Historically, 3D land data has been noisy when compared to 3D marine data. Recently we have witnessed the advent of high density 3D land recordings with folds in excess of 400 that help to reduce noise on the final images. There are many surveys where gathers for such high fold data are so noisy to allow any prestack work. Furthermore noisy, low fold, mostly old vintage 3D data is still a common occurrence on interpreter's desk. To enhance signal on such noisy gathers as well as on their stacks is the task that this paper aims to address.


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