GPS授时地震仪走时误差校正-煤田地质与勘探.PDF

第43 卷 第3 期 煤田地质与勘探 Vol. 43 No.3 2015 年6 月 COAL GEOLOGY EXPLORATION Jun. 2015 文章编号: 1001-1986(2015)03-0091-04 GPS 授时地震仪走时误差校正 王云宏，江 浩，王 盼，吴 海 ( 中煤科工集团西安研究院有限公司，陕西 西安 710077) : 受制造成本和工艺的限制，GPS 授时地震仪中的守时晶振不可避免地会有频率误差，继而 在数据采集过程中，随着采集时间的增加，各台站之间会出现采集不同步现象。介绍了Akima 分 段多项式插值重采样方法及其在GPS 授时地震仪时间校正中的应用。通过对理论数据与实际数据 的Akima 插值重采样试验表明，Akima 插值重采样方法可应用于GPS 授时地震仪走时误差校正， 是一种简便、高效、保形性好的插值重采样方法。 ：Akima 插值；GPS 授时地震仪；晶振；时间校正 ：P631 ：A DOI: 10.3969/j.issn.1001-1986.2015.03.018 Correction of travel time error of seismograph with GPS clock WANG Yunhong, JIANG Hao, WANG Pan, WU Hai (Xi ′an Research Institute, China Coal Technology and Engineering Group Corp, Xi ′an 710077, China) Abstract: Because of constraints of manufacturing costs and process, timing crystal in seismograph with GPS clock has inevitably frequency error. So, in the process of data acquisition, with the increase in acquisition time, non-synchronous phenomenon occurs between acquisition stations. The paper describes the Akima piecewise polynomial interpolation resampling method and its application in time correction of seismograph GPS clock. Akima interpolation by theoretical data and actual data resampling test showed that Akima interpolation resampling method can be applied to travel time error correction of seismograph with GPS time, is a simple, efficient, good shape retention interpolation resampling method. Key words: Akima interpolation; seismograph with GPS clock; crystal oscillator; time correction GPS [1-2] GPS a. GPS