Hourly-scaled ionospheric data from Vernadsky station

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 ASCII format. Additional information can be found at http://www.uac.gov.ua