THEMIS Ground-based All Sky Imager Keogram, Level-1
收藏DataCite Commons2025-12-30 更新2025-04-16 收录
下载链接：
https://spase-metadata.org/NASA/NumericalData/THEMIS/Ground/ASK/PT3S
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资源简介：
THEMIS Ground All Sky Imager Keograms for all observatories. Keograms are composed of thin images slices taken down the middle of all-sky images and graphed against time. Keograms allow for substorm analysis without the need for full sized raw images. The ASI stations each 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. 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.
提供机构：
Space Physics Data Facility; University of California, Berkeley
创建时间：
2023-07-30
