Transcript Seafloor Characterization And Mapping Pods (SCAMP) Underway Geophysical Survey From Submarines in the Arctic Dale Chayes, L-DEO/CU.

Seafloor Characterization And
Mapping Pods (SCAMP)
Underway Geophysical Survey
From Submarines in the Arctic
Dale Chayes, L-DEO/CU
Outline of This Presentation
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What is SCAMP
History of SCAMP
Results from SCAMP
Future opportunities
– Underway survey in the Arctic
– SCAMP
– Ice canopy mapping
SCAMP Concept
“Velcro” modern mapping sonars onto a nuclear submarine:
Swath Bathymetry, Subbottom Profiler, Gravity Meter
SCAMP Collaborators
• Lamont-Doherty Earth
Observatory of
Columbia University
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system integration
data system
major procurements
Operation
• Arctic Submarine
Laboratory
– SCICEX liaison
– TEMPALTs
• Hawaii Mapping
Research Group,
University of Hawaii
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SSBS software
Installation assistance
operation support
SSBS data processing
• Tulane (now UAF)
– HRSP processing
SCAMP Major Contractors
• Johns Hopkins Applied
Physics Lab
– Installation and
TEMPALT support
– Design and fabrication
• General Dynamics
Electric Boat Div.
– Installation and
TEMPALT support
– Design and fabrication
• Raytheon Systems
– SSBS electronics &
arrays
• Ocean Data Equipment
Corp
– HRSP system
• Norfolk Naval Shipyard
– Design assistance
– Diving services
SCICEX 1999
March - May
SCAMP
Operations
• Proposals and
briefings (a lot)
• Installation ‘97
• Testing
• SCICEX ‘98
• Remedial effort
• SCICEX ‘99
• Removal
SCICEX 1998
Aug. - Sept.
Installation
SCAMP
Results
• Active volcanism in
the Gakkel Ridge
• Deep ice contact
features
• New bathymetry
Figures courtesy of:
Margo Edwards
Greg Kurras
Jim Cochran
Maya Tolstoy
Lenonid Polyak
Bernard Coakley
Operations:
Jay Ardai
Dale Chayes
Mark Rognstad
Deep ice contact features
Moraines
Hawkbill Nadir
Scours
Deeper ice contact features
Submarines are ideal
underway survey platforms in
the Arctic
• Independent of the ice canopy
• Stable, quiet, and maneuverable
• More miles per day (> 4x) than surface
ships
• Reconnaissance sonar survey more
efficient (> 7X ) than surface ships
Phase Coherent Returns in
the Blanking Interval?
SCAMP Looks Upward
PORT
STBD
Ice Draft Measurements (1)
• Historical archive of 637 DIPS data
– New submarines have different sonars
– Cross calibration is required
• Improved (Swath) Options:
– Mature (seafloor technology)
– Significantly improved spatial coverage
– Adds spatial distribution and texture
Ice Draft Measurements (2)
• The trans-arctic track is parallel to the
slope of the thickness gradient
• Small errors in navigation, season or ice
draft confound the observations
– Add a cross track line to submarine cruises
References
• SCICEX Web Page:
www.ldeo.columbia.edu/SCICEX
• SCAMP:
www.ldeo.columbia.edu/SCICEX/SCAMP
• SCAMP Swath Bathy Processing:
www.soest.hawaii.edu/HMRG/