文章对双差地震定位法的原理及其主要程序进行了简要的介绍，并对该方法在实际应用中的一些特点和需注意的问题进行了讨论。
The principle and key programs of the Double Difference Algorithm have been briefly introduced in the paper and with the problems in applying the technique to relocate earthquake discussed.
同时，姚安、大姚地震序列的重定位结果也说明双差定位法是一种比较好的地震定位方法。
In addition, the relocation results of the Dayao and Yaoan Earthquake sequences also show that the double difference location method is more effective.
同时，姚安、大姚地震序列的重定位结果也说明双差定位法是一种比较好的地震定位方法。
In addition, the relocation results of the Dayao and Yaoan Earthquake sequences also show that the double difference location method is more effective.
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