2.1.0 spase://VMO/NumericalData/THEMIS/Ground/CANMAG/ATHA/ASI/full_PT3S THEMIS Ground-based All Sky Imager; Full Resolution Images. THEMIS-Ground ASF 2010-03-29T19:26:35Z THEMIS Ground All Sky Imager at Athabasca: 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. We acknowledge NASA contract NAS5-02099 and V. Angelopoulos for use of data from the THEMIS Mission. Specifically: Martin Connors for building the Athabasca Station, 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. spase://SMWG/Person/Vassilis.Angelopoulos PrincipalInvestigator spase://SMWG/Person/Stephen.B.Mende CoInvestigator spase://SMWG/Person/Eric.Donovan 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://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open THEMIS Web Data http://themis.ssl.berkeley.edu/data/themis/thg/l1/asi/atha/ CDF None spase://SMWG/Instrument/THEMIS/Ground/CANMAG/ATHA/ASI ImageIntensity 2005-10-01T04:00:00 -P1Y PT3S ASF data is retrieved by physically swapping hard drives at GBO site, therefore the data is usually not available for at least 3-5 months. thg_asf_atha thg_asf_atha Full images of 256x256 pixels; saturation counts for each pixel. counts 256 256 Scalar Photon Intensity thg_asf_atha_column thg_asf_atha_column Image column number; x-dimension, image width. 256 Other thg_asf_atha_row thg_asf_atha_row Image row number; y-dimension, image height. 256 Other thg_asf_atha_time thg_asf_atha_time Start of integration time, UTC, in seconds since 01-Jan-1970 00:00:00 Not including leap seconds s 0.0 5.0E9 NaN Temporal thg_asf_atha_tend thg_asf_atha_tend Integration end time, UTC, in seconds since 01-Jan-1970 00:00:00 Not including leap seconds s 0.0 5.0E9 NaN Temporal