Accession Number : AD0703345

Title :   ORTHOGONAL DECOMPOSITION AND SEISMIC ARRAYS.

Descriptive Note : Final rept. 24 Apr 68-30 Jul 69,

Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Kane,Julius ; Andrews,Harry ; Pratt,William

Report Date : 20 NOV 1969

Pagination or Media Count : 40

Abstract : Non-trigonometric orthogonal systems were investigated with particular regard to seismic applications and computer implementation. Most emphasis was given to systems of functions which assume only the binary values +1 and -1, and in particular, the Walsh functions. Algorithms for their efficient machine generation were devised and applied to the problem of data reduction. Compression rations of 6:1 are easily obtained, and much higher ratios are possible with more refined techniques (error-correcting codes, etc). Applications are given to block quantized data. (Author)

Descriptors :   (*SEISMIC WAVES, DATA PROCESSING), PHASED ARRAYS, SEISMOMETERS, FOURIER ANALYSIS, DIGITAL COMPUTERS, COMPUTER PROGRAMMING, ALGORITHMS

Subject Categories : Seismology
      Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE