- Related Research Areas
- Earth Surface & Interior
By July 2008 143 high-rate, real-time GPS receivers mounted on CWU-built, tectonics-grade monuments will have been installed throughout Washington and Oregon. These stations straddle active crustal faults, volcanoes and landslides, the tsunamigenic regions along the Pacific coast, and man-made structures. All data from this (non-PBO) network is currently streamed in real time to CWU, where it is archived, down-sampled to 30-seconds, and processed daily with GIPSY. We request funding here to implement real-time positioning of these high-rate stations using the Real-Time GIPSY software and streamed satellite orbit and clock corrections from JPL’s Global Differential GPS System. The resultant data streams will include point-position estimates in a global reference frame every second at an accuracy of several centimeters. These measurements will be used in turn to monitor strong ground motion resulting from a wide variety of natural hazards such as earthquakes and landslides, as well as tropospheric and ionospheric weather. Existing software will be modified to invert deformation measurements continuously with Kalman filtering, as well as to enable third party users to utilize these data streams via standard streaming protocols. The requested budget includes $50K/year to pay for the real-time orbit and clock correction streams from JPL. This is the current cost structure for all third-party users of these corrections and will be removed from the budget if GDGPS waives this fee. The proposed research directly addresses the scientific challenge identified in the Solid Earth Science Working Group Report of quantifying deformation across the spectrum at plate boundaries in pursuit of mitigating their attendant natural hazards. It also directly addresses the ESI Strategic goals of using earth surface deformation to predict and mitigate natural hazards, of leveraging existing observational capabilities and infrastructure, and of supporting interdisciplinary research between GPS, seismology and tropospheric and ionospheric research.
Project PI: Timothy Melbourne/Central Washington University
PANGA Geodesy Lab Department of Geological Sciences Central Washington University Ellensburg, WA 98926-7417
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