Acquisition of New GPS Equipment in Support of the Central Andes GPS Project (CAP)

采购新的 GPS 设备以支持安第斯山脉中部 GPS 项目 (CAP)

• 批准号: 0214523
• 负责人: Michael Bevis
• 金额: $ 12万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-15 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0214523&HistoricalAwards=false
• 关键词: Acquisition; New; GPS; Equipment; Support

0214523BevisThis grant supports the acquisition of eight global positioning system (GPS) receivers for active tectonic research in the central Andes of South America. Four of the proposed receivers will be permanently deployed in continuous mode operation (CGPS) while the other four will be used in campaign or survey mode (SGPS). The receivers will augment and/or act as replacements for aging receivers used by the University of Hawaii Geodesy group (hereafter named the Pacific Geoscience Facility - PGF) for the on-going collection of GPS data surrounding the active fore arc region of the central Andes. The Central Andes Project (CAP) has been funded by NSF/EAR since 1992 (EAR-9115576). Temporal and spatial densification of GPS measurements in this region will contribute to a better understanding of two fundamental questions in geophysics including: 1) what is the contribution of viscoelastic relaxation to crustal deformation following a great subduction zone earthquake?, and 2) what is the viscosity of the mantle? A densification of CGPS measurements surrounding the epicenter of the 1960 Chilean earthquake will help to resolve the former question while CGPS vertical positioning in Chilean Patagonia will further constrain the rate of post-glacial rebound which can then be used to calculate lower crustal and mantle viscosity. An understanding of the long term seismic cycle following a great subduction zone earthquake has significant implications for mitigating seismic hazards for population centers along the Andean Cordillera. These receivers will also support collaborations between the PGF and Chilean and Argentinean geoscientists. In-country scientists will collect campaign GPS data at frequencies that are logistically unrealistic for the PGF group, improving the output of the CAPS project for a marginal cost to the NSF.***

0214523Bevis这笔赠款支持购买八个全球定位系统(GPS)接收器，用于南美洲中部安第斯山脉的活跃构造研究。拟议的四个接收器将永久部署在连续模式操作(CGPS)中，另外四个将用于战役或调查模式(SGPS)。这些接收器将扩充夏威夷大学大地测量小组(下称太平洋地球科学设施--PGF)使用的老化接收器，并/或作为其替代品，以持续收集围绕安第斯山脉活动弧前区域的全球定位系统数据。中央安第斯项目自1992年以来一直由国家科学基金会/EAR资助(EAR-9115576)。该地区GPS测量的时空致密化将有助于更好地理解地球物理中的两个基本问题：1)大俯冲带地震后粘弹性松弛对地壳形变的贡献；2)地幔的粘性是什么？1960年智利地震震中周围的CGPS测量的致密化将有助于解决前面的问题，而智利巴塔哥尼亚的CGPS垂直定位将进一步限制冰后反弹的速度，然后可用于计算下地壳和地幔的粘性。了解大俯冲带地震后的长期地震周期对于减轻安第斯科迪勒拉地区人口中心的地震灾害具有重要意义。这些接收器还将支持太平洋岛屿论坛与智利和阿根廷地球科学家之间的合作。国内科学家将以对PGF团队来说不现实的频率收集竞选GPS数据，以NSF的边际成本提高CAPS项目的产出。*