GPS授时地震仪走时误差校正

基金项目:

国家科技重大专项课题(2011ZX05040-002)

国家科技支撑计划课题(2012BAK04B04)

详细信息

Correction of travel time error of seismograph with GPS clock

Xi'an Research Institute, China Coal Technology and Engineering Group Corp, Xi'an 710077, China

摘要: 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
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.
- Akima interpolation /
- seismograph with GPS clock /
- crystal oscillator /
- time correction