An analog magnetic-disk recording system, complete with digital-readout to a remote terminal, was used during a recent underground nuclear test at the Nevada Test Site. Dry-run and shot data were digitized and transmitted at 1000 baud by telephone lines to a remote terminal at Los Alamos, New Mexico. The terminal consisted of an on- line computer with a cathode-ray tube to display the data and an incremental magnetic tape to record the data in a form suitable for processing at the LASL Central Computing Facility. The bandwidth of the recording was dc to 3 MHz, and the signal-to-noise ratio was 200 to 1. Sixteen data channels and two clock tracks were used.
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