METHOD OF SYNCHRONISATION OF EQUIPMENT OF IONOSPHERE OBLIQUE SOUNDING BY MEANS OF SIGNALS WITH LINEAR FREQUENCY MODULATION Russian patent published in 2009 - IPC H04B7/02 

FIELD: physics.

SUBSTANCE: mode of the linear FM transmitter emission is carried on sliding frequency f with velocity 100 kHz/with in a narrow interval of frequencies from f_in to f_end=f_in+100 kHz, carrying out a mode of "sawtooth waveform" with a continuance of recurring LT=1s, the linear FM is attuned on the fixed frequency f_r, belonging to an interval from f_in to f_end=f_in+100 kHz with transmission band Δf=300 Hz, and the LF exit of the linear FM receiver is connected to an inlet Y of an oscillograph which scan is carried out from an exit of the second synchronometer impulses then, delay in the synchronometer corrected, considering a mismatch of time scales of the linear FM transmitter and the linear FM receiver, and calculating under the formula Δt₁=(f_r-f_in)/f temporary allowance which are entered in the synchronometer, then again emission of linear FM impulses is carried out, and the linear FM receiver is switched in a linear FM mode with a transmission band Δf=4 kHz and, correcting a delay in the synchronometer, achieving, that the radio signal hits the transmission band of the linear FM receiver.

EFFECT: cutting of time of synchromisation.

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