dc.contributor.author | Park, Choon Byong | |
dc.contributor.author | Miller, Richard D. | |
dc.contributor.author | Steeples, Don W. | |
dc.contributor.author | Black, Ross A. | |
dc.date.accessioned | 2014-12-01T18:51:20Z | |
dc.date.available | 2014-12-01T18:51:20Z | |
dc.date.issued | 1996-11-01 | |
dc.identifier.citation | Park, Choon Byong., Miller, Richard D., Steeples, Don W., Black, Ross A. "Swept impact seismic technique (SIST)" GEOPHYSICS(1996),61(6):1789. http://dx.doi.org/10.1190/1.1444095 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/15950 | |
dc.description | This is the published version, also available here: http://dx.doi.org/10.1190/1.1444095. | en_US |
dc.description.abstract | A coded seismic technique is developed that can result in a higher signal-to-noise ratio than a conventional single-pulse method does. The technique is cost-effective and time-efficient and therefore well suited for shallow-reflection surveys where high resolution and cost-effectiveness are critical A low-power impact source transmits a few to several hundred high frequency broad-band seismic pulses during several seconds of recording time according to a deterministic coding scheme. The coding scheme consists of a time encoded impact sequence in which the rate of impact (cycles/s) changes linearly with time providing a broad range of impact rates. Impact times used during the decoding process are recorded on one channel of the seismograph. The coding concept combines the vibroseis swept-frequency and the Mini-Sosie random impact concepts. The swept-frequency concept greatly improves the suppression of correlation noise with much fewer impacts than normally used in the Mini-Sosie technique. The impact concept makes the technique simple and efficient in generating high-resolution seismic data especially in the presence of noise. The transfer function of the impact sequence simulates a low-cut filter with the cutoff frequency the same as the lowest impact rate. This property can be used to attenuate low-frequency ground-roll noise without using an analog low-cut filter or a spatial source (or receiver) array as is necessary with a conventional single-pulse method. Because of the discontinuous coding scheme, the decoding process is accomplished by a "shift-and-stacking" method that is much simpler and quicker than cross-correlation. The simplicity of the coding allows the mechanical design of the source to remain simple. Several different types of mechanical systems could be adapted to generate a linear impact sweep. In addition, the simplicity of the coding also allows the technique to be used with conventional acquisition systems, with only minor modifications. | en_US |
dc.publisher | Society of Exploration Geophysicists | en_US |
dc.title | Swept impact seismic technique (SIST) | en_US |
dc.type | Article | |
kusw.kuauthor | Steeples, Don W. | |
kusw.kuauthor | Black, Ross A. | |
kusw.kudepartment | Geology | en_US |
dc.identifier.doi | 10.1190/1.1444095 | |
dc.identifier.orcid | https://orcid.org/0000-0002-8748-6001 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item does not meet KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |