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The increasing demand for electricity has led humans to a growing exposure to artificial sources of electromagnetic emission, making it essential to determine the intensity of electromagnetic fields (EMFs), which is subject to the population of a given area. This Letter proposes an analysis of EMF exposure levels and spatial distribution over the region of the input and power circuits of a 230 kV/60 Hz air-insulated substation. For this, measurement protocols were determined based on current standards and from spatial interpolation methods, a contour map was developed, allowing a complete evaluation of the behaviour and levels of EMF throughout the region. The results obtained indicate that exposure levels in this region are below those recommended by regulatory agencies. [ABSTRACT FROM AUTHOR]

The advancement of embedded technologies has led to increasing demand for bandwidth in telecommunications solutions, this increased the researches related to the architecture of wireless networks and applied electromagnetism. In view of this, the digital transceiver radios need an adequate received signal strength indicator to enable the traffic of information by the radio propagation channel and to provide quality in the data network for the users to exercise the operational activities. The objective of this Letter is to perform the exploratory and variographic analysis of the data collected in the oil fields. Hence, evaluate the behaviour of the surface power distribution received from a wireless system in the frequency range of 5.8 GHz located in the well-automation region called Canto do Amaro, Brazil, where there are frequent communications failures for mobile stations. With the data measured in the measurement campaigns, variogram models were constructed and compared for the construction of interpolation matrices and contour maps, with these results the precision criteria of the kriging methods employed in the study region were established. [ABSTRACT FROM AUTHOR]