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THEMIS Ground-based All Sky Imager Level-0 Images

(2025). THEMIS Ground-based All Sky Imager Level-0 Images [Data set]. University of California, Berkeley.

ResourceID
spase://NASA/NumericalData/THEMIS/Ground/ASI/PT3S

Description

This data set at the THEMIS Mission Data website at University of California, Berkeley contains full resolution Level-0 Ground All Sky Images of the white light aurora for all observatories in North America. The ASI stations each monitor a 170 degree field of view imaging the auroral oval at kilometer resolution. The ASI is comprised of a fisheye lens and CCD in a stainless steel enclosure topped with a transparent acrylic dome. Exposure control ranges from 5 s to 1 ms although the typical data rate is one image every 3 seconds. Silicone heaters keep the instrument within the nominal temperature range. During daylight hours a sun shades deploy to protect the CCD.

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Details

Version:2.7.1

MetadataRightsList

Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/THEMIS/Ground/ASI/PT3S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
THEMIS Ground-based All Sky Imager Level-0 Images
AlternateName
THEMIS-Ground ASI Images
ReleaseDate
2025-12-04 13:31:47Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:29Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:03:08Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:31:47Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
Description

This data set at the THEMIS Mission Data website at University of California, Berkeley contains full resolution Level-0 Ground All Sky Images of the white light aurora for all observatories in North America. The ASI stations each monitor a 170 degree field of view imaging the auroral oval at kilometer resolution. The ASI is comprised of a fisheye lens and CCD in a stainless steel enclosure topped with a transparent acrylic dome. Exposure control ranges from 5 s to 1 ms although the typical data rate is one image every 3 seconds. Silicone heaters keep the instrument within the nominal temperature range. During daylight hours a sun shades deploy to protect the CCD.

Acknowledgement
We acknowledge NASA contract NAS5-02099 and V. Angelopoulos for use of data from the THEMIS Mission. Specifically S. Mende and E. Donovan for use of the ASI data, the CSA for logistical support in fielding and data retrieval from the GBO stations, and Canada Foundation for Innovation.
PublicationInfo
Authors
Angelopoulos, Vassilis; Mende, Stephen B.; Donovan, Eric
PublicationDate
2025-11-14 16:03:08Z
PublishedBy
University of California, Berkeley
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Vassilis.Angelopoulos
2.CoInvestigatorspase://SMWG/Person/Stephen.B.Mende
3.CoInvestigatorspase://SMWG/Person/Eric.Donovan
PriorIDs
spase://VSPO/NumericalData/THEMIS/Ground/ASI/PT3S
spase://VSPO/NumericalData/THEMIS/Ground/ASI/PT3S
AccessInformation
RepositoryID
spase://SMWG/Repository/UCB/THEMIS
Availability
Online
AccessRights
Open
AccessURL
Name
Plots, CDF files, and listings from UCB
URL
http://themis.ssl.berkeley.edu/data/themis/thg/l0/asi/
Description

Web access to ASK data.

Format
CDF
Encoding
None
InstrumentIDs
spase://SMWG/Instrument/THEMIS/Ground/UCLA-GBO/CHBG/ASI
spase://SMWG/Instrument/THEMIS/Ground/CANMAG/ATHA/ASI
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2005-01-01 01:00:00
RelativeStopDate
-P7D
Cadence
PT3S
ObservedRegion
Earth.Surface