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Method for seismic exploration

  • US 4,675,851 A
  • Filed: 09/09/1982
  • Issued: 06/23/1987
  • Est. Priority Date: 09/09/1982
  • Status: Expired due to Term
First Claim
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1. The method of forming a plurality of sweeps of signals based upon a predetermined set of n distinct signals, n+1 being a prime number, so that cross correlation of any two sweeps from said plurality is minimized, comprising the steps of:

  • (a) forming a first sweep by ordering the set of n signals in a selected first order;

    (b) designating the position of occurrence of each of said signals in said first sweep successively by the successive integers from one to n forming a first set of integers;

    (c) generating a second set of n integers beginning with the number two and followed by integers successively formed by adding the number two to each preceding integer;

    (d) modifying said second set of integers by subtracting n+1 from any such integer which exceeds n; and

    (e) forming a second sweep by ordering the occurrence of the set of n signals in a second order in accordance with the modified second set of integers.

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