Modernization of Existing Long-Base Strainmeters at Pinyon Flat and Durmid Hill

这笔拨款用于支持加州皮农平坦天文台（PFO）和杜密德山（DH）现有的长基线激光应变仪的现代化。将增加新的激光、真空、温度硬件和控制软件组件，以使这些现有的激光应变仪仪器与作为板块边界天文台项目一部分安装的新仪器的运行标准相同。此次升级将实现现场自动化和远程诊断监测，无需多次现场访问，从而降低长期运营和维护成本，提高数据质量。PFO和DH激光应变仪以极高的灵敏度测量南加州太平洋/北美板块边界的随时间变化的变形，升级后的仪器补充了GPS、钻孔和激光应变仪，这些仪器是EarthScope/PBO的一部分，旨在了解活跃板块边缘的大陆变形动力学和地震过程。升级后的仪器的原始数据和数据产品将通过网络免费提供。来自PFO和DH的长时间序列数据提供了一个有价值的基线，可以与来自PBO的新数据进行比较。

Funds from this grant support modernization of the existing long-baseline laser strainmeters at Pinon Flat Observatory (PFO) and Durmid Hill (DH), California. New laser, vacuum, temperature hardware, and control-software components will be added to make these existing laser strainmeter instruments operate to the same standards as new instruments being installed as part of the Plate Boundary Observatory project. The upgrades will allow for onsite automation and remote diagnostic monitoring, eliminating the need for many onsite visits and therefore reducing long term operating and maintenance costs and improving data quality. PFO and DH laser strainmeters measure of time-dependent deformation along the Pacific/North-American plate boundary in southern California with extreme sensitivity and the upgraded instruments complement GPS, borehole and laser strainmeter instruments being installed as part of EarthScope/PBO in an effort to understand the dynamics of continental deformation and earthquake processes at an active plate margin. Raw data and data products from the upgraded instruments will be made freely accessible via the web. The long time series Data from PFO and DH provide a valuable baseline, against which new data from the Plate Boundary Observatory (PBO) can and will be compared.