OBSERVATION AND PLAYBACK SYSTEM FOR DEEP SEISMIC SOUNDING

The establishment of Data Processing System for Deep Seismic Sounding is for the automatization and standardizaticjn of data processing from observation through interpretation of record sections by computer hardware and software. The present paper presents the results of the first stage of th's project which will be fallowed by two more researches of pre-processing of record section and interpretation of the profile.Considering the present computer facilities in China, analogue records of time and seismic signals are first passed through a demodulator unit and converted to digital with PSformat by computer PS-600. After code reassemble a new magnetic tape with standard CGGformat can be generated and all (basic parameters about the receivers are written on the header and data block of the tape. Such kind of code format is more easily utilized in different computers. The precision of time determination for a full-hour on the record is about 5—10 ms. Bobbins formula is applied to precisely determine the distance and azimuth between shot point and receiver. The program plotting record seetilon is off easy operation and suitable for multi-purpose applications.This system has been utilized in practice with good results.