gps position time series @ jpl · gps network precise point positioning (ppp) • operational...

PRE-DECISIONAL DRAFT; For planning and discussion purposes only 1 6/6/13!

Mars Science Laboratory!GPS Position Time Series @ JPL

Susan Owen Jet Propulsion Laboratory,

California Institute of Technology Angelyn Moore, Sharon Kedar, Zhen Liu, Frank Webb,

Mike Heflin, Shailen Desai

© 2013 California Institute of Technology. Government sponsorship acknowledged.

PRE-DECISIONAL DRAFT; For planning and discussion purposes only 2

CALIFORNIA INSTITUTE OF TECHNOLOGY!

GPS Network Point Posi/oning Lead: Angie Moore

Geodynamics & Space Geodesy Group (GSGG)

JPL Opera/onal GPS Orbit Analysis

Lead: Shailen Desai Near Earth Tracking ApplicaAons

Group & Systems Group

GIPSY-‐OASIS Processing So>ware Lead: Shailen Desai

Near Earth Tracking ApplicaAons Group & Systems Group

Real-‐Time GIPSY/ GDGPS

Lead: Yoaz Bar-‐Sever Near Earth Tracking Systems

Group

JPL Global Time Series Analysis

Lead: M. Heflin GSGG

JPL/SOPAC MEaSUREs Combined Time Series & Veloci/es Leads: Y. Bock & S. Kedar

Scripps & GSGG

ARIA Time Series and Earthquake Response

Products Lead: S. Owen

GSGG, others @ JPL & Caltech

Overview of GPS Analysis Groups - Solid Earth

Global Plate Motion

Geocenter & Reference

Frame

Crustal Deformation

Earthquake & Eruption

Models

Earthquake& Volcano Response



GPS Network Precise Point Positioning (PPP)

•  Operational Analysis of Global GPS Stations –  2986 time series –  From Aug 15, 1992 to present –  Includes all of PBO Network –  Positions & Tropospheric products

added on weekly basis –  Products generated using JPL Final

orbits & clocks –  IGS08 reference frame –  Download raw time series from:

ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Timeseries/repro2011b/raw/

–  Go to website for more information: https://gipsy-oasis.jpl.nasa.gov , click on PPP data products



JPL Global Time Series

•  Post-processing of PPP solutions includes:

–  Outlier removal –  Offset detection –  Time Series Fit for velocities, offsets,

amplitude of annual and semi-annual periodic function

–  Parameter values available on website: http://sideshow.jpl.nasa.gov/post/series.html –  Plots available as well

•  2389 sites •  1995 to present •  Time series, residuals available at

ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Timeseries/repro2011b/post/

SOPAC -‐

GAMIT

Combina2on -‐st_filter

GPS observables + metadata

L0: GPS Observables + Metadata

L1A: Global Long term raw Geodetic Time Series L1B: Troposphere delay time series

L1C: Calibrated and Validated Global Geodetic Time Series L2A: Precipitable Water Vapor time series

JPL -‐ GIPSY

Global sta2on posi2ons

Global sta2on posi2ons

Global cal. & val. sta2on posi2ons

Principal Component Analysis

Time Series Analysis

Global filtered 2me series

L2B: Filtered Calibrated & Validated Global Geodetic Time Series L3A: Global Tectonic Velocities

Global Tectonic Veloci2es

JPL & SOPAC Combined Time Series

Tropospheric delays

Tropospheric delays

Independent atmospheric

data or Weather models

Precipitable Water Vapor generator

PWV

SOPAC Archive / CDDIS

GPS Explorer

Process

Product

Produced outside SESES

L1 Processes and products



New products

Legend

Solid Earth Science ESDR System



JPL/SOPAC Coverage, Time Series

MEaSUREs 2006 MEaSUREs 2012

Time Series Analysis: •  1992 - present

•  1-2 week latency in updates to time series •  1845 sites - will expand under MEaSUREs 2012 •  Outlier removal •  Velocities, offsets, seasonal amplitudes and phase, postseismic transients

