March 11 M9.0 Tohoku Earthquake +60s: Mw 8.47 GPS can rapidly constrain momentGPS can rapidly constrain moment +90s: Mw 8.80 +120s: Mw 9.04.

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Presentation transcript:

March 11 M9.0 Tohoku Earthquake

+60s: Mw 8.47 GPS can rapidly constrain momentGPS can rapidly constrain moment +90s: Mw s: Mw 9.04

No stable reference station in a 2-state radius!

READI Data ProductsREADI Data Products Level-0: Phase and range data delivered in real-time Level-1: Point-position + cov time series delivered in real- time (also tropospheric PWV and ionospheric TEC) Level-2: Seismic source estimates delivered in real-time Level-3: rtGPS-derived products and positions integrated into seismic and other monitoring systems

CWUs READI SystemCWUs READI System Telemetry hub + archive for all 470 PANGA + PBO sites (Level-0 data product) Real-time PPP system (Level-1) Seismic + tsunami analysis code (Level-2) Database to receive and distribute position time series and derived Level 2 data products GUI to interface with the Level 1 & 2 data (GPS Cockpit)

PPP with RTSE & GIPSY 6.2PPP with RTSE & GIPSY 6.2 Real-time Stream Editor precleans phase & range data Uses geometry-free linear combination to flag and fix slips & biases Takes into account different weighting for different observations Stable, lightweight 5-state Kalman filter processing per satellite Facilitates parallel processing Fast convergence and re-convergences < 1 min at 1 Hz Provides ionospheric delay as a byproduct Physical models (tides, ocean loading, phase windup, relativistic effects ) are predicted and applied as corrections to Level-0 data to improve accuracy and help to reduce convergence time. Concurrent GIPSY runs on 20-epoch arcs, last five epochs shunted into rt streams Run-time is under 0.5 second (w/ smapper.small.e) GIPSYs models are excellent (truth)

RTSE post-processing results using GOA 6.1.2RTSE post-processing results using GOA P494 Sierra El Mayor Earthquake 7.1 Mw 04/04/2010

CWUs READI SystemCWUs READI System Telemetry hub + archive for all 470 PANGA + PBO sites (Level-0 data product) Real-time PPP system (Level-1) Database to receive and distribute position time series and derived Level 2 data products Seismic + tsunami analysis code (Level-2) NIF run on positions + covs (McGuire & Segall, 2003) ComCot used to compute tsunami hydrodynamic GFs GUI to interface with the Level 1 & 2 data (GPS Cockpit)

Level-1 & Level-2 database & client request systemLevel-1 & Level-2 database & client request system Accept rtGPS solutions from various sources, in various formats SQL-Server based Up to 24 hrs of data held in multiple buffers & sample rates Level-1 & 2 products streamed on a client request basis Uses HTTP, JSON and BSON formats to serve data to clients Well-documented API

CWUs READI SystemCWUs READI System Telemetry hub + archive for all 470 PANGA + PBO sites (Level-0 data product) Real-time PPP system (Level-1) Database to receive and distribute position time series and derived Level 2 data products Seismic + tsunami analysis code (Level-2) NIF run on positions + covs (McGuire & Segall, 2003) ComCot used to compute tsunami hydrodynamic GFs GUI to interface with the Level 1 & 2 data (GPS Cockpit)

CWUs READI SystemCWUs READI System Telemetry hub + archive for all 470 PANGA + PBO sites (Level-0 data product) Real-time PPP system (Level-1) Database to receive and distribute position time series and derived Level 2 data products Seismic + tsunami analysis code (Level-2) NIF run on positions + covs (McGuire & Segall, 2003) ComCot used to compute tsunami hydrodynamic GFs GUI to interface with Level 1 & 2 data (GPS Cockpit)

GPS Cockpit: Time for a demoGPS Cockpit: Time for a demo

Time seriesTime series

Instantaneous PositionsInstantaneous Positions

Peak Ground DisplacementPeak Ground Displacement

Megathrust Finite FaultingMegathrust Finite Faulting

Tsunami 50mTsunami 50m