A Microprocessor Controlled Instrument For Measuring The Transmittance And Reflectance Of Ocean Waters

R. W. Austin; R. L. Ensminger

doi:10.1117/12.956852

10 November 1978 A Microprocessor Controlled Instrument For Measuring The Transmittance And Reflectance Of Ocean Waters

R. W. Austin, R. L. Ensminger

Proceedings Volume 0160, Ocean Optics V; (1978) https://doi.org/10.1117/12.956852
Event: 22nd Annual Technical Symposium, 1978, San Diego, United States

Abstract

The factors contributing to the visibility of submerged targets are discussed and the data requirements for calculating submerged contrast and contrast transmittance are developed. An instrument capable of making the measurements of the optical properties of seawater needed for visibility calculations is described. The instrument incorporates proven features of previous spectral transmissometers and oceanographic illuminometers into a single unit that can be operated through standard STD cables up to 8000 meters in length. It can, as a result, be used on most oceanographic vessels without requiring the addition of a special winch and cable. The instrument system utilizes a unique microprocessor-controlled, digital data acquisition and command system. This system performs the control and data transmission functions for eight underwater data channels through the armored, single wire STD cable. The total instrument system includes an HP9830B desk-top computer for data processing and recording, with an interconnected plotter for the real-time plotting of the measured variables.

Citation Download Citation

R. W. Austin and R. L. Ensminger "A Microprocessor Controlled Instrument For Measuring The Transmittance And Reflectance Of Ocean Waters", Proc. SPIE 0160, Ocean Optics V, (10 November 1978); https://doi.org/10.1117/12.956852

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