Methods for processing sonic logging data obtained from a logging tool having an array of R receivers, includes selecting a sub-array size of Rsb receivers where Rsb<R; calculating the number of sub-arrays Nsb possible from the array of R receivers; identifying one receiver Rref in the array to serve...http://www.google.de/patents/US6459993?utm_source=gb-gplus-sharePatent US6459993 - Processing sonic waveform measurements from array borehole logging tools
