R-T component calculation method and device for OBS seismic data

The invention relates to the technical field of R-T component calculation of OBS seismic data, and provides an R-T component calculation method and device of OBS seismic data. The method comprises the following steps: acquiring a plurality of pieces of seismic trace data, wherein each piece of seismic trace data comprises a first arrival signal; projecting the amplitude polarity of the first arrival signal to a target coordinate system, and calculating the horizontal component azimuth angle of the target OBS; calculating a polarization angle based on the projection coordinate of the first arrival signal and the horizontal component azimuth angle of the OBS; and rotating an X-Y component in the horizontal component of the seismic trace data of the corresponding seismic trace to an R-T direction based on the polarization angle to obtain R-T components of the seismic trace data of the plurality of seismic traces. According to the embodiment of the invention, the polarization angle can be accurately obtained, and