The present paper Prerrpb the leastt square method for calcdating fijiecoefficient of symmetrical quadiupole electrical sounding,with the forward filtercoefficientS given when two sets of ecentrlclty(MN/AB) are and I/Srespectively. Sampling Intervals are 0.6.IN all, there are 15 coefficients In theformer case and 13 coefficients In the latter case.The precision of the filterand the necessity of taking into account the polar distance for measllrelncnt arealso dealt wvth in this paper.
[1] Ghosh D. P.: 1971, The application of Linear filter theory to the direct interpretation of geoelcctrical resistivity sounding measurements, Geophysical Prospecting, Vol. 19, No. 2.
[2] Ghosh D.P.:1971,1nverse filters coefficients for the computation of apparent resistivity standard curves for a horizontally stratified earth, Geophysical Prospecting, Vol. 19, No. 4.
[3] O'Neill D. J. and Merrick N. P.:1984, A digital linear filter for resistivity sounding with a generalized electrode array, Gcrophysica (Prospecting, Vol. 32, No. 1.
[4] Koefoed O.:1979, Geosounding Principles, 1: resistivity sounding measurements, Elsevier Scientific Company.
[5] Koefoed O. and Dirks P. J. H.: 1979, Determination of resistivity sounding filters by the Wiener-IIopf least-squares method, Geophysical Prospecting, Vol. 27, No. 1.
[6] Guptasarma D.:1982, Optimization of short digita linear filters for increased accuracy,Geophysical Prospecting, Vol. 30, No. 4.