SNR on the Four Probe Measurement System at Earth Surface

Abstract

Abstract In the real world, the presence of noise is undeniable. Electric fields, magnetic fields, temperature changes, atomic structures, and so forth are contributing to the reality and the magnitude of noise. Data acquisition of physical quantities in nature is always needed, which subsequently is required for the interpretation in the laboratory. For this reason, the presence of noise needs to be eliminated or known. In the four-probe measurement system, the two electrodes are injecting current, while the other two electrodes are used for acquisition of the arising voltage. The voltage that arises is greatly influenced by the natural environment and the conductor cables, which are usually in long spans and unprotected. For this reason, noise minimization is very needed. This study aims to compare several types of conductors in reducing noise and reducing attenuation. The study was conducted in an open field with a 20-meter cable, and the front-end amplifier was varied to get the highest SNR.