Error Analysis of Real-Time Remotely Sensed Microwave Sea-Ice Motions in the Western Arctic Ocean

An algorithm used to composite SSM/I 85.5 GHz imagery and derive sea ice motion was adapted for operational testing at Fleet Numerical Meteorology and Oceanography Command (FNMOC). A feature tracking technique was applied to a 6-month period, with data provided by FNMOC and the Naval Research Labora...

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Bibliographic Details
Main Author: Carsten, David M.
Other Authors: NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Format: Text
Language:English
Published: 2000
Subjects:
Physical and Dynamic Oceanography
Snow
Ice and Permafrost
Miscellaneous Detection and Detectors
*REMOTE DETECTION
*SEA ICE
*MICROWAVE OPTICS
ALGORITHMS
REAL TIME
THESES
ERROR ANALYSIS
SONOBUOYS
OCEANOGRAPHY
ARCTIC OCEAN
IN SITU ANALYSIS
*SSMI(SPECIAL SENSOR MICROWAVE IMAGERS)
Arctic
Arctic Ocean
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA386446
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA386446
Description
Summary:An algorithm used to composite SSM/I 85.5 GHz imagery and derive sea ice motion was adapted for operational testing at Fleet Numerical Meteorology and Oceanography Command (FNMOC). A feature tracking technique was applied to a 6-month period, with data provided by FNMOC and the Naval Research Laboratory (NRL). Ice motions are detectable using the SSM/I motion algorithm, and fields of SSM/I motion vectors are qualitatively consistent with coincident fields of in situ buoy motion vectors. Accuracy of the SSM/I motion vectors relative to buoy motion vectors increase significantly with buoy speed. No correlation between SSM/I and buoy motion vectors is observed for speeds below 3 cm/s and correlation increases significantly above 5 cm/s. The results are very sensitive to compositing techniques used to combine SSM/I passes into a single sea ice representation. FNMOC data was composited using a "drop-in-the-bucket" technique while NRL data was composited by a bilinear interpolation technique. Significantly poorer results were found with ENMOC composited data.

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