GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer: Overview and Extension to INDIGO Paul Jamason | Scripps Orbit and Permanent Array Center (SOPAC ) IGS Analysis Center Workshop, Miami, 2008

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer/INDIGO: Participants GPS Data Products for Solid Earth Science; NASA REASON CAN PI’s: Frank Webb, JPL; Yehuda Bock, SOPAC; Sharon Kedar, JPL Ruey-Juin Chang, Peng Fang, Paul Jamason, Ian MacLeod, Linette Prawirodirdjo, Melinda Squibb, George Wadsworth (SOPAC); Danan Dong, Sue Owen (JPL) Modeling On-the-Fly Solutions for Earth Science; NASA ACCESS Project PI’s: Marlon Pierce, Indiana University (and above PI’s) Robert Granat, Jay Parker (JPL), Galip Aydin (IU) (and above) INDIGO: Inter-Service Data Integration for Geodetic Operations; NASA REASON CAN PI: Ruth Neilan (JPL/IGS) Co-I’s: Angie Moore, Frank Webb (JPL); Dave Stowers (JPL/IGS); Carey Noll (NASA/GSFC/CDDIS); Mike Pearlman (CFA/ILRS); Dirk Behrend (NVI/IVS)

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Background 5-year NASA REASoN project (GPS Data Products): deliver analysis products using newer IT standards Portlet-based web portal; web 2.0 (mapping, inter-portlet communication) Develop/use standard formats (XML) and methods (web services) for improved metadata and data exchange NASA ACCESS project (MOSES): users perform modeling via portlets Apply various time series models (QOCA, RDAHMM) Extend to INDIGO: integration of multiple space geodetic techniques Leverage GPS Explorer technologies GNSS/VLBI/SLR/DORIS: provide uniform methods of data retrieval

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Framework Uses the java-based windows in web portal with user controls; can be used in other portal frameworks (JSR-168 standard) user accounts; save data/results for future viewing Employs a workflow/dashboard approach users select and save groups of GPS sites via mapping portlet. Data queries, modeling operations are performed on these in other tabbed pages. Inter-portlet communication Dynamic content produced via calls to back-end web services

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Portal: Content Mapping Interface SOMI: Scripps Online Mapping Interface University of Minnesota MapServer; input data layers stored at SOPAC (e.g., fault lines) Draw bounding boxes to dynamically select sites Recent performance boost - faster map loading Migrating to OpenLayers open source version of Google Maps Processed GPS coordinates millions of xyz coordinates from SOPAC/JPL/REASON combination/PBO combination dynamically queryable and exportable to urls GPS Time Series, Velocities, Strain Maps

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Web Demonstration

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Portal: Geophysical Resource Web Services Standardized approach to data submission/retrieval Inter-agency data exchange of processing metadata, coordinates Use XML standards Geography Markup Language (GML): represent features/geometry/reference systems/time observation collections; filter encoding transfer XML via SOAP/web services Independent server-side code GPS Explorer is only a client Call web services from other web pages/sites, command-line utilities, etc.

GPS Explorer - IGS AC Workshop - Miami 2008 SOPAC INDIGO Support: XML IGS Site Logs Overview:

Sample XML IGS Site Log <igsSiteLog xmlns=" xmlns:mi=" xmlns:equip=" xsi:schemaLocation=" xmlns:xsi=" Scripps 5 - Mt. Soledad SIO5 SIO5 ECCS 40460M006 La Jolla California USA ASHTECH Z-XII3 GPS LP02814 CD T00:00Z T00:00Z ASH701945B_M CR BPA T00:00Z T00:00Z

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Portal: INDIGO SOPAC and INDIGO Utilize IT resources and JPL collaboration in support of IGS Potential development areas: Include all GNSS sites at CDDIS/JPL/IGN Extend GPS Explorer capabilities to include SLR/VLBI/DORIS Site mapping Common data exploration/visualization tools Global Seamless Archive Center (publication of data archive holdings) Incorporate GPS analysis products Web services wrapper

GPS Explorer - IGS AC Workshop - Miami 2008 GPS Explorer Portal: Future Focus on IGS support via INDIGO How can GPSE serve as common interface for user access to data/metadata? Add “Products” tab Portal name change? Evaluate/implement feedback from user survey, NASA website developers Ingest/display new data sources Cross-browser compatibility Interactive Strain Maps

GPS Explorer - IGS AC Workshop - Miami 2008 Conclusion/Discussion Feedback GPS Explorer: Click on “Feature Requests” at top of any page pjamason-at-ucsd.edu

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Site Selection

Site Data Visualization

GPS Site Processed Coordinates

GPS Site Position Time Series

GPS Site Velocities

Strain Resources

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