地震计位置校正
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摘要
地震计与授时和定位用的GPS天线的分离,造成地震计位置的误差,这种现象在地震计置于山洞的地震台中是普遍存在的,对于井下地震计来说,在高度上也有300m左右的误差。结合邯郸台网的具体情况,分析了台站地震计位置普遍存在误差的现象,给出一种简单的校正方法,并对涉县台地震计位置进行校正,最后讨论地震计位置的偏差对地震定位的影响。
The separation of seismometer and GPS antenna for timing and positioning leads to position error of seismometer,which is a very widespread phenomenon in the seismic station with seismometers located in caves.For underground seismometers,there is also 300 meters error in height.In this paper,the widespread phenomenon of seismometer location errors is analyzed under the condition of Handan networks and a simple correction method is presented,using this method,the seismometer at Shexian seismic station is corrected.Finally,the influence of position error of seismometer to earthquake location is discussed.
The separation of seismometer and GPS antenna for timing and positioning leads to position error of seismometer,which is a very widespread phenomenon in the seismic station with seismometers located in caves.For underground seismometers,there is also 300 meters error in height.In this paper,the widespread phenomenon of seismometer location errors is analyzed under the condition of Handan networks and a simple correction method is presented,using this method,the seismometer at Shexian seismic station is corrected.Finally,the influence of position error of seismometer to earthquake location is discussed.
引文
[1]中国地震局.DB/T 16—2006地震台站建设规范:测震台站.
[2]Waldhauser F and Ellsworth W L.A double-difference earthquake location algorithm:method and application to the Northern Hayward Fault,California[J].Bul1.Seism.Soc.Am.,2000,90(6):1353-1368.
[3]杨智娴,陈运泰,郑月军,等.双差地震定位法在我国中西部地区地震精确定位中的应用[J].中国科学:地球科学,2003,33(S1):139-136.
[4]中国地震局.《中国数字测震台网技术规范》[M].北京:地震出版社,2005.
[2]Waldhauser F and Ellsworth W L.A double-difference earthquake location algorithm:method and application to the Northern Hayward Fault,California[J].Bul1.Seism.Soc.Am.,2000,90(6):1353-1368.
[3]杨智娴,陈运泰,郑月军,等.双差地震定位法在我国中西部地区地震精确定位中的应用[J].中国科学:地球科学,2003,33(S1):139-136.
[4]中国地震局.《中国数字测震台网技术规范》[M].北京:地震出版社,2005.
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