Application of the Sato Blind Deconvolution Algorithm for Correction of the Gravimeter Signal Distortion

Abstract

Strong damping and large time constant is the common characteristics of marine gravity meter, in which they suppress vertical interference in the direction of the acceleration, but also result in distortion of the low-frequent gravity anomaly signals, such as amplitude attenuation and phase lag. Based on the principle of the gravimeter and the distortion of measured signals, measured distortion signals of the gravimeter can be approximately taken as the result of gravity signal convoluted with the unknown coefficients of the low-pass filter. Then, the single-channel Buss gang method based on the Sato algorithm is analyzed and used to correct the gravity anomaly distortion signal. Theoretical analysis and the result of emulations show that the correction algorithm based on the blind deconvolution can effectively eliminate the amplitude attenuation and phase lag of the gravity signal distortion and improve the accuracy of the gravity anomaly.