TemperateReefBase Geonetwork Catalogue
A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices
Metadata record for data from ASAC Project 1342
See the link below for public details on this project.
---- Public Summary from Project ----
This project involves field trialling of software written as part of ASAC project 1212 (2000-2001) to determine sea-ice thickness in real-time from ship-borne electromagnetic induction measurements. Computer simulation of ship- and helicopter-borne electromagnetic induction measurements over realistic sea-ice structures will also be performed in order to assess the suitability and cost-effectiveness of helicopter-mounted systems for future Antarctic sea-ice thickness measurements.
Equipment used in this study were the IBEO PS100 infrared laser altimeter and the Geonics EM31 geophysical electromagnetic induction device.
The fields in this dataset are:
DAY is Julian day
TIME is in seconds after midnight (UTC).
LASER is the laser altitude above the snow/ice (metres). A zero reading
indicates no return (open water).
PITCH is pitch of the system in degrees.
ROLL is roll of the system in degrees.
COND-A is analogue conductivity from the EM31 (not used).
PHASE-A is analogue in-phase response from the EM31 (not used).
COND is the estimated depth to seawater (metres) from the EM31-ICE processing module.
PHASE is the EM31 in-phase response (expressed as parts per thousand of the primary field). A value of 9.99 indicates the magnetic field was too large to be recorded.
SITE
LATITUDE
LONGITUDE
SNOW THICKNESS
ICE THICKNESS
FREEBOARD
a is the electrode spacing.
R is the measured resistance.
Rho is the apparent conductivity (not true conductivity) = 2 aR.
CONDUCTIVITY = 1/Rho.
Simple
Identification info
- Alternate title
- A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices
- Date (Publication)
- 2003-12-01
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.4225/15/55E8FEBE1952E
Originator
Publisher
Principal investigator
Collaborator
- Name
- CAASM Metadata
- Status
- Completed
Custodian
- Topic category
-
- Oceans
Extent
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 2001-09-30 2002-03-31
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > OCEANS > SEA ICE > ICE DEPTH/THICKNESS
- Keywords
-
- A
- ANTARCTICA
- COND
- COND-A
- CONDUCTIVITY
- DAY
- FREEBOARD
- ICE THICKNESS
- LASER
- LATITUDE
- LONGITUDE
- PHASE
- PHASE-A
- PITCH
- R
- RHO
- ROLL
- SEA ICE
- SITE
- SNOW THICKNESS
- SOUTHERN OCEAN
- TIME
- NASA/GCMD Earth Science Keywords
-
- Altimeters
- NASA/GCMD Earth Science Keywords
-
- Aircraft
- SHIPS
- NASA/GCMD Earth Science Keywords
-
- AMD/AU
- CEOS
- AMD
- NASA/GCMD Earth Science Keywords
-
- OCEAN > SOUTHERN OCEAN
- CONTINENT > ANTARCTICA
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- These data are publicly available for download from the provided URL.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference at the provided http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1342 when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Planned available datetime
- 2003-12-01T00:00:00
- Units of distribution
- kb
- Transfer size
- 41232
- OnLine resource
-
GET DATA
Download point for the data.
- OnLine resource
-
PROJECT HOME PAGE
Public information for ASAC project 1342
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset
Resource lineage
- Statement
- The PS100 laser altimeter used for these measurements was found to operate incorrectly in conditions of bright sunlight. Raw laser altimeter data contains numerous spurious values. An edited dataset is currently being created. Average sea ice floe size was encountered during the voyage was ~20-40 m. Patches of open water between floes adversely affect EM ice thickness measurements. Some sea ice was too thick to be measured by the EM instrument. An edited dataset containing acceptable sea ice thickness values is currently being created. Values provided in temporal coverage are approximate only.
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2015-09-04 - record updated by Dave Connell. They sing updates.
Metadata
- Metadata identifier
- string/ASAC_1342
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Owner
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- d57562cf-20f1-416b-993b-70457b5d1017
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2015-11-29T18:21:38
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/ASAC_1342
Point of truth for the metadata record
- Date info (Creation)
- 2001-04-09T00:00:00
- Date info (Last Update)
- 2017-04-26
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile
Overviews
Spatial extent
Provided by
