Subsurface Detection 3 – Half-Space Model
The receiver is co-planar with the dipole source on a surface (z = 0). In the simplest manifestation, the model consists … Read the rest
Subsurface
Subsurface
Subsurface Detection 2 – System Geometry
Let’s assume an ideal and homogeneous half-space. The electromagnetic fields created from a magnetic dipole have… Read the rest
Subsurface
Subsurface Detection 1 – Preliminary Considerations
In the broadest sense, electrical, magnetic, and electromagnetic exploration and detection techniques are generally… Read the rest
Subsurface
Subsurface Conductor Detection
I received my education at two universities which were formed with a heavy mining emphasis: Nevada-Reno with Mackay School… Read the rest
article
Line Termination
Is coax a waveguide ? … or just a piece of shielded wire?
Do I really need 50 or 75 Ω resistors at the end of my signals?… Read the rest
Filtering
Filtering – Part 9
So .. I spent a lot of pages talking of filtering and the spectrum that results from the Fourier analysis of a time series. … Read the rest
Filtering
Filtering – Part 8
Part 7 investigated signals of two frequencies with sinusoidal phase shift. For the most part, the sample frequency and… Read the rest
Filtering
Filtering – Part 7
Consider a situation in which an airborne measurement platform travels in the x-direction while the measurement instrument… Read the rest
Filtering
Filtering – Part 6
I left the last section with a moderately complex continuous-time waveform segment and a demonstration that a mathematically… Read the rest
Filtering
Filtering – Part 5
To this point, I’ve been considering single-frequency sine waves but most signals consist of a “sum-of-sines”.… Read the rest