scign reason can update

SCIGNREASoN CAN

Update

Frank Webb

September 19, 2004

April 19, 2023 SCIGN REASoN Project 2

Current Team

• Yehuda Bock (SIO)• Ruey-Juin Chang (SIO)• Danan Dong (SIO)• Peng Fang (SIO)• Jeff Genrich (SIO)• Paul Jamason (SIO)• Sharon Kedar (JPL)• Nancy King (USGS)• David Malveaux (SIO)• Brian Newport (JPL)• Sue Owen (JPL)• Linette Prawirodirdjo (SIO)• Michael Scharber (SIO)• Keith Stark (USGS)• Frank Webb (JPL)


REASoN

• Goals• Status

– Architecture– Interim Milestones for rest of Year (July 2005)– Combination– GPS Explorer


SCIGN REASoN Goals

• Generate higher level products from SCIGN data for use by the SCIGN community

• Apply modern IT methodology within SCIGN to:– Produce and disseminate higher-level data products to a larger community of

• Scientists• Government agencies (Federal, State, and Local)• Surveyors• GIS professionals

• Build on current capabilities within SCIGN for data archiving, information systems, and data analysis to disseminate the following products:

– Geodetic position time series– Crustal motion models– Strain rate maps– Geologic fault models– Near-real-time earthquake response information– Geodetic reference systems for precise GIS and surveying

• Improve capabilities in– Archiving– End-user interfaces– Delivery mechanisms– Data modeling

• Open source project based on a redundant, multi-tiered “Virtual Archive” for GPS applications.


High Level Requirements

• Needs• Products are “scientific publication” quality

– Verified, validated, and reference able• Processing centers and processes use the same input data

• Goals• All processing retrieves data from a common source• Products are quantified, reproducible, and based on verified and

validated data and established processes• Web distribution of products contains complete information on

product generation• Objectives

• Employ Seamless Archive• Interface through Web services• Pull data at time of analysis• Push results into archive• Pull products from archive for distribution• Provide full accounting of product• Provide tools/recipes for product reproduction• Provide On-demand analysis


Status

• Architecture– Framework is defined based on web services– Interfaces are being defined, developed, and documented on

the web• Combination

– Validated QOCA against GLOBK• Found several quantitative and reasoning issues

– SIO and JPL solutions are being combined with QOCA– Producing web products using interim interfaces on a weekly

basis• GPS Explorer

– Prototype web portal for exploring GPS data products• http://reason.scign.org

– Combined products being posted on web on a weekly basis• Interim Milestones

– Combination based on prototype web services by SCIGN annual meeting in Spring 2005

– Combined products based on web services by July 2005

http://reason.scign.org/


SCIGN REASoN CyberInfrastructure

• Structured around Four systems– Product Input

• Seamless Archive a community based system

• Via web services– GPS Data Processing

• Verified and validated products using 2 independent systems

• GAMIT and GIPSY– Product Generation

• Based on award winning QOCA software

– Product Delivery• Via Virtual Archive• With web services

– Meta data– Products

• Extensible to EarthScope Needs for High Level Product Generation and Distribution for

– PBO– SAFOD– USArray

While project was endorsed by UNAVCO and product levels were adopted by PBO, there currently are no official connections with EarthScope.


High Level Architecture


Combination

• Our philosophy– The conventional combination approach simply aligns

several loosely constrained solutions to a predefined reference system using 7-parameter Helmet transformation.

– A more rigorous combination approach should consider both the systematic differences and random errors.

– We are pursuing such a more rigorous approach.

• Current progress in our combination process:– Validate process against GLOBK v 5.06 and v 5.08– ST filter development– Automated combination generation every week using

interim web interfaces– Solution quality report development– Some open issues to be addressed by SCIGN Annual

Meeting


Combination

• Based on QOCA software– http://gipsy.jpl.nasa.gov/qoca/

• Technique validated against GLOBK• Issues found

– Pole tide correction GAMIT uses absolute pole position. While several mmGIPSY uses de-mean pole position. GLOBK

V 5.06 has no correction. V 5.08 performs backward de-mean pole correction.

– Network constraint GLOBK v 5.06 has a bug, v 5.08 has corrected sub-mm to 1 mmweighting such a bug.

Bug: var_tot = var_tot + cov_parm(jel,jel)**2Should be: var_tot = var_tot + cov_parm(jel,jel)

– Network constraint GLOBK v 5.08 adds a new criterion based on 2-3 mm sometimesoutlier criterion horizontal postfit sigmas.GIPSY uses different outlier criteria.QOCA tries to match GLOBK v 5.08 criteria first and modifies it later.

– Geodetic datum GLOBK, GAMIT use flatness 1/298.257222101 1-2 mm level

(NAD83). GIPSY uses 1/298.257 (IERS89).QOCA uses 1/298.257223563 (WGS84).

– Network constraint GLORG has a bug of calculating median value of 3-5 mm or upmedian value postfit residuals

– Network constraint GLORG criterion for horizontal postfit residual 3-5 mm or udelete site criterion has some inconsistency,will be modified in QOCA.

http://gipsy.jpl.nasa.gov/qoca/




Combination Status

• Producing web products using interim interfaces on a weekly basis

• Products extend back to 6 months and counting• Available at

– http://reason.scign.org/

• Open issues to be addressed by SCIGN Annual Meeting 2005– Reference frame – Relative weighting– Quality assurance strategy– Desired latency for products– Sub-network strategy– Regional filtering strategy



GPS Explorer

• The web portal for accessing SCIGN productshttp://reason.scign.org/

• Documents REASoN project including– Overall project description– Interface definitions

• Provides access to SCIGN Products– Combined solution

• Graphical representation of combined time series and network performance metrics

• Combined solution based on– SIO and JPL solutions– Combined using QOCA

• Currently, uses interim interfaces to update products weekly

• User Forum – UBB software



SCIGN Data Portal


High Level Schedule


Interim Data Flow


Combination quality test

• Evaluation combination quality based on residual strain

• 1-week test strain map


Architecture Interfaces

• Next slide shows– Functions on the

diagonal– Interfaces on the off

diagonals• Who and what in the

off diagonal boxes

Function 1

Function 2

Function 3

Function 4

Output fromFunction 1

which is input toFunction 4

Output fromFunction 4

which is input toFunction 2


Architecture Interfaces

Seamless Archive - Product Input GPS Data processing Product Generation (Level 1-3) Seamless Archive - Product Output

End-user input to change data/analysis

settings.J PL Orbits; GIPSY setup files(SK, MH, FW, BN)

SIO Orbits; GAMIT Setup files(PJ )

Setup files defining how, when, etc.(DD, LP)



All setup files(SK,FW, DD, LP,??)

GPS Explorer Admin GUI Interface

(SIO-MS, USGS-KS)

GSAC/ WS/ DB (SIO -BG,MS)

Station info (positions, ant. types, ht, etc)(BN, MH, PJ )

Station info (positions, ant. types, ht, etc)(PJ )

Virtual Archive (SIO-MS,BG,USGS-

KS) Rinex files (BN, BG)

Rinex files(MS,PJ )

Request for station info; station list (BN, PJ )

Request for GPS data (BN, PJ )

GIPSY/ RTG(JPL - SK) GIPSY solution and

covariance (SK, MH, DD,?? )

GE Admin effects GAMIT processing.

(PF,PJ )Request for station info; station list(PJ )

Request for GPS data(MS,PJ )

GAMIT/ RTD (SIO-PF,PJ ,YB) GAMIT solution and

covariance(???)

QOCA Combination (JPL-DD, SIO-LP)

Combined Time Series (DD, LP, BG, MS)

QOCA Velocity Field (JPL-DD, SIO-LP,PJ )

Request for combined time series; Combined Velocity and Quality Metrics (DD, LP, BG, MS)

QOCA Geophysical Parameters

(JPL-DD, SIO-LP,PJ )

Request for combined product; Strain Map; Fault Param; Q- Metrics (DD, LP, BG, MS)

GE Admin will effect Virtual Archive

settings.

GIPSY and GAMIT solutions and covariance (DD, LP, ??)

Combined Time Series (DD, LP, BG, MS)

Combined Velocity Map (DD, LP, BG, MS)

Virtual Archive (SIO-MS,BG,USGS-

KS)

scign reason can update

Documents

scign data

qocaproducing web products

web servicespull data

higherlevel data products

validated products

validated data

following products

archivepull products