Análise do efeito corona gerado por redes elétricas de alta tensão sobre o posicionamento relativo com GNSS

The purpose of this work was to investigate the possibility of errors in positioning caused by the multipath coming from the corona noise, generated in high-voltage electric lines, in GNSS signals reception. Experiments were performed near a 69 kV tension electric line where it was established a series of eleven transverse points to the longitudinal alignment of the transmission line and accomplished evaluations of positioning interference in the static relative method with a dual frequency GNSS receiver. To evaluate the interference in the coordinates estimation it was necessary to obtain the geodetic coordinates of these points without the possibility of multipath by corona noise. For this, it was established a square topographical polygonal whose support stations was 130 meters far from the transmission line. Performed the statistical analysis it was concluded that for the methods of mapping and the geodetic equipment used in this experiment, in a 69 kV transmission line, the discrepancies found were within the standard deviation.