DETECTION OF SIMULATED SONAR LINE TARGETS IN FREQUENCY-TIME-INTENSITY DISPLAYS WITH REDUCED DISPLAY AREA

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Authors
  1. McFadden, S.M.
  2. Taylