Method for identifying types of underground superficial heteroplasmon based on surface spectrum disturbance characteristics

The invention discloses a method for identifying the category of an underground shallow heteroplasmon based on surface spectrum disturbance characteristics, which comprises the following steps: arranging a reference measuring line near a heteroplasmon suspicious region, performing two-dimensional Fourier transform on a test signal to obtain a frequency-wave number domain spectrum, and obtaining an average phase velocity through a spectrum ridge line; then, performing one-dimensional Fourier transform on a test signal of a test point to obtain an offset-frequency domain spectrum cloud picture, and converting the offset-frequency domain spectrum cloud picture into an offset-wavelength domain spectrum cloud picture as a reference spectrum cloud picture according to an average phase velocity; setting a test line in a suspicious area to obtain a test spectrum cloud picture, comparing the test spectrum cloud picture with a reference spectrum cloud picture, spectrum cloud picture characteristics disturb correspondin