GPS Explorer: Overview and Extension to INDIGO http:geoapp'ucsd'edu

1
GPS Explorer Overview and Extension to
INDIGOhttp//geoapp.ucsd.edu

• Paul Jamason Scripps Orbit and Permanent Array
  Center (SOPAC )
• IGS Analysis Center Workshop, Miami, 2008

2
GPS Explorer Background

• NASA REASoN project to provide GPS data
  products/services using new web
  technologies/standards
• project overview http//reason.scign.org
• java-based web portal web 2.0 (mapping,
  inter-portlet communication)
• develop common formats (xml) and methods (web
  services) for improved metadata and data exchange
• Geophysical Resource Web Services
  http//reason.scign.org/scignDataPortal/grwsSummar
  y.jsp
• NASA MOSES project to allow users to perform
  modeling in a portal context
• application of various time series models

3
GPS Explorer Framework

• Uses the
• JSR-168 compliant portlets (java-based windows in
  portal with user controls distributable to other
  portals)
• user logins save data/results for future viewing
• standard look/feel across pages easy
  configuration
• Employs a workflow/dashboard approach
• users select and save groups of GPS sites via
  mapping portlet. Data queries, modeling
  operations are performed throughout portal on
  saved groups.
• Inter-portlet communication
• Dynamic content produced via calls to back-end
  web services

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GPS Explorer Portal Mapping

• SOMI Scripps Online Mapping Interface
• University of Minnesota MapServer input data
  layers stored at SOPAC (e.g., fault lines)
• interactive velocity vectors
• users can draw bounding boxes to select sites
• recent performance optimization
• Migrating to OpenLayers
• open source API
• user community
• utilize non-google data layers
• MapServer tile caching

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GPS Explorer Portal Products

• Processed GPS coordinates
• millions of xyz coordinates from SOPAC/JPL/REASON
  combination/PBO
• dynamically queryable and exportable to urls
• GPS Time Series
• layer time series from different sources/sites
  via Java Applet
• display time series dynamically by clicking sites
  on map
• Velocities
• view/layer velocity vectors for various
  sources/reference frames
• Strain Maps
• under development

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• (GPS Explorer Web Demonstration)

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GPS Explorer Portal Geophysical Resource Web
Services

• Standardized approach to data submission/retrieval
  
• Inter-agency data exchange
• Use XML standards
• Geography Markup Language (GML) represent
  features/geometry/reference systems/time
• observation collections filter encoding
• transfer XML via SOAP/web services
• alternatives JSON, REST
• Advantages
• Independent server-side code. call web services
  from other web pages/sites, command-line
  utilities, etc.
• Adaptable - e.g., REASoN -gt INDIGO new web
  services

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XML and Geodesy at SOPAC IGS Site Logs

• Overview http//sopac.ucsd.edu/projects/xml

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Sample XML IGS Site Log
ltigsSiteLog xmlns"http//sopac.ucsd.edu/ns/geod
esy/doc/igsSiteLog/2004" xmlnsmi"http//sopac.
ucsd.edu/ns/geodesy/doc/igsSiteLog/monumentInfo/20
04" xmlnsequip"http//sopac.ucsd.edu/ns/geodes
y/doc/igsSiteLog/equipment/2004"
xsischemaLocation"http//sopac.ucsd.edu/ns/geode
sy/doc/igsSiteLog/2004 http//sopac.ucsd.edu/ns/g
eodesy/doc/igsSiteLog/2004/igsSiteLog.xsd"
xmlnsxsi"http//www.w3.org/2001/XMLSchema-instan
ce"gt ltsiteIdentificationgt
ltmisiteNamegtScripps 5 - Mt. Soledadlt/misiteNamegt
ltmifourCharacterIDgtSIO5lt/mifourCharacterIDgt
ltmimonumentInscriptiongtSIO5
ECCSlt/mimonumentInscriptiongt
ltmiiersDOMESNumbergt40460M006lt/miiersDOMESNumbergt
lt/siteIdentificationgt ltsiteLocationgt
ltmicitygtLa Jollalt/micitygt
ltmistategtCalifornialt/mistategt
ltmicountrygtUSAlt/micountrygt
ltmiapproximatePositionITRFgt
ltmixCoordinateInMetersgt-2456115.13lt/mixCoordinat
eInMetersgt ltmiyCoordinateInMetersgt-4768905.
79lt/miyCoordinateInMetersgt
ltmizCoordinateInMetersgt3439232.44lt/mizCoordinate
InMetersgt ltmilatitude-Northgt325024.00lt/mi
latitude-Northgt ltmilongitude-Eastgt-1171500.
00lt/milongitude-Eastgt ltmielevation-m_ellip
s.gt185.53lt/mielevation-m_ellips.gt
lt/miapproximatePositionITRFgt lt/siteLocationgt
ltgnssReceivergt ltequipreceiverTypegtASHTECH
Z-XII3lt/equipreceiverTypegt
ltequipsatelliteSystemgtGPSlt/equipsatelliteSystemgt
ltequipserialNumbergtLP02814lt/equipserialNumb
ergt ltequipfirmwareVersiongtCD00lt/equipfirmwar
eVersiongt ltequipdateInstalledgt2002-05-15T000
0Zlt/equipdateInstalledgt ltequipdateRemovedgt20
03-01-09T0000Zlt/equipdateRemovedgt
lt/gnssReceivergt ltgnssAntennagt
ltequipantennaTypegtASH701945B_Mlt/equipantennaType
gt ltequipserialNumbergtCR519991867lt/equipseria
lNumbergt ltequipantennaReferencePointgtBPAlt/equ
ipantennaReferencePointgt ltequipmarker-arpUpE
cc.gt0.0083lt/equipmarker-arpUpEcc.gt
ltequipdateInstalledgt2002-05-15T0000Zlt/equipdate
Installedgt ltequipdateRemovedgt2004-09-29T0000
Zlt/equipdateRemovedgt ltequipnotesgtlt/equipnot
esgt lt/gnssAntennagt
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GPS Explorer Portal INDIGO

• SOPAC and INDIGO
• Inter-service Data Integration for Geodetic
  Operations
• systems enabling the simultaneous use of multiple
  space geodetic techniques
• Utilize IT resources and JPL collaboration in
  support of IGS
• Potential development areas
• Include all GNSS sites at CDDIS/JPL/IGN (GSAC)
• Extend GPS Explorer capabilities to include
  SLR/VLBI/DORIS
• Site mapping
• Common data exploration/visualization tools
• Incorporate GPS products into (next-generation?)
  GSAC
• Provide web services wrapper to GSAC

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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
• Javascript development
• Evaluate other portal frameworks (JBOSS)
• Interactive Strain Maps

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Login Page
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Site Selection
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Site Data Visualization
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GPS Site Processed Coordinates
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GPS Site Position Time Series
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GPS Site Velocities
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Strain Resources
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Filter Time Series Job Setup
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Filter Time Series Output