Ionosphere sounding is carried out using the semi-automatic station ISP-42.
This is a radar system for impulse radio sounding of the ionosphere in the
height interval up to 800 km at frequencies 1.0-22.6 MHz. The impulses are
emitted every 15 minutes during the 20-second interval. Ionograms are processed
using the URSI technology and hourly averaged resulting raw data are stored in
Additional information can be found at http://www.uac.gov.ua/index2.php?science/sciens_ion_e.htm