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3-D mapping of sea ice draft with an autonomous underwater vehicle
Entry ID: SIPEX_II_AUV

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Summary
Abstract: We set out to achieve floe-scale 3-D mapping of sea ice draft and bio-optical parameters using a Multibeam SONAR and Hyperspectral radiometer mounted to an Autonomous Underwater Vehicle (AUV). The AUV utilised was the 'JAGUAR' Seabed-class vehicle from the Deep Submergence Laboratory at the WoodsHole Oceanographic Institution.

The AUV comes with a CTD and ADCP. However these are not deployed as scientific sensors and therefore are unsupported in terms of metadata. In particular the CTD was not calibrated before or during the voyage.

The AUV used a LongBaseLine system formed by three transponders to navigate to and from the survey grid. Two were located on the ice and the third was deployed from the back of the ship with an acoustic communications modem. Once at the survey grid beneath the sea ice, the AUV used the DVL to navigate using bottom-tracking of the underside of the sea ice.

We conducted 4 missions beneath sea-ice during the SIPEX-II voyage.

The current status of the data is that is in un-processed and unavailable until final processing is completed in 2013.

Persons interested in the data should contact Dr Guy Williams directly for further information and preliminary figures relating to the AUV missions.

The files currently in the archive are in raw form. Some preliminary data is provided for stations 2, 3, 4 and 6 as:

floe-2-20120926.mat
floe-3-20121003.mat
floe-4-20121006.mat
floe-6-20121013.mat

These can be accessed using the Seabed_plot routines (MATLAB) in this folder.

There is a readme file provided called what-is-this.txt


Also included is the video footage taken from the AUV using a GoPro HD Hero.
Video Codec: avc1
Resolution: 1920x1080 pixels
Frame Rate: 29.970030 f/s
Audio Codec: mp4a
Audio Bitrate: 1536 kb/s

Finally, plots of the data for ice stations 2,3,4 and 6 are included in the preliminary figures folder. The file names indicate which ice station the plots are from.

Related URL
Link: GET DATA
Description: Download point for the data


Link: VIEW PROJECT HOME PAGE
Description: Public information for ASAC project 4073


Link: VIEW RELATED INFORMATION
Description: Citation reference for this metadata record and dataset


Parent DIF
This description is a member of a collection. The collection is described in
SIPEX_II


Geographic Coverage
 N: -60.0 S: -65.0  E: 125.0  W: 115.0

Temporal Coverage
Start Date: 2012-09-28
Stop Date: 2012-09-28

Start Date: 2012-10-04
Stop Date: 2012-10-04

Start Date: 2012-10-07
Stop Date: 2012-10-07

Start Date: 2012-10-13
Stop Date: 2012-10-13


Location Keywords
OCEAN > SOUTHERN OCEAN
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
CRYOSPHERE >SEA ICE    [Definition]
OCEANS >SEA ICE    [Definition]


ISO Topic Category
ENVIRONMENT
OCEANS


Platform
R/V AA >R/V Aurora Australis
AUVS >Autonomous Underwater Vehicles    [Information]


Quality
The multibeam data from Station 20120926 was affected by incorrect deployment settings that reduced the available swath and overall integrity of the final map out and along a single transect of the grid.

Ultimately there will be single MATLAB files associated with each of the stations. i.e. 20120926.mat

These will contain raw and processed data for
a) Engineering
b) Navigation (AUV and GRID coordinate systems)
c) Coordinate system information
d) Multibeam
e) Hyperspectral
f) CTD
g) ADCP


Access Constraints
These data are not yet publicly available.


Use Constraints
This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SIPEX_II... when using these data.

This project was directly cash funded by the ACECRC, in collaboration with WHOI. It is mandatory that both organisations are represented in the author-list of any publication that directly uses this data.


Keywords
SIPEX


Data Set Progress
IN WORK


Originating Center
Australian Antarctic Division


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 270 MB
Distribution_Format: matlab
Fees: Free


Personnel
GUY DARVALL WILLIAMS
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Fax: +61 3 6226 2973
Email: guy.darvall.williams at gmail.com
Contact Address:
ACE CRC
Private Bag 80
University of Tasmania
City: Hobart
Province or State: Tasmania
Postal Code: 7001
Country: Australia


CLAY KUNZ
Role: TECHNICAL CONTACT
Phone: +1 508 289 3566
Email: ckunz at whoi.edu
Contact Address:
Applied Ocean Physics and Engineering
Woods Hole Oceanographic Institution
266 Woods Hole Road
City: Woods Hole
Province or State: MA
Postal Code: 02543-1050
Country: USA


PETER KIMBALL
Role: TECHNICAL CONTACT
Phone: +1 508 289 2429
Email: pkimball at whoi.edu
Contact Address:
Applied Ocean Physics and Engineering
Woods Hole Oceanographic Institution
266 Woods Hole Road
City: Woods Hole
Province or State: MA
Postal Code: 02543-1050
Country: USA


ROWAN FROST
Role: TECHNICAL CONTACT
Email: rfrost at utas.edu.au
Contact Address:
Australian Maritime College
University of Tasmania
City: Launceston
Province or State: Tasmania
Postal Code: 7250
Country: Australia


POLLY ALEXANDER
Role: TECHNICAL CONTACT
Email: polly.alexander at csiro.au
Contact Address:
CSIRO
Country: Australia



Creation and Review Dates
DIF Creation Date: 2013-01-09
Last DIF Revision Date: 2016-01-27



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