Abstract:
The results of taking soundings of ionosphere on the routes Ioshcar-Ola-Balti, Dushanbe-Balti, and Habarovsk- Balti with linear-frequency-modulated signals are presented. Irradiation with power 200 W and reception of signals were carried out in the frequency band 1...30 MHz by frequency change speed djldt = 483.3 kHz's. Dependences of maximum and minimum magnitudes of observed frequencies on time for 1F2, 2F2, and 3F2 modes, dependences of one-mode propagation regime bands on time, and dependences of intensity of received signal on frequency and time are obtained.