques In
, accomplished researchers Fabio Giannino and Giovanni Leucci deliver an in-depth exploration of the theory and application of four different electromagnetic geophysical techniques: ground penetrating radar, the frequency domain electromagnetic method, the time domain electromagnetic method, and the airborne electromagnetic method. The authors offer a full description of each technique as they relate to the economics, planning, and logistics of deploying each of them on-site.
The book also discusses the potential output of each method and how it can be combined with other sources of below- and above-ground information to create a digitized common point cloud containing a wide variety of data.
Giannino and Leucci rely on 25 years of professional experience in over 40 countries around the world to provide readers with a fulsome description of the optimal use of GPR, FDEM, TDEM, and AEM, demonstrating their flexibility and applicability to a wide variety of use cases.
Readers will also benefit from the inclusion of:
A thorough introduction to electromagnetic theory, including the operative principles and theory of ground penetrating radar (GPR) and the frequency domain electromagnetic method (FDEM) An exploration of hardware architecture and surveying, including GPR, FDEM, time domain electromagnetic method (TDEM), and airborne electromagnetic (AEM) surveying A collection of case studies, including a multiple-geophysical archaeological GPR survey in Turkey and a UXO search in a building area in Italy using FDEM /li> Discussions of planning and mobilizing a campaign, the shipment and clearance of survey equipment, and managing the operative aspects of field activity Perfect for forensic and archaeological geophysicists,
will also earn a place in the libraries of anyone seeking a one-stop reference for the planning and deployment of GDR, FDEM, TDEM, and AEM surveying techniques.

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6m depth: (a) IDS GeoRadar Stream C, (b) ...Figure 3.42 The real‐time display of GPR data.Figure 3.43 (a) GPR raw data; (b) GPR time‐zero correction data. Red arrow i...Figure 3.44 (a) Radar section with a coherent effect related to antenna‐grou...Figure 3.45 (a) Radar section with a coherent banding effect (ringing), the ...Figure 3.46 (a) Radar section without gain function, (b) moderate gain funct...Figure 3.47 Radar section with topographical correction.Figure 3.48 Effect of band pass filter on both the spectrum and single trace...Figure 3.49 (a) GPR raw data, (b) GPR band‐pass filtered data.Figure 3.50 (a) GPR antenna passing on a buried tube, (b) typical reflection...Figure 3.51 (a) GPR raw data, (b) GPR migrated data. Is possible to see (red...Figure 3.52 F‐K filter applied to remove signal (noise) originating from obj...Figure 3.53 Schematization of the construction of a time sliceFigure 3.54 Choice of the two‐way time interval dt in the construction of th...Figure 3.55 (a) GPR raw data; (b) traces envelope; (c) thresholding; (d) 3D ...Figure 3.56 The 3D visualization of GPR data by amplitude iso‐surfaces.Figure 3.57 different types of ray‐paths (R: reflected; T transmitted) from ...Figure 3.58 GPR data acquired in the Co‐Cathedral of Saint John: (a) scheme ...Figure 3.59 Forward GPR model for data acquisition below a dome.Figure 3.60 Forward model: two homogeneous layers with a dielectric constant...Figure 3.61 Forward model: radar section with the evidenced polarity of the ...Figure 3.62 The 600 MHz processed radar section.Figure 3.63 Archaeological find in Calle Mantas, one of the entrance ways to...Figure 3.64 GPR processed data acquired on a fractured medium: (a) raw data;...Figure 3.65 (a) Estimated EM‐wave velocity propagation using the hyperbola d...

3 Chapter 4Figure 4.1 Sketch of an electromagnetometer. Tx is the transmitting coil, Rx...Figure 4.2 GCM Geonics Ltd EM31 MK‐2 during the acquisition phases of a surv...Figure 4.3 GCM GSSI Inc EMP‐400 during the acquisition phases of a survey.Figure 4.4 GCM Dualem 6s, during the acquisition phases of a survey.Figure 4.5 Data acquisition. Possible problems of under‐sampling or over‐sam...Figure 4.6 Data acquisition. Black line represents the possible position of ...Figure 4.7 Data acquisition in the case of an unknown shaped target. In “A” ...Figure 4.8 Data acquisition. In the area bordered by the blue polygon, an in...Figure 4.9 Data acquisition. Stationary acquisition mode (or “Point by Point...Figure 4.10 Data acquisition. Positioning of the stations in the stationary ...Figure 4.11 Data acquisition. Acquisition mode continuous without GNSS.Figure 4.12 Data acquisition. Acquisition mode continuous with GPS.Figure 4.13 Data acquisition. Example of correction of GNSS positions.Figure 4.14 Data acquisition. Example of data shown on the screen of the int...Figure 4.15 Data analysis. Example of GNSS (positioning, geographic coordina...Figure 4.16 Data analysis. Example of data file ready for the following proc...Figure 4.17 Data analysis. Example of Apparent Electric Conductivity map.Figure 4.18 example of the graph showing the in‐phase component with respect...Figure 4.19 example of inverted 2D section of conductivity obtained by using...Figure 4.20 example of inverted 3D map at a given depth of conductivity obta...

