The cyclesonde: an unattended vertical profiler for scalar and vector quantities in the upper ocean

John Van Leer, Walter Düing, Robert Erath, Edward Kennelly, Arthur Speidel

Research output: Contribution to journalArticle

27 Scopus citations


An instrument, the Cyclesonde, is described which consists of a buoyancy driven platform with a recording package containing sensors for pressure, temperature, current speed, and current direction. The Cyclesonde makes repeated automatic round trips up and down a taut-wire, subsurface mooring while scanning these four parameters with a 26-s sampling interval. According to the adjustable vertical speed ranging between 2 and 20 cm s-1, a vertical resolution ranging between 0·5 and 5 m can be achieved. The usage of the Cyclesonde is presently limited to the upper 200 m in the ocean and a maximum of 300 cycles (600 profiles) during a 5·5-day period. Selected sequences of typical profiles of various parameters are presented.

Original languageEnglish (US)
Pages (from-to)385-386,IN1-IN2,387-400
JournalDeep-Sea Research and Oceanographic Abstracts
Issue number5
StatePublished - May 1974


ASJC Scopus subject areas

  • Engineering(all)

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