国家数字地震台站

我国九五期间陆续建成了48个国家数字地震台站，记录了丰富的数字地震波形资料。

48 seismograph stations were built gradually during the " 9th Five-year Plan " and a great deal of digital seismic data has been recorded .

在研究结果中，根据噪声功率谱的全频段平均值，把37个国家数字地震台站的台基质量分为三类，在文中给出了分类结果和相应的地动噪声曲线图。

As a result , we classify these stations into three grades by comparing the average of noise power spectrum in whole-band range and present the resultant figures in this paper .

这对于正确快速地获取地震仪的传递函数具有重要的现实意义，有利于国家数字地震台站和区域地震台站地震观测系统的定期标定工作，同时也将促进数字化地震观测资料的应用研究。

These are significant for quickly acquiring transferring function of digital seismograph , beneficial to the routine calibration of state digital seismic stations and regional seismic stations at regular interval , and can also promote the application of digital seismic seismograms .

国家数字地震台网台站地动噪声功率谱分析

The power spectrum analysis of earth motion noise at the stations of National Digital Seismic Network