4 Chapter 5Figure 5.1 Sketch of the essential (minimum) parts describing a system to ca...Figure 5.2 Scheme of functioning of a TDEM survey.Figure 5.3 1D TDEM sounding.Figure 5.4 Example of 1D model of the subsoil after 1D inversion of TDEM dat...Figure 5.5 Example of 2D section along the XZ plan, obtained after interpola...Figure 5.6 Example of 2D section along the XY plan, obtained after interpola...

5 Chapter 6Figure 6.1 Sketch of the essential (minimum) parts describing a system to ca...Figure 6.2 Scheme of functioning of an AEM survey.Figure 6.3 Typical 1D AEM sounding.Figure 6.4 Example of part of a flight plan for a AEM campaign.Figure 6.5 A data processing window showing portions of data deleted because...Figure 6.6 The trapezoid shaped averaging core: data are averaged over large...Figure 6.7 Altimetry data processing. (a) Raw data, (b) after a first phase ...Figure 6.8 Tilt‐meter data processingFigure 6.9 Data processing. The phase of couplings removal and filtering. Gr...Figure 6.10 Inversion of AEM data. In (d) the actual geological section is i...Figure 6.11 Example of 1D model of the subsoil after 1D inversion of TDEM da...Figure 6.12 Example of Electrical Resistivity 2D section along the XZ plan, ...Figure 6.13 Example of Electrical Resistivity 2D plan along the XY plan, at ...Figure 6.14 Example of Electrical Chargeability 2D plan along the XY plan, a...

6 Chapter 7Figure 7.1 The Martyrium of St Philip planimetry with the surveyed area high...Figure 7.2 The processed radar sections related to the profiles a) 11, b) 19...Figure 7.3 The time slices.Figure 7.4 Iso‐surface visualization of the envelope of the migrated data (5...Figure 7.5 FDEM slice map of the electrical conductivity (EC): a) 14025Hz; b...Figure 7.6 The geophysical surveyed areas.Figure 7.7 Area 2 time slices related to 600MHz antenna GPR data.Figure 7.8 Area 2 time slices related to 200MHz antenna GPR data.Figure 7.9 Area 2: time slices: (a) 75–115 cm depth related to the GPR data ...Figure 7.10 Area 3 time slices related to 600MHz antenna GPR data.Figure 7.11 Area 3 time slices related to 200MHz antenna GPR data.Figure 7.12 Area 3: time slices 290‐320cm depth related to the GPR data acqu...Figure 7.13 Area 3: Examples of three‐dimensional visualizations by means of...Figure 7.14 GPR profiles location: a) on the Sanctuary and its north‐west si...Figure 7.15 Processed radar sections related to the R1, R2 and R3 profile ac...Figure 7.16 Sanctuary: (a) R3 processed radar section, (b) seismic depth sli...Figure 7.17 The Sanctuary GPR depth slices.Figure 7.18 The Sanctuary planimetry overlap the GPR slice at depth ranging ...Figure 7.19 The depth slices at north‐east side of the sanctuary area.Figure 7.20 time slices.Figure 7.21 The Archaeological site of Pyrgi near Santa Severe, Rome (Italy)...Figure 7.22 The Stream X system at Pyrgi site. The excavated sector is in th...Figure 7.23 The survey area.Figure 7.24 Coverage of the GPR survey at the Pyrgi site. Blue polygons indi...Figure 7.25 Time slice at ‐0.2 meters.Figure 7.26 Time slice at ‐0.4 meters.Figure 7.27 Time slice at ‐0.8 meters.Figure 7.28 Time slice at ‐1 meter.Figure 7.29 Lecce ‐ Piazza Duomo. Location of the religious building investi...Figure 7.30 Plan of the Lecce Cathedral. Hypothetical reconstruction of the ...Figure 7.31 Photos (on the left) and plan (on the right) of the crypt under ...Figure 7.32 Lecce Cathedral, crypt under the transept: elaborated radar sect...Figure 7.33 Lecce Cathedral, crypt under the transept: GPR time slice 270 MH...Figure 7.34 Lecce Cathedral, crypt under the transept, GPR time slices (270 ...Figure 7.35 3D iso‐surfaces related to three depth range: (a) 0.0‐1.0 m, (b)...Figure 7.36 Lecce Cathedral: GPR profiles along the northern nave (600 MHz a...Figure 7.37 Lecce Cathedral: GPR profiles along the northern nave (200 MHz a...Figure 7.38 Lecce Cathedral: GPR time slice (200 MHz antenna; depth correspo...Figure 7.39 Lecce Cathedral: GPR time slice (200 MHz antenna; depth correspo...Figure 7.40 Lecce Cathedral: GPR time slice (200 MHz antenna; depth correspo...Figure 7.41 Lecce Cathedral: 3D visualization shows the distribution of the ...Figure 7.42 The study area in Ventarron (north Peru).Figure 7.43 The surveyed areas.Figure 7.44 Area 1: the processed radar section related to profile R5.Figure 7.45 Area 1: Depth slices.Figure 7.46 Area 1: the 3D representation by iso‐surface amplitude of the EM...Figure 7.47 Area 1: exavation results.Figure 7.48 Area 2: the processed radar section related to profile R3.Figure 7.49 Area 2: Depth slices.

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