Common Mode Error removed from filtered time series •  PCA analysis •  Only time series residuals from well-behaved sites used in PCA



JPL/SOPAC Combined Time Series



Advanced Rapid Imaging and Analysis



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ARIA Data Systems Overview

•  ARIA-‐EQ prototype data system –  Current automated capabili2es

•  InSAR –  Raw frames (ALOS, ENVI, CSK) –  Geocoded interferograms –  On-‐demand Damage Proxy Map

•  GPS –  Kinema2c Posi2on Time Series (sub-‐daily posi2ons) –  Daily Posi2on Time Series –  Quality control

–  Runs on Beowulf compute cluster –  Year 3 developing automated EQ Product and fault modeling capability

•  ARIA-‐MH data system –  Migrate capabili2es onto hybrid cloud compu2ng infrastructure. –  Integrate Monitoring Data Products (e.g., InSAR Time Series Analysis)

•  REPAIR -‐ Integrate ARIA Products with USGS NEIC •  ARIA Co-‐Laboratory -‐ Build Analysis & Modeling Workbench



ARIA EQ: Events with Demo Response Data Products

2010 M7.0 Haiti •  Coseismic Interferogram 2010 M7.2 M El Mayor-Cucapah •  GPS offsets •  Coseismic Interferograms •  SAR Pixel offset image

2011 M9.0 Tohoku •  GPS displacement waveforms •  GPS coseismic offsets (mainshock,

major aftershock) •  Coseismic interferograms (mainshock,

aftershock) •  Damage Proxy Map (for tsunami

damage in select regions)

2011 M6.3 Christchurch •  Coseismic interferogram •  Damage Proxy Map

2011 M7.1 Van •  Coseismic Interferogram •  SAR Pixel offset image •  GPS coseismic offsets

2012 Brawley Seismic Swarm (M5’s) •  GPS displacement waveform •  GPS coseismic offsets (for cumulative

events) 2012 M7.6 Costa Rica •  GPS displacement waveform •  GPS coseismic offsets

2013 M5.8 Sumoto, Japan •  GPS coseismic offsets



ARIA Monitoring Data Products

Product Needs/Applications

GPS time series and displacements

Forms the basis for higher level products. Provides high temporal resolution for monitoring surface deformation, transient detection.

InSAR displacements Forms the basis for higher level products. Provides high spatial resolution maps of surface deformation for assessing hazards.

Coherence Change maps and time series

Detects damage from lava flow, ash fall, earthquakes, landslides, levee failure, floods, etc. Very useful with all-weather day/night capability and comprehensive coverage. U.S. patent for algorithm (Yun et al., 2011b).

InSAR Time Series Provides history of surface deformation with high spatial resolution, input for data fusion and transient detection.

Reflectivity Change maps Detects damage from flood and tsunami. Can provide volcano monitoring capability. Very useful with all-weather day/night capability and comprehensive coverage.

Troposphere-corrected interferograms

Higher fidelity surface deformation measurements.

Combined GPS and InSAR 3D surface motion maps

High spatial and temporal resolution products for monitoring. Provides basis for transient detection.

Advisory Alerts of anomalous ground motion

Identifies regions that need further investigation. Useful for regions where data set is too large to evaluate manually



Summary/Comments

•  Different flavors of GPS time series analysis at JPL –  Use same GPS Precise Point Positioning Analysis raw time series –  Variations in time series analysis/post-processing driven by different

users. •  JPL Global Time Series/Velocities - researchers studying reference frame,

combining with VLBI/SLR/DORIS •  JPL/SOPAC Combined Time Series/Velocities - crustal deformation for

tectonic, volcanic, ground water studies •  ARIA Time Series/Coseismic Data Products - Hazard monitoring and

response focused

•  ARIA data system designed to integrate GPS and InSAR –  GPS tropospheric delay used for correcting InSAR –  Caltech’s GIANT time series analysis uses GPS to correct orbital errors

in InSAR –  Zhen Liu’s talking tomorrow on InSAR Time Series analysis…

gps position time series @ jpl · gps network precise point positioning (ppp) • operational...

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