A Comparison of Diode-Laser-Doppler Velocimeter and Medium Resolution Turbulence Cluster Measurements in MIZEX 84.

During the MIZEX 84 Experiment two prototype Diode-Laser-Doppler Velocimeters were tested in the oceanic boundary layer under a drifting ice floe. Part of the testing included a comparison of turbulent flow measured with the DLDV instruments and with a so-called Medium Resolution Cluster of small pa...

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Bibliographic Details
Main Author: McPhee, Miles G
Other Authors: MCPHEE RESEARCH CO YAKIMA WA
Format: Text
Language:English
Published: 1985
Subjects:
Test Facilities
Equipment and Methods
Fluid Mechanics
Physical and Dynamic Oceanography
*BOUNDARY LAYER
*SEA ICE
*TURBULENT FLOW
AXES
CLUSTERING
COMPARISON
DRIFT
DUCTS
FLOW
INVERSION
MASTS
MEASUREMENT
OCEANS
ORTHOGONALITY
RESOLUTION
ROTORS
STATISTICS
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA187561
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA187561
Description
Summary:During the MIZEX 84 Experiment two prototype Diode-Laser-Doppler Velocimeters were tested in the oceanic boundary layer under a drifting ice floe. Part of the testing included a comparison of turbulent flow measured with the DLDV instruments and with a so-called Medium Resolution Cluster of small partially ducted rotors mounted along orthogonal axes, used in a separate boundary-layer experiment. This report presents data from 15 runs in which the two systems, suspended on the same inverted mast but separated vertically by about half a meter, measured the flow simultaneously. One-second averages of the DLDV and MRC output are presented, along with statistics of flow measured by each system, direct comparison of the horizontal and 45-degree components, and autospectra and squared coherency calculated from each of 12 fourteen-minute runs. Overall, flow measurements made with the DLDV instruments compare favorably with those of the MRC.

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