Panchromatic all-sky TV data

This is a Sino-Japan collaborative observation at Zhongshan Station,
Antarctica, which commenced in March 1995 (Principal Investigators: Prof.
Natsuo Sato, National Institute of Polar Research and Dr. Huigne Yang, Polar
Research Institute of China). The observation system comprises a HARPICON
(High-gain Avalanche Rushing Amorphous Photoconductor) TV camera fitted with a
fish-eye lens. A HARPICON tube utilizes an amorphous photoconductive selenium
target within which an avalanche signal multiplication may be obtained under a
high voltage. The exposure time of the observation is set to 2 seconds and a
sensitivity of ~6 times higher than that of a conventional SIT tube is
achieved. The all-sky TV data are originally recorded on video tapes in NTSC
format, which are digitized into AVI files of 320*240 pixels.