Amelioration du rapport signal / bruit a l'aide du filtrage en eventail. Etude d'un cas concret
J. P. Fail, G. Grau and P. C. Layotte
Journal name: Geophysical Prospecting
Issue: Vol 12, No 3, September 1964 pp. 258 - 282
Info: Article, PDF ( 2.59Mb )
Case history of the use of fan filtering for improving reflection continuity without destroying their character. The field technique is described: wide-band, large dynamical range recording with a programmed gain control and a very slow A.G.C., small distance between trace centers, high cutoff wave-number.
Although the total amount of mixing due to fan filtering is rather high, a broad spectrum was obtained and inverse convolution filtering was used to improve trace resolution.