Transcript Document

Underground Facility Analysis Center
Military Geophysics
Mr. Gunnar J. Radel, PE
14 June 2011
This briefing is classified
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Underground Facility Analysis Center
Agenda
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Applications
Key geophysical sensing needs
Key geophysical analytic needs
Challenges
Lessons learned
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Underground Facility Analysis Center
Applications
 Treaty monitoring
 Battlespace awareness
 Land (and below), sea, air
 Detect, locate, characterize
 Clandestine tunnel detection
 Broad, low resolution detection
 Moderate resolution location
 High fidelity local interrogation
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Key Geophysical Sensing Needs
 Sensing in a non-lab environment
 DoD does not typically build vaults
 Sensor networks
 Common communications
 Pre-processing on node prior to exfil
 Size and power matter
 Trade-offs (minimize reduction in sensitivity or bandwidth)
 More robust and resilient sensors
 No reduction in sensitivity
 Example: sensitivity locked until sensor is in place
 Stability
 Sensors that do not require frequent or lengthy calibrations
 No soaker hoses
 Noise cancellation versus isolation
 Advanced sensor concepts for noise reduction
 Common GPS time for all
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Key Geophysical Analysis Needs
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Depth of seismic sources
 Without placing sensor over the top of the source
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Integrated infrasound and meteorological data
Rapid computation, interpretation of local & regional synthetics
 Helps most with moving networks
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Workflow optimized analytical environment
More tsunamigenic source function and propagation work
Cross-domain data fusion (no single geophysical method is applicable
everywhere)
 Seismic (active and passive)
 Acoustic, Infrasound
 Electromagnetic Induction
 Resistivity
 Ground penetrating radar
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Global database of future sensor deployments
Direct download of .css data files
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Versus seed format download and unpack
Sirles, et. al: “Advancements In
Subsurface Modeling Using Seismic
Refraction Data”, SAGEEP 2006.
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Geotechnical Challenges & Factors
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Chaos
Material (clays, magnetite, salt)
Faults, fractures, joints, bedding, paleochannels
Groundwater level
Seismic velocity
Conductivity
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Environmental Challenges & Factors
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Vegetative cover
Terrain
Rain
Space available
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Man-made Clutter Challenges & Factors
 Urban chaos
 Utilities
 Underground
 Power, Telephone, Cable
 Water, Sewer, Gas
 Stray current
 Overhead - Power
 Vehicles
 Structures, Fences
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Lessons Learned
(Field Horror Stories)
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Changing batteries
Pulling data cards
Equipment quantity and logistics
Planning
Weather
Animal life
Self interference & friendly fire
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Questions?
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