Equipment for Automatic, High-Speed Digitization of Data from the Carnegie-DTM Broadband Seismic Network

该项目将导致建立一个自动数字回放系统，用于从卡内基研究所17年的模拟数据磁带中检索事件数据。SEVEN仪器网络产生宽频带(0.008至30赫兹)、高动态范围(160db)的地震事件记录。模拟磁带的自动数字化将需要：(1)具有超低噪声电子设备的机械回放系统，以及(2)具有足够实时响应的高速工作站，以每秒一百万个样本的速度数字化和获取数据。播放系统的硬件和软件的实施将在六个月内完成，磁带库的数字化将需要额外一年的时间。完成后，这一档案将成为现有最大的数字宽带地震数据来源，并将成为地震界研究地球内部结构的宝贵资源。

This project will result in the construction of an automatic digital playback system for retrieving event data from 17 years of analog data tapes from the Carnegie Institution.Department of Terrestrial Magnetism broad.band seismometer network. The seven instrument network produces broad.band (0.008 to 30 Hz), high.dynamic range (160 db) recordings of seismic events. Automatic digitization of the analog tapes will require: (1) a mechanical playback system with ultra low-noise electronics, and (2) a high-speed workstation with real-time response sufficient to digitize and acquire data at a rate of a million samples per second. Hardware and software implementation of the playback system will be accomplished in six months, and digitization of the tape library will take an additional year. When completed, this archive will represent the largest source of digital broad-band seismic data available and will be a valuable resource for the seismological community in its studies of the interior structure of the Earth.