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

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Presentation transcript:

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

Outline of This Presentation 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 –system integration –data system –major procurements –Operation Arctic Submarine Laboratory –SCICEX liaison –TEMPALTs Hawaii Mapping Research Group, University of Hawaii –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

SCAMP Operations Proposals and briefings (a lot) Installation ‘97 Testing SCICEX ‘98 Remedial effort SCICEX ‘99 Removal SCICEX 1999 SCICEX 1998 March - MayAug. - 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

Moraines Scours Hawkbill Nadir Deep ice contact features

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?

PORT STBD SCAMP Looks Upward

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: SCAMP: SCAMP Swath Bathy Processing: