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http://datafedwiki.wustl.edu/index.php/2006-12-06_UA_Huntsville_Seminar
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Part I
DataFed
An Agile Distributed Air Quality Data System
Rudolf B. HusarWashington University, St. Louis
Seminar Presented atUniversity of Alabama, Dept. of Atmospheric Sciences
December 6, 2006
Revolution in Sensing (1990s) & Delivery (2000+)
Real-time Air Pollution Sensing and Reporting
High Resolution Satellite DataSurface PM25 and Ozone Data
Smoke Plumes
Changes in Air Quality Management
Command & Control
Weight of Evidence
Flexible NAAMS
Rigid Monitoring
• The data life cycle consists of the acquisition and the usage parts
Usage ActivitiesData Acquisition
Data Acquisition and Usage Activities(Select View Show, click to step through PPT)
• The acquisition part processes the sensory data by firmly linked procedures
The focus is on data usage activities
• The usage activities are more iterative, dynamic procedures
• The collected and cleaned data are stored in the repository
Data Repository
• The usage cycle transform data into knowledge for decision making
Decisions
Stages of AQ Data Flow and Value-Adding Processes
Domain ProcessingData Sharing
Std
. In
terf
ace
Gen. ProcessingS
td.
Inte
rface
Data
Control
Reports
Reporting
Obs. & Models Decision Support System
Analyzing
Filter/IntegrateAggregate/FuseCustom Analysis
Organizing
DocumentStructure/FormatInterfacing
Characterizing
Display/BrowseCompare/Fuse Characterize
Valu
e-A
dd
ing
P
rocesses
Reporting
Inclusiveness Iterative/Agile Dynamic Report
Generic Decision Support for Air Quality Decisions
Global Earth Observing System of Systems
GEOSS
Architecture Framework
Knowledge into the Minds of
Regulatory Analysts
Knowledge into the Minds of
Technical Analysts
Observations
Reports:Model Forecasts,
Obs. Evidence
Models
DecisionsKnowledge
into the Minds of
Decision- making managers
Decision Support System
Characteristics of System of Systems (SoS)
• Autonomous constituents managed/operated independently• Independent evolution of each constituent• Displays emergent behavior
Must recognize, manage, exploit the characteristics:
• No stakeholder has complete SoS insight• Central control is limited; distributed control is essential• Users, must be involved throughout the life of a SoS
Differentiating System Engineering and System of Systems Engineering
“System of Systems Engineering for Air Force Capability Development”, 2005
Air Quality ClusterTechTrack
Earth Science Information PartnersPartners
• NASA• NOAA• EPA
• (?)• USGS• DOE• NSF• Industry…
Air Quality Information System Architecture
Flow of DataFlow of Control
Air Quality Data
Meteorology Data
Emissions Data
Informing Public
AQ Compliance
Status and Trends
Network Assess.
Tracking Progress
Data to Knowledge Transformation
Data Products Knowledge ProductsMediators
Loosely Coupled Data Access through Standard Protocols
The next three slides describe the key technologies used in the creation of an adaptable and responsive air quality information system.
OGC data access protocols and standard formats facilitate loose coupling between data on the internet and processing services.
For air quality, the Web Coverage Service (WCS), provides a universal simple query language for requesting data as where, when, what. That is: geographic (3D bounding box), time range and parameter.
The Web Map Service (WMS) and Web Feature Service (WFS) are also useful.
The use of standard data physical data formats and naming conventions elevates the syntactic and semantic interoperability.
Within DataFed all data access services are implemented as WCS or WMS and optionally WFS. General format adapter components permit data request in a variety of standard formats.
GetCapabilities
GetData
Capabilities, ‘Profile’
Data
Where? When? What? Which Format?
Server
Back End S
td.
Inte
rface
Client
Front EndS
td.
Inte
rface
Query GetData Standards
Where? BBOX OGC, ISO
When? Time OGC, ISO
What? Temperature CF
Format netCDF, HDF.. CF, EOS, OGC
T2T1
Domain ProcessingData Sharing
Std
. In
terf
ace
Gen. ProcessingS
td.
Inte
rface
Data
Control
Reports
Reporting
Obs. & Models Decision Support System
Web Services and Workflow for Loose Coupling
Service Broker
Service Provider
PublishFind
BindServiceUser
Web Service Interaction Service Chaining & Workflow
Domain ProcessingData Sharing
Std
. In
terf
ace
Gen. ProcessingS
td.
Inte
rface
Data
Control
Reports
Reporting
Obs. & Models Decision Support System
Web Services Triad:Publish – Find – Bind
Workflow Software:Dynamic Programming
Collaborative Reporting and Dynamic Delivery
Co Writing - Wiki
ScreenCast
Analysis Reports:
Information supplied by manyNeeds continuous program feedbackReport needs many authorsWiki technologies are for collaborative writing
Dynamic Delivery:
Much of the content is dynamicAnimated presentations are compellingMovies and screencasts are for dynamic delivery
Domain ProcessingData Sharing
Std
. In
terf
ace
Gen. ProcessingS
td.
Inte
rface
Data
Control
Reports
Reporting
Obs. & Models Decision Support System
Providers
NASA DAACs
EPA R&DModel
EPA AIRNow
others
Public
Manager
Scientist
Users
other
• The info system transforms the data into info products for each user • In the first stage the heterogeneous data are prepared for uniform access
Uniform Access
Agile Information System: Data Access, Processing and Products
• The second stage performs filtering, aggregation, fusion and other operations
Data Processing Web Service Chain
Custom Processing
SciFlo
DataFed
Info Products Reports, Websites
Forecasting
Compliance
Other
Sci. Reports
• The third stage prepares and delivers the needed info products
Approach: Mediation Between Users and Data Providers
DataFed assumes spontaneous, autonomous data providersNon-intrusively wraps datasets for access by web servicesMediates, homogenizes data views. e.g. geo-spatial, time...
ScientistScience
DAACs
• Current info systems are project/program oriented and provide end-to-end solutions
Info UsersData Providers Info System
AIRNowPublicAIRNow
ModelCompliance
Manager
‘Stovepipe’ and Federated Usage Architectures Landscape
• Part of the data resources of any project can be shared for re-use through DataFed
• Through the Federation, the data are homogenized into multi-dimensional cubes
• Data processing and rendering can then be performed through web services
• Each project/program can be augmented by Federation data and services
DataFed User Tools
– Data Catalog– Data Browser– PlumeSim, Animator– Combined Aerosol Trajectory Tool (CATT)
Consoles: Data from diverse sources are displayed to create a rich context for exploration and analysis
CATT: Combined Aerosol Trajectory Tool for the browsing backtrajectories for specified chemical conditions
Viewer: General purpose spatio-temporal data browser and view editor applicable for all DataFed datasets
Federated Datasets
• Data are accessed from autonomous, distributed providers• DataFed ‘wrappers’ provide uniform geo-time referencing• Tools allow space/time overlay, comparisons and fusion
Near Real Time Data IntegrationDelayed Data Integration
Surface Air Quality AIRNOW O3, PM25 ASOS_STI Visibility, 300 sitesMETAR Visibility, 1200 sitesVIEWS_OL 40+ Aerosol Parameters
SatelliteMODIS_AOT AOT, Idea ProjectGASP Reflectance, AOTTOMS Absorption Indx, Refl.SEAW_US Reflectance, AOT
Model OutputNAAPS Dust, Smoke, Sulfate, AOTWRF Sulfate
Fire DataHMS_Fire Fire PixelsMODIS_Fire Fire Pixels
Surface MeteorologyRADAR NEXTRADSURF_MET Temp, Dewp, Humidity…SURF_WIND Wind vectorsATAD Trajectory, VIEWS locs.
A Sample of Datasets Accessible through ESIP MediationNear Real Time (~ day)
It has been demonstrated (project FASTNET) that these and other datasets can be accessed, repackaged and delivered by AIRNow through ‘Consoles’
MODIS Reflectance
MODIS AOT TOMS Index
GOES AOT
GOES 1km Reflec
NEXTRAD Radar
MODIS Fire Pix
NRL MODEL
NWS Surf Wind, Bext
Web Services: Building Blocks of
DataFed Programming
Access, Process, Render Data by Service Chaining
NASA SeaWiFS Satellite
NOAA ATAD Trajectory
OGC Map Boundary
RPO VIEWS Chemistry
Data Access
Data Processing
Layer OverlayLAYERS
Web Service Composition
InteroperabilityWrappers and Adapters