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