Sound velocity profilers and the algorithm for determining the density of water for the oceanographic range

A. N. Grekov, N.A. Grekov, E.N. Sychov

Institute of Natural and Technical Systems, Russian Federation, Sevastopol, Lenin St., 28


DOI: 10.33075/2220-5861-2017-2-11-15

UDC 551.46.08


   This article gives an analysis of sound speed profilers created by world manufacturers of oceanographic instruments. Particular attention is paid to the measuring channel of sound speed, technical and metrolog¬ical characteristics. An algorithm is proposed for using such devices to determine the density of sea water. For this the authors developed an equation that makes it possible to calculate the density of the aqueous medium from the measurements of temperature, pressure, and sound velocity. The equation reproduces the density of sea water in the oceanographic region of the measured parameters with high accuracy (RMS = 0,004 kg / m3). The graphs of comparison of the calculated density of sea water with the data of TEOS-IO are given.

Keywords: sea water, sound velocity, SVP, seawater density, equation of state.

Full text in PDF (RUS)


  1. Grekov A. N., Grekov N. A., Sychev E. N. Sound velocity Profiler and algorithm for determining water density for the Oceanographic range / / Monitoring systems of environment. Sevastopol: INTS. 2017. Issue 8 (28). P. 11-15.
  2. Expendable Bathythermograph Expendable Sound Velocimeter (XBT/XSV): [Электронный ресурс]. URL: m/lockheed/data/ms2/documents/ocean/200 50054_XBT_XSV_reader_page.pdf. (дата обращения: 01.07.2017).
  3. IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of seawater – 2010: Calculation and use of thermodynamic properties. Intergovernmental Oceanographic Commission, Manuals and Guides No. 56, UNESCO (English), 196 pp.: [Электронный ресурс]. URL: 10_Manual.pdf. (дата обращения:

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