2.5.0 spase://NASA/NumericalData/THEMIS/Ground/Taloyoak/ASI/thumb_PT3S THEMIS GBO All Sky Imager at Taloyoak, NT, Canada. ASI Thumbnails Data. THEMIS-Ground AST https://doi.org/10.48322/1m0a-ha51 2023-08-09T21:15:36Z 2023-06-30T13:00:00Z Made changes requested by F. Frey, Updated version. Added contact and DOI info. 2023-08-09T13:00:00Z Added Emma Spanswick to contacts. THEMIS Ground All Sky Imager at Taloyoak (69.54 deg GLat, 266.45 deg GLong): 32 x 32 pixel thumbnails for full ASI images. The ASI stations 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. The CCD has a resolution of 256 x 256 pixels. 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 sun shades deploy to protect the CCD. 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, and the CSA for logistical support in fielding and data retrieval from the GBO stations. Angelopoulos, V., Mende, S. B., Donovan, E., and Frey, H. U. 2023-01-01T00:00:00 University of California, Berkeley spase://SMWG/Person/Vassilis.Angelopoulos PrincipalInvestigator spase://SMWG/Person/Stephen.B.Mende CoInvestigator spase://SMWG/Person/Eric.Donovan CoInvestigator spase://SMWG/Person/Harald.U.Frey CoInvestigator spase://SMWG/Person/Emma.Louise.Spanswick CoInvestigator THEMIS Summary Plots http://themis.ssl.berkeley.edu/gbo/display.py?view_type=summary Summary plots containing ASI thumbnail images; useful for determining when ASI data exists. spase://VMO/NumericalData/THEMIS/Ground/UCLA-GBO/TALO/ASI/thumb_PT3S spase://VSPO/NumericalData/THEMIS/Ground/Taloyoak/ASI/thumb_PT3S spase://SMWG/Repository/UCB/THEMIS Online Open THEMIS Web Data http://themis.ssl.berkeley.edu/data/themis/thg/l1/asi/talo/ CDF None spase://SMWG/Instrument/THEMIS/Ground/UCLA-GBO/TALO/ASI ImageIntensity 2009-01-15T23:00:00 -P1Y PT3S thg_ast_talo thg_ast_talo Thumbnail images of 32x32 pixels; saturation counts for each pixel. counts 32 32 Scalar Intensity thg_ast_talo_column thg_ast_talo_column Image column number; x-dimension, image width. 32 Other thg_ast_talo_row thg_ast_talo_row Image row number; y-dimension, image height. 32 Other thg_ast_talo_time thg_ast_talo_time thg_ast_talo_time, UTC, in seconds since 01-Jan-1970 00:00:00 Not including leap seconds s 0.0 5.0E9 NaN Temporal 2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/THEMIS/Ground/Taloyoak/ASI/thumb_PT3S NASA NumericalData THEMIS GBO All Sky Imager at Taloyoak, NT, Canada. ASI Thumbnails Data. THEMIS-Ground AST https://doi.org/10.48322/1m0a-ha51 2025-12-04T13:32:02Z 2023-06-30T13:00:00Z Made changes requested by F. Frey, Updated version. Added contact and DOI info. 2023-08-09T13:00:00Z Added Emma Spanswick to contacts. 2025-08-05T13:12:52Z Added ObservedRegion(s). Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to value in Version tag. ZCB 2025-09-30T14:25:24Z Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. ZCB 2025-12-04T13:32:02Z Added MetadataRightsList. Updated to 2.7.1. ZCB THEMIS Ground All Sky Imager at Taloyoak (69.54 deg GLat, 266.45 deg GLong): 32 x 32 pixel thumbnails for full ASI images. The ASI stations 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. The CCD has a resolution of 256 x 256 pixels. 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 sun shades deploy to protect the CCD. 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, and the CSA for logistical support in fielding and data retrieval from the GBO stations. Angelopoulos, V., Mende, S. B., Donovan, E., and Frey, H. U. 2023-01-01T00:00:00 Space Sciences Laboratory spase://SMWG/Person/Vassilis.Angelopoulos PrincipalInvestigator spase://SMWG/Person/Stephen.B.Mende CoInvestigator spase://SMWG/Person/Eric.Donovan CoInvestigator spase://SMWG/Person/Harald.U.Frey CoInvestigator spase://SMWG/Person/Emma.Louise.Spanswick CoInvestigator THEMIS Summary Plots http://themis.ssl.berkeley.edu/gbo/display.py?view_type=summary Summary plots containing ASI thumbnail images; useful for determining when ASI data exists. spase://VMO/NumericalData/THEMIS/Ground/UCLA-GBO/TALO/ASI/thumb_PT3S spase://VSPO/NumericalData/THEMIS/Ground/Taloyoak/ASI/thumb_PT3S spase://SMWG/Repository/UCB/THEMIS Online Open THEMIS Web Data http://themis.ssl.berkeley.edu/data/themis/thg/l1/asi/talo/ CDF None spase://SMWG/Instrument/THEMIS/Ground/UCLA-GBO/TALO/ASI ImageIntensity 2009-01-15T23:00:00 -P1Y PT3S Earth.NearSurface.Ionosphere Earth.Surface thg_ast_talo thg_ast_talo Thumbnail images of 32x32 pixels; saturation counts for each pixel. counts 32 32 Scalar Intensity thg_ast_talo_column thg_ast_talo_column Image column number; x-dimension, image width. 32 Other thg_ast_talo_row thg_ast_talo_row Image row number; y-dimension, image height. 32 Other thg_ast_talo_time thg_ast_talo_time thg_ast_talo_time, UTC, in seconds since 01-Jan-1970 00:00:00 Not including leap seconds s 0.0 5.0E9 NaN Temporal