Infrasound Data: Assets, Availability, Access Roger Bowman and Robert Woodward Second NSF Infrasound

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Infrasound Data Assets, Availability, Access
Roger Bowman and Robert Woodward Second NSF
Infrasound WorkshopJune 8, 2005 

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Overview

• US Army SMDC Monitoring Research Program
• Supports the RD community through the Research
  and Development Support Services (RDSS) project
• The RDSS provides
• Waveform archive
• Extensive infrasound waveform data (1995
  present)
• Seismic data
• Hydroacoustic data
• Event bulletins
• Prototype IDC products (1995-2000)
• IDC products (2000-present) this function is
  migrating to the US NDC
• Research databases
• Research tools
• This presentation provides an overview of
  infrasound-related RDSS products and services

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Infrasound Data Assets

• Archiving data from 34 stations
• We provide a complete archive of these data
• Instant access to archived data (local and
  remote)
• Web-based tools for viewing and downloading data

I57US
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Data Storage

• The entire 14 Terabyte waveform archive is on
  spinning disk
• Infrasound
• Seismic
• Hydroacoustic
• Benefits
• Rapid data access
• Two orders of magnitude improvement in access
  speed relative to tape-based system
• Data anywhere in the archive may be accessed in
  seconds
• Facilitates new data access tools
• Instant downloads
• Waveform browsing
• Data stored in analysis ready format

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Data Availability
Yearly

• Interactive view of data holdings, via web site
• Yearly
• Monthly
• Daily
• Hourly
• Infrasound data from 1995 to the present

Monthly
Daily
Hourly
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Dynamic Data Browsing

• Interactive viewing of all data holdings
• Web based
• Standard web-browsers with no client-side
  modifications, no software to download
• Completely dynamic (not just static pictures)
• Fast!

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Data Downloads
Refine Request

• Access to all data in archive (every sample!)
• Infra, seismic, hydro
• CSS3.0 and SAC formats

View Waveforms
Download Waveforms
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Data Downloads (2)
Select Event

• Short cut requests for bulletin events
• User defined events
• Calendarbased time selection
• Arbitrary stations/times

Refine Request
Download Waveforms
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Monthly Infrasound Status Report and Web Site

• E-mail monthly status report
• Companion web site
• Network maps
• Data summary plots
• Station metadata

Data Metadata
Web Sitewww.rdss.info/infrastat
E-mailed Report
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Station Metadata
Wind Filter Parametric Metadata

• Major effort to assemble a comprehensive DB of
  station metadata
• Parametric metadata
• Location
• Calibration/response
• Instrument type
• Wind filters
• Environmental metadata
• Vegetation
• Terrain
• Review of data and metadata to identify errors
• Inconsistent units
• Mismatched calibration epochs
• Etc.

Terrain and Land Cover Environmental Metadata for
I34MN
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Validating Metadata

• Example of metadata validation
• Compute
• RMS pressure
• RMS wind
• Median wind direction
• One month intervals
• Examine data quality, range, etc.

wind direction
wind speed
micropressure
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Support for Data-Intensive Computing

• Entire data archive resides on a 14Tb spinning
  disk mass-store system
• Data are stored in analysis-ready format (CSS3.0)
• A remotely accessible UNIX server provides direct
  access to the entire data archive
• Host has Oracle access, Matlab, compilers
• Supports data-intensive computations
• Upload code rather than downloading data
• Example Milton Garces uploaded his code to this
  machine and is processing multiple station-years
  of data
• Software accesses data in same manner as if data
  are staged on a local disk

14 Tb Mass-Storage System
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Infrasound Database
Historical and Modern Infrasound Recording
Locations

• Database of special events and waveforms to
  support research activities
• Database content
• 31 nuclear explosions
• 10 chemical explosions
• 7 bolides/fireballs
• Expanding infrasound database in 2005
• Growing network enables us to add important new
  events

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Conclusions

• Extensive infrasound data archive
• Open site at http//www.rdss.info
• Some data and products only available via the
  restricted web site
• https//www.rdss.info
• IMS confidentiality restrictions
• Quality controlled metadata
• Tools and services
• Interactive data availability
• Waveform browsing
• Instant data downloads
• Data intensive computing
• Research databases