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    Electronic Resource
    Electronic Resource
    Springer
    Marine geophysical researches 3 (1977), S. 179-196 
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Ocean bottom seismographs designed to meet the requirements of both seismicity and refraction experiments have been operated extensively on twelve cruises (72 deployments). Signals from a hydrophone, and two geophones (horizontal and vertical) are direct recorded on a modified commercial tape recorder providing 10 day continuous recording at 1/40 ips and a 2–80 Hz band width. The free-fall deployment technique with timed ballast release has yielded a 93% recovery rate (96% over the most recent 24 deployments) despite frequently difficult weather and sea conditions. Emphasis on reliability and operational simplicity has produced an instrument that can be operated in arrays by a single shipboard technician.
    Type of Medium: Electronic Resource
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