Community Workshop: The future of PBO in the GAGE Facility (2013-2018) and after EarthScope

mattioli1441122这笔拨款将支持2014年初秋在科罗拉多州举行的为期三天的重点研讨会。研讨会的目的是将各利益相关方聚集在一起，讨论美国板块边界观测站（PBO）大陆尺度大地测量网的未来。PBO由大约1100个连续运行的全球定位系统接收器组成，这些接收器安装在美国各地，但在美国西部靠近北美板块活动板块边缘的地方密度有所增加。在这里，地壳变形率很高，地震集中在圣安德烈亚斯和相关的转换断层上。太平洋西北部近海和阿拉斯加南部海洋地壳俯冲到北美板块之下，导致喀斯喀特山脉和阿留申群岛的火山活动活跃，在历史记录中记录了大型海啸性地震。PBO还包括其他大地测量传感方式，包括钻孔应变仪（BSM）和地震仪，长基线激光应变仪（LSM），倾斜仪和地面气象测量。在1100个GPS站点中，约有400个站点以高频率（1hz）记录大地测量数据，并实时传输数据。所有PBO数据和数据产品都集中保存在联合国维和行动组织有限公司（www.unavco.org），并可通过互联网免费获取。PBO数据产品用于解决北美范围内广泛的科学和技术问题。一个大型的美国和国际测量师和土木工程师社区每天访问PBO数据流、软件和其他在线资源。超过95%的PBO传感器资产位于美国西部和阿拉斯加，这些地区已经经历并将继续经历地震、火山爆发和海啸等重大且具有潜在破坏性的地球物理事件。PBO促进的科学提供了地球物理过程的一级约束，以支持灾害绘图和分区以及目前正在开发的地震预警应用。根据一项新的NSF-UNAVCO， Inc.的五年合作协议，PBO以及通过GPS进行精确定位并支持卫星和航天器轨道定位的全球分布式大地测量基础设施，现在作为所谓的GAGE设施（大地测量推进地球科学和地球范围）的一部分进行管理。2013财年，预算挑战导致NSF从2012财年及之前财年的运营成本中直接削减了基准GAGE支持。因此，研讨会将寻求确定重新基线化的长期影响，以及科学和其他优先事项将如何帮助确定PBO的哪些组成部分，特别是在GAGE五年期合作协议（2013-2018）期间在不久的将来有被终止的风险。研讨会将支持一些具有广泛科学兴趣的科学和技术领袖的会议，来自商业部门的代表，他们要么拥有基于免费和开放获取板块边界天文台（PBO）大地测量设施数据和数据产品的当前产品或商业模式，要么可能有兴趣在未来开发基于PBO资产和流的新业务或产品。以及相关的联邦和州机构代表。研讨会将产生一份报告和网络资源，其中包含社区审查的建议。＊＊＊

Mattioli1441122This grant will support a focused three day workshop in Colorado in early fall 2014. The purpose of the workshop is to bring together various stakeholders to discuss the future of the Plate Boundary Observatory (PBO) continental scale geodetic network in the U.S. PBO consists of approximately 1100 continuously operating Global Positioning System receivers installed across the U.S. but with increased density in the Western U.S. near the active plate margin of the North American plate. Here, crustal deformation rates are high and earthquakes are concentrated along the San Andreas and associated transform faults. Offshore the Pacific Northwest and southern Alaska ocean crust is subducted beneath the North American plate leading to active volcanic processes in the Cascades and Aleutians and where large tsunamigenic earthquakes have been recorded in the historical record. PBO also includes other geodetic sensing modalities including borehole strainmeters (BSM) and seismometers, long baseline laser strain meters (LSM), tiltmeters and surface meteorological measurements. Geodetic observations are recorded at a range of frequencies and some 400 of the 1100 GPS stations record at high rates (1 Hz) and transmit data in real time. All PBO data and data products are archived centrally UNAVCO, Inc. (www.unavco.org) and are freely available via internet web access. PBO data products are used to address a wide range of scientific and technical issues across North America. A large US and international community of surveyors and civil engineers access PBO data streams, software, and other on-line resources daily. The western US and Alaska, where over 95% of the PBO sensor assets are located, have experienced and will continue to experience significant and potentially damaging geophysical events like earthquakes, volcanic eruptions, and tsunamis. The science facilitated by PBO provides first-order constraints on geophysical processes to support hazards mapping and zoning and for earthquake early warning applications currently under development. Under a new NSF-UNAVCO, Inc. five-year Cooperative Agreement, PBO along with globally distributed geodetic infrastructure used for precise positioning via GPS and to support satellite and spacecraft orbital positioning, are now managed as part of the so-called GAGE facility (Geodesy Advancing Geosciences and EarthScope). In FY 2013, budget challenges led to a directed cut to the baseline GAGE support from NSF from operational costs incurred in FY 2012 and previous. Thus, the workshop will seek to identify the longer term ramifications of that rebaselining and how scientific and other priorities will help define what components of PBO, in particular, are at risk of being terminated in the near future under the period of the GAGE five year Cooperative Agreement (2013-2018). The workshop will support a meeting of a number of scientific and technical leaders with a wide variety of scientific interests, representatives from the commercial sector who either have current products or business models based on free and open access to the Plate Boundary Observatory (PBO) geodetic facility data and data products, or who may have an interest in developing new business or products based on PBO assets and streams in the future, and relevant federal and state agency representatives. The workshop will result in a report and web resources encapsulating community-vetted recommendations. ***