| 2014-09-20 10:58:41 |
At Aragats research station of Yerevan Physics institute started observations of radio frequency emission from atmospheric electrical discharges
Our planet Earth is source of wideband electromagnetic radiation
and, as was established recently, particle beams. To understand origin of these
radiation, having enormous impact on climate and “global change” we need to
measure as much as possible parameters of radiation and correlate them with
thunderstorms and space storms. Cosmic ray division
of the Yerevan Physics institute with its Aragats space environmental center
launched a endeavor of installing in Armenia and worldwide networks of particle
detectors, field meters, lightning detectors, now enlarged by monitoring of the
radio emissions.
The high frequency (HF) detector, installed in
September 2014 at Aragats and in Yerevan is a active outdoor whip antenna
(MFJ-1024) that covers 50 KHz to 30 MHz frequency range, a digital oscilloscope
(Picoscope 3206) with maximum sampling rate of 200MS/s, and an on-line PC. The
apparatus allows to record the waveform of HF radio emission with temporal
resolution of 5ns, repetition rate of 1 Hz, and data capture length of 5 ms.
The radio measurements are compared with the time series of the near-surface
electric field disturbances (measured with Boltek EFM-100 field mill), and with
the time series of occurrences of lightning (detected with Boltek Storm Tracker
Lightning Detector). Correlations between radio frequency detected events and
data of the two Boltek devices are presented.
