@misc{Angelopoulos_Mende_Donovan_Frey_Spanswick_2023, title={THEMIS Ground-based All Sky Imager; Full Resolution Images}, url={https://hpde.io/NASA/Collection/THEMIS/Ground/ASI/full_PT3S.html}, DOI={10.48322/5JV5-VC55}, abstractNote={THEMIS Ground All Sky Imager at 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.
    }, publisher={University of California, Berkeley}, author={Angelopoulos, Vassilis and Mende, Stephen B. and Donovan, Eric F. and Frey, Harald U. and Spanswick, Emma Louise}, year={2023} }