THEMIS GBO All Sky Imager at Yellowknife, NT, Canada. ASI Thumbnails Data ...

• Main Authors: Angelopoulos, Vassilis, Mende, Stephen B, Donovan, Eric, Frey, Harald U., Spanswick, Emma L.
• Format: Dataset
• Language: unknown
• Published: University of California, Berkeley 2023
• Subjects: Canada; Dome The; Yellowknife
• Online Access: https://dx.doi.org/10.48322/bvgj-1440; https://hpde.io/NASA/NumericalData/THEMIS/Ground/Yellowknife/ASI/thumb_PT3S.html

THEMIS Ground All Sky Imager at Yellowknife: 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. ...