| 摘要 |
<p>A method of seismic exploration (140), using conversions between electromagnetic (144), and seismic energy (147), with particular attention to the electromagnetic source wave form used. According to the invention, source waveforms are correlated with reference waveforms selected to minimize correlation side lobes. Line power at 60 cycles may be used to provide a wave form element which is sequenced by a binary code to generate (141) an extended source wave form, segment with minimal correlation side lobes. Preferred binary codes include Golay Complementary Pairs, and maximal length shift register sequences.</p> |
