MTA CSFK Geodéziai és Geofizikai Intézet

Measurements

Measurements and reports started in 1957 (International Geophysical Year) with earth current data. The potential differences are measured in N-S and E-W directions with electrode spacings of 500 m. Low polarization lead plate electrodes are buried about 2 m below the surface. Potential differences are recorded with 1 sec and 10 sec sampling rate.

Continuous observation of atmospheric electricity started in 1962. Slow variation (DC component of vertical atmospheric electric field) is measured between the ground and an electrode (at 1 m height) around which the potential is equalized by means of a radioactive collector. Potential gradient is recorded with 15 sec sampling rate.

The registration of geomagnetic elements with control of the absolute observations began in 1961. The observatory has belonged to the INTERMAGNET co-operation since 1993. Data are transmitted via METEOSAT satellite and computer network to geomagnetic information nodes and made also available to the international research community on CD ROM.

The observatory is the northernmost station of the South European Ground Magnetometer Array (SEGMA). The SEGMA stations in Austria, in Hungary and in Italy are located between L = 1.56 and L = 1.88. All of them are equipped with high resolution CHIMAG magnetometer. The magnetic field vector is recorded with a nominal sampling rate of 16 Hz but on special occasions the station has the maximum sampling rates up to 64 Hz.

The early nineties are to be considered as a transition period in the observatory again. Schumann resonance measurements started in 1993, an ionosonde station type IPS 42 works since 1996, the new digital ionosonde (type VISRC-2 made by the Space Research Center of the Polish Academy of Sciences) is to be put in operation in 2007. A scientific meteorological station was installed in 1996. ELFVLF (whistler) observations is going on since 2003. The meteorological station is based on a Campbell CR10X measurement and control modul, temperature, humidity, wind speed, wind direction, rainfall and radiation sensors.