Authors:F. Märcz, J. Horváth, P. Bencze and et al.
In addition to the original equipment, a new measuring set has been constructed for observing the atmospheric electric potential gradient (PG) at Nagycenk station. The study describes this new set and reports on PG variations derived from data obtained by the two simultaneous measurements. Both runs of the mean diurnal variations determined on the basis of the two data sets are quite similar, as well as they resemble the appropriate diurnal variation derived from earlier Nagycenk data, or fairly the `Carnegie Curve'. Nevertheless, the measured PG level is somewhat higher in the case of the new equipment (PG 2) than that measured with the original set (PG 1). This is also true in the case of single days diurnal variations, however, the daily runs derived from the individual measurements are hardly different. Whichever of the two data sets is applied, the PG's seasonal (annual) variation shows a distinct maximum in winter, even if this maximum is again higher for PG 2 than that for PG 1. Certain ideas on this behaviour are also suggested by the study