Method of filtering seismic signals

Claim 1

A METHOD OF FILTERING SEISMIC SIGNALS IN THE TIME DOMAIN UTILIZING A SEISMIC SYSTEM DESIGNED FOR SUBSURFACE EXPLORATION INCLUDING AN IMPULSIVE ENERGY SOURCE COUPLED TO THE GROUND FOR INJECTING COMPRESSIONAL WAVE ENERGY INTO THE GROUND IN REPEATABLE, ESSENTIALLY EQUAL AMOUNTS HAVING MEANS FOR DELAYING AT WILL THE MOMENT OF INJECTION OF SAID ENERGY WITH RESPECT TO A FIXED TIME ORIGING BY A DESIRED AMOUNT, A GROUND-COUPLED RECEIVING SYSTEM FOR RECEIVING THE SEISMIC WAVES PRODUCED BY SAID SOURCE AFTER THE WAVES HAVE UNDERGONE REFLECTION BY BEDS IN THE SUB SURFACE, AND MEANS FOR RECORDING SIGNALS REPRESENTATIVE OF SAID SEISMIC WAVES, COMPRISING; (A) SEPARATELY INJECTING INTO THE GROUND FROM SAID SOURCE A FIRST SET OF A FIRST PREDETERMINED NUMBER OF SEPARATE ESSENTIALLY EQUAL AND SIMILAR COMPRESSIONAL WAVES, THE MOMENT OF INJECTION OF EACH SEPARATE WAVE OF SAID FIRST SET OCCURING AT A FIXED TIME BASE; (B) DETECTING WITH SAID RECEIVING SYSTEM A FIRST SET OF SEISMIC WAVES PRODUCED BY THE FIRST SET OF COMPRESSIONAL WAVES; (C) RECORDING THE DETECTED FIRST SET OF SEISMIC WAVES TO PROVIDE A FIRST SET OF RECORDED SIGNALS HAVING A FIXED TIME BASE;

Claim 2

A METHOD OF FILTERING SEISMIC SIGNALS IN THE TIME DOMAIN UTILIZING A SEISMIC SYSTEM DESIGNED FOR SUBSURFACE EXPLORATION INCLUDING AN IMPULSIVE ENERGY SOURCE COUPLED TO THE GROUND FOR INJECTING COMPRESSIONAL WAVE ENERGY INTO THE GROUND IN REPEATABLE, ESSENTIALLY EQUAL AMOUNTS HAVING MEANS FOR DELAYING AT WILL THE MOMENT OF INJECTION OF SAID ENERGY WITH RESPECT TO A FIXED TIME ORIGING BY A DESIRED AMOUNT, A GROUND-COUPLED RECEIVING SYSTEM FOR RECEIVING THE SEISMIC WAVES PRODUCED BY SAID SOURCE AFTER THE WAVES HAVE UNDERGONE REFLECTION BY BEDS IN THE SUB SURFACE, AND MEANS FOR RECORDING SIGNALS REPRESENTATIVE OF SAID SEISMIC WAVES, COMPRISING; (A) SEPARATELY INJECTING INTO THE GROUND FROM SAID SOURCE A FIRST SET OF A FIRST PREDETERMINED NUMBER OF SEPARATE ESSENTIALLY EQUAL AND SIMILAR COMPRESSIONAL WAVES, THE MOMENT OF INJECTION OF EACH SEPARATE WAVE OF SAID FIRST SET OCCURING AT A FIXED TIME BASE; (B) DETECTING WITH SAID RECEIVING SYSTEM A FIRST SET OF SEISMIC WAVES PRODUCED BY THE FIRST SET OF COMPRESSIONAL WAVES; (C) RECORDING THE DETECTED FIRST SET OF SEISMIC WAVES TO PROVIDE A FIRST SET OF RECORDED SIGNALS HAVING A FIXED TIME BASE;