Instruction manual for Precision Graphic Recorder (PGR)
Instruction manual for Precision Graphic Recorder (PGR)
Date
1960-10
Authors
Knott, Sydney T.
Witzell, Warren E.
Witzell, Warren E.
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Date Created
Location
DOI
10.1575/1912/25168
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Keywords
Sonar
Echo sounding
Oceanographic instruments
Echo sounding
Oceanographic instruments
Abstract
This manual describes the objectives, design, operation, and maintenance of the Precision Graphic Recorder (PGR), emphasizing its application to echo-sounding. The words "precision graphic recording" describe a method for displaying data by means of successive, precisely-timed rectilinear sweeps of a recording point or "stylus" across a long, moving strip of sensitized paper (Veatch and Smith, 1939, p. 61-63). The recorded data appear as dye-markings, shaded in proportion to signal amplitude
along the sweep of the moving recording point.
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Citation
Knott, S. T., & Witzell, W. E. (1960). Instruction manual for Precision Graphic Recorder (PGR). Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/25168