National Institute for Polar Research

continuous observation of narrow band radio transmitter signals in the very low frequency (VLF) and low frequency (LF) ranges. It detects ionization phenomena in the lower ionosphere. The ionization is caused by precipitations of high energy electrons from space.

continuous

continuous

continuous

every hour

every hour

Continuous

Continuous

Continuous

Continuous

Continuous

Continuous

During rain period

continuous

continuous

continuous