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

这笔赠款将支持2014年初秋在科罗拉多州举办的为期三天的专题研讨会。研讨会的目的是将不同的利益相关者聚集在一起，讨论美国板块边界观测站(PBO)大陆尺度大地测量网络的未来。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，但在北美板块活跃的板块边缘附近，美国西部的密度增加。在这里，地壳形变率很高，地震集中在圣安德烈亚斯及其相关的转换断层上。在近海，太平洋西北部和阿拉斯加南部的洋壳被俯冲到北美板块之下，导致了喀斯喀特和阿留申山脉的活跃火山过程，历史记录中曾在那里发生过大的海啸地震。PBO还包括其他大地测量方式，包括钻孔应变仪和地震仪、长基线激光应变仪、倾斜仪和地面气象测量。大地测量记录在一定的频率范围内，1100个全球定位系统站点中的约400个以高速率(1赫兹)记录并实时传输数据。所有PBO数据和数据产品都集中在UNAVCO公司(www.unavco.org)存档，并可通过互联网免费获得。PBO数据产品用于解决北美地区广泛的科学和技术问题。美国和国际上的大量测量师和土木工程师每天都会访问PBO数据流、软件和其他在线资源。超过95%的PBO传感器资产所在的美国西部和阿拉斯加已经并将继续经历重大和潜在破坏性的地球物理事件，如地震、火山喷发和海啸。由PBO推动的科学为地球物理过程提供一级约束，以支持目前正在开发的灾害测绘和区划以及地震预警应用。根据新的NSF-UNAVCO，Inc.五年合作协议，PBO以及用于通过全球定位系统精确定位和支持卫星和航天器轨道定位的全球分布的大地测量基础设施，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，由于预算挑战，NSF直接削减了2012财年和之前财年发生的运营成本中的基准计量支持。因此，研讨会将设法确定这一重新确定基线的较长期影响，以及科学和其他优先事项将如何有助于确定PBO的哪些组成部分，特别是哪些组成部分有可能在不久的将来根据《五年合作协定》(2013-2018年)被终止。讲习班将支持具有广泛科学兴趣的一些科学和技术领袖、商业部门的代表以及相关的联邦和州机构代表举行会议，这些代表要么拥有基于免费和开放的板块边界观测站大地设施数据和数据产品的现有产品或商业模式，要么可能有兴趣在板块边界观测站资产和流的基础上开发新的业务或产品。讲习班将产生一份报告和网络资源，其中概括了社区审查的建议。***

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. ***