Correcting the Ice Draft Data from the SCICEX '98 Cruise

A solution is presented for correcting the ice draft data collected by the Digital Ice Profiling System (DIPS) from the first half of the SCICEX '98 cruise. The ice draft measurements are intrinsically related to the depth of the submarine and were corrupted by faulty measurements of depth. The...

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Bibliographic Details
Main Authors: Dickinson, S., Wensnahan, M., Maykut, G., Rothrock, D.
Other Authors: WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Format: Text
Language:English
Published: 2002
Subjects:
Physical and Dynamic Oceanography
Geography
*ARCTIC OCEAN
*HYDROGRAPHIC SONAR
CONVERSION
DIGITAL SYSTEMS
TIME DEPENDENCE
DEPTH
ICE
PRESSURE
PACKAGING
SUBMARINE DETECTION
SEA ICE
SUBMARINE SIGNATURES
SCICEX 98 CRUISE
UPWARD LOOKING SONAR
Arctic
Arctic Ocean
SCICEX
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA403470
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA403470
Description
Summary:A solution is presented for correcting the ice draft data collected by the Digital Ice Profiling System (DIPS) from the first half of the SCICEX '98 cruise. The ice draft measurements are intrinsically related to the depth of the submarine and were corrupted by faulty measurements of depth. The ship's digital depth detector measured the gross movements of the submarine, but was unresponsive to small changes in depth associated with the natural porpoising of the boat. This porpoising, which is a periodic vertical movement of the submarine of several feet, was transferred to the ice draft data. An independent sensor package, the Icecat2, collected pressure data, which were converted to depth. The DIPS and Icecat2 systems had different clocks. To align them the depth signatures from each system were compared during large, rapid descents of the submarine. A time-dependent time offset between the two clocks was computed. By removing the DIPS depths from the ice draft measurements and replacing them with the depths measured by the Icecat2 system, the ice draft data were corrected. --Original contains color plates: All DTIC reproductions will be in black and white.

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