{
  "@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 Yellowknife (62.52 deg GLat, 245.69 deg GLong): 256 x 256 pixel full resolution images of auroral oval.  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 a sun shades deploy to protect the CCD.",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "downloadURL": "http://themis.ssl.berkeley.edu/data/themis/thg/l1/asi/yknf/",
      "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_Yellowknife_ASI_full_PT3S",
      "format": "BIN",
      "mediaType": "application/octet-stream"
    },
    {
      "@type": "dcat:Distribution",
      "downloadURL": "https://hpde.io/NASA/NumericalData/THEMIS/Ground/Yellowknife/ASI/full_PT3S",
      "format": "BIN",
      "mediaType": "application/octet-stream"
    }
  ],
  "identifier": "https://doi.org/10.48322/9kf9-0617",
  "keyword": [
    "imageintensity"
  ],
  "landingPage": "https://doi.org/10.48322/9kf9-0617",
  "license": "https://www.usa.gov/government-works",
  "modified": "2026-09-08",
  "programCode": [
    "026:000"
  ],
  "publisher": {
    "@type": "org:Organization",
    "name": "THEMIS"
  },
  "theme": [
    "Heliophysics"
  ],
  "title": "Yellowknife THEMIS Ground-based All Sky Imager; Full Resolution Images."
}