Polarization of Radio Pulses from Extensive Air Showers

We have used log-periodic, EW- and NS-arm antennas to investigate whether radio pulses from extensive air showers are polarized perpendicularly to the earth's magnetic field. Up to three such pairs of antennas were operated simultaneously, and 32 events with 84 radio pulses were observed. In the polarization part of the experiment, there were 23 pulses recorded in EW antennas versus 7 in NS, suggesting some geomagnetic production of radio pulses.