Acquisition of a Pool of Highly Portable Seismic Recorders for Use by the Seismological Community

9871161 Keller这笔赠款通过重大研究仪器(MRI)计划与地球科学仪器和设施计划的资金相结合，为购买400台轻型便携式地震仪、相关的地震检波器、运输箱、野外计算机、GPS时钟和频率计数器提供部分支持，用于进行旨在对地球大陆岩石圈结构进行层析成像的有源地震实验。德克萨斯大学埃尔帕索分校(UTEP)将购买的仪器是由一家名为折射技术(RefTek)的私营公司与UTEP、莱斯大学和德克萨斯大学达拉斯分校的人员合作开发的。结果是RefTek-125，重2-3磅。一种使用2节D电池最长可工作两天的仪器，带有板载存储器，能够以2毫秒的间隔连续记录12小时，或以8毫秒的间隔连续记录48小时。它们是主要适用于高频有源地震实验的单通道仪器。RefTek-125的重量极大地降低了运输成本，允许现场部署更多的仪器，并且比旧的IRIS-大陆岩石圈阵列地震研究计划(PASSCAL)社区可访问仪器池在经济或后勤上可行的更偏远的地点。对于高分辨率浅层地下成像，这些仪器还将允许非常密集(大约1-10米间隔)的3-D调查阵列部署，只需一辆野外车辆就可以可行地进行，而且成本相对较低。作为对IRIS未来运行和管理支持的回报，RefTek-125仪器池最终将通过IRIS-PASSCAL计划提供给更广泛的地震界。

9871161KellerThis grant, made through the Major Research Instrumentation (MRI) Program, in combination with funds from the Earth Sciences Instrumentation and Facilities Program, provides partial support for the acquisition of a pool of 400 lightweight portable seismographs, associated geophones, shipping cases, field computers, GPS clocks, and frequency counters for active source seismic experiments aimed at tomographically imaging the structure of the Earth's continental lithosphere. The instruments to be acquired by the University of Texas at El Paso (UTEP) were developed by a private company, Refraction Technologies (RefTek), in collaboration with personnel from UTEP, Rice University and the University of Texas at Dallas. The result has been the RefTek-125, a 2-3 lb. Instrument that operates on 2 D-cell batteries for up to two days with on board memory capable of 12 hours of continuous recording at 2 ms intervals or 48 hours at 8 ms. They are single channel instruments which are primarily suited for high frequency active source seismic experiments. The lightweight of the RefTek-125 significantly reduces shipping costs, allowing field deployment of greater numbers of instruments and to more remote locations than have been economically or logistically feasible with the older IRIS-Program for Array Seismic Studies of the Continental Lithosphere (PASSCAL) pool of community accessible instruments. For high-resolution shallow subsurface imaging, these instruments will also allow very dense (ca. 1-10 m separations) array deployments for 3-D investigations that can feasibly be carried out with only a single field vehicle and for relatively low cost. In return for future operational and management support from IRIS, the RefTek-125 pool of instruments will ultimately be available to the broader seismological community through the IRIS-PASSCAL program.***