ИСТИНА

During many years there was an ionospheric station in the Geophysical Observatory Loparskaya (LOP,68.25N, 33.08E; Ф = 64.52N, 113.9E; L = 5.2). A photographical method was used and it was decided to adapt an ionospheric complex “Bazis” as a modern vertical ionosonde. The main problem was to replace the old system of information sampling by using modern hardware and to create new software. It has been done and we have now a digital ionospheric station of a vertical sounding with modern software and hardware. The range of working frequencies is 0.3-39.999 MHz. The sounding frequency changes automatically with a discrete step chosen beforehand: 1, 5, 10, 20, 25, 50, 100 kHz. A working cycle of sounding includes 400 successive frequencies which change with a chosen step. Duration of pulses is in the range 25- 800 mks, a repetition frequency can be chosen in the range of 1-50 Hz. Pulse power is about15 kW.