Abstract: OBC(Ocean Bottom Cable) records are often limited by the limitations of data collection techniques and the environment, leading to a large amount of random noise that negatively impacts the identification of effective reflection information. Suppressing random noise requires accurate analysis of noise characteristics, therefore the multichannel method and a stability test method based on the energy distribution of the sequence are used to analyze the power spectral characteristics and stability of OBC random noise. Real noise data collected in a certain location in the South China Sea is used as the analysis dataset. The results show that OBC random noise is a colored noise sequence with noise energy mainly concentrated in the low-frequency part. The OBC noise is a weak non-stationary time sequence, and the conclusion is reasonable by combining the characteristics of the ocean exploration environment. This study has a certain practical significance and application prospects for the basic research on OBC random noise characteristics. 

Key words:  ')">

 , ocean bottom cable ( OBC ), random noise, stationarity, power spectrum characteristic, energy distribution