Antarctic Auroral Imaging


Dataset Identification:

Resource Abstract:
Abstract: Auroral protons are not energized by electric fields directly above the auroral atmosphere and therefore they are a much better diagnostic of processes deep in the magnetosphere. It has been shown from measurements from space by the IMAGE spacecraft that the dayside hydrogen emission is directly related to dayside reconnection processes. A four channel all-sky images had been operating at South Pole during 2004-2007 to observe auroral features in specific wavelengths channels that allowed a quantitative investigation of proton aurora. This was accomplished by measuring the Hydrogen Balmer beta line at 486.1 nm and by monitoring another wavelength band for subtracting non proton produced background emissions. South Pole allows these measurements because of the 24 hour darkness and favorable conditions even on the dayside. To increase the scientific return it was also attempted to measure the Doppler shift of the hydrogen emissions because that provides diagnostics regarding the energy of the protons. Thus the proton camera measured 3 wavelength bands simultaneously in the vicinity of the Balmer beta line to provide the line intensity near zero Doppler shift, at a substantial Doppler shift and a third channel for background. The 4-channel all-sky camera at South Pole was modified in 2008 in order to observe several types of auroras, and to distinguish the cusp reconnection aurora from the normal plasma sheet precipitation. The camera simultaneously operates in four wavelength regions that allow a distinction between auroras that are created by higher energy electrons (greater than 1 keV) and those created by low energy (less than 500 eV) precipitation. The cusp is the location where plasma enters the magnetosphere through the process of magnetic reconnection. This reconnection occurs where the Interplanetary Magnetic Field (IMF) and the terrestrial magnetic field are oriented in opposite directions. The data are represented as keograms (geomagnetic north-south slices through the time series of images) for the four different wavelengths. The top of the keogram points to the magnetic south pole. The time series allows a very quick assessment about the presence of aurora, motion, intensity, and brightness differences in the four simultaneously registered channels.
Citation
Title  Antarctic Auroral Imaging
publication date 2008
cited responsible party - author
individual Name  Frey, Harald
organisation Name  University of California-Berkeley, Berkeley, CA, 94720, US
Contact information
No address provided.
Linkage for online resource
URL: http://orcid.org/ORCID:0000-0001-8955-3282
protocol  ORCID
cited responsible party - author
individual Name  Mende, Stephen
organisation Name  University of California-Berkeley, Berkeley, CA, 94720, US
Contact information
Postal Address:
electronic Mail Address: mende@ssl.berkeley.edu
Linkage for online resource
URL: http://orcid.org/ORCID:0000-0001-5511-3668
protocol  ORCID
cited responsible party - publisher
organisation Name  U.S. Antarctic Program (USAP) Data Center
No contact information provided.
Topic Category:   climatologyMeteorologyAtmosphere
Keywords:
Resource language:   eng
Resource progress code:   Complete
Constraints on resource usage:
Constraints
Use limitation statement:
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC BY-NC-SA 3.0]
Constraints on resource usage:
Legal Constraints
Access Constraints   license
Other constraints
Creative Commons Attribution-NonCommercial-Share Alike 3.0 United States [CC BY-NC-SA 3.0]
Constraints on resource usage:
Security Constraints
Classification  unclassified
Resource extent
Credits:
funderName:NSF:GEO:PLR:Antarctic Astrophysics and Geospace Sciences awardNumber:0636899 awardTitle:Antarctic Auroral Imaging
point of contact - pointOfContact
individual Name  Frey, Harald
organisation Name  University of California-Berkeley, Berkeley, CA, 94720, US
Contact information
No address provided.
Linkage for online resource
URL: http://orcid.org/ORCID:0000-0001-8955-3282
protocol  ORCID
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Digital Transfer Options
Linkage for online resource
name  Landing Page
URL: http://dx.doi.org/10.15784/600070
protocol  WWW:LINK-1.0-http--link
link function  information
Description  Link to DOI landing page or data facility landing page if no DOI is assigned.
Linkage for online resource
name  landing page
URL: http://www.usap-dc.org/view/dataset/600070
protocol  WWW:LINK-1.0-http--link
link function  information
Description  Link to a web page related to the resource.
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Metadata Information

Metadata data stamp:  2018-05-17
Resource Maintenance Information
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notes:  This metadata record was generated by an xslt transformation from a DataCite metadata record; The transform was created by Damian Ulbricht and Stephen M. Richard. 2017-11-15 these records include new IEDA keywords for geoportal facets Run on 2018-06-21T19:05:24-07:00
Metadata contact - pointOfContact
organisation Name  Interdisciplinary Earth Data Alliance
Contact information
Postal Address:
electronic Mail Address: web@usap-dc.org
Linkage for online resource
URL: http://www.usap-dc.org/static/imgs/header/usaplogo.png
link function  browseGraphic
Metadata scope code  dataset
Metadata hierarchy level name:  Dataset
Metadata language   eng
Metadata character set encoding:   utf8
Metadata standard for this record:  ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:  2007
Metadata record identifier:  urn:ieda:metadataabout:10.15784-600070
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Metadata record format is ISO19139 XML (MD_Metadata)