METHOD FOR DETERMINING DISTANCE TO EARTH SURFACE Russian patent published in 2021 - IPC G01S13/32 

FIELD: radar tech.

SUBSTANCE: invention relates to the field of radar technology and can be used in the construction of various radar systems designed to determine the distance from a moving object to the earth's surface, using the principle of reflection of radio waves. The method consists in emitting probing signals in the direction of the earth's surface, using radio pulses as probing signals, consisting of N monochromatic subpulses, with non-periodic phase-code intra-pulse manipulation, which is implemented by modulating M-sequences of the initial phases of subpulses, tuning the carrier frequency of radio pulses from a radio pulse to a radio pulse according to a random equiprobable law in each repetition period and the change from a radio pulse to a radio pulse of the repetition period of radio pulses, the duration of radio pulses and the number of monochromatic subpulses, the reception of signals reflected from the earth's surface, the matched filtering of the reflected signals using the codes that form the modulating M-sequences as weighting coefficients, and determining the distance to the earth's surface; the repetition period is synchronized with the moments of radiation of radio pulses with a duration consisting of N monochromates physical subpulses.

EFFECT: increased accuracy of determining the distance to the earth's surface.

1 cl