The invention relates to a geophysical surveying method, in particular to a directional lighting seismic
signal synthetic method which is based on a single seismic source in the seismic
prospecting.
Equidistant shotpoints with the odd number of more than one to n are designed on a surveying line; at the same time,
equidistant track space demodulator probes with the number of more than one to N are arranged on the surveying line; the
single shot seismic data of the shotpoint 1 are obtained through a controlled seismic source, the
single shot seismic data of the shotpoint 2 are obtained by moving the shotpoints, the
single shot seismic data of the shotpoint 3 are obtained by moving the shotpoints, and then the single shot seismic data of the shotpoints with the number of n are obtained by analogy; the single shot seismic data are made linear superposition after being delayed, and are synthesized into the directional lighting seismic signals with
directivity, which correspond to a positioning
seismic wave field. By comparing the directional lighting seismic
signal synthetic method which is based on a single epicenter with the
phase control seismic signals, the
noise-
signal ratio of the signals is improved, the needed number of seismic sources is few, the working cost is low, the operation is simple, and the problem of the inconsistency of a plurality of shock devices is overcome.