{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "NASA Space Physics Data Facility", "hasEmail": "mailto:NASA-SPDF-Support@nasa.onmicrosoft.com"}, "description": "THEMIS Ground All Sky Imager at Sanikiluaq (56.54 deg GLat, 280.77 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.", "distribution": [{"@type": "dcat:Distribution", "downloadURL": "http://themis.ssl.berkeley.edu/data/themis/thg/l1/asi/snkq/", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "http://themis.ssl.berkeley.edu/gbo/display.py?view_type=summary", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "https://helio.data.nasa.gov/dataset/THEMIS_Ground_Sanikiluaq_ASI_thumb_PT3S", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "https://hpde.io/NASA/NumericalData/THEMIS/Ground/Sanikiluaq/ASI/thumb_PT3S", "format": "BIN", "mediaType": "application/octet-stream"}], "identifier": "https://doi.org/10.48322/6fpv-6g31", "keyword": ["imageintensity"], "landingPage": "https://doi.org/10.48322/6fpv-6g31", "license": "https://www.usa.gov/government-works", "modified": "2026-08-10", "programCode": ["026:000"], "publisher": {"@type": "org:Organization", "name": "THEMIS"}, "theme": ["Heliophysics"], "title": "THEMIS GBO All Sky Imager at Sanikiluaq, NU, Canada. ASI Thumbnails Data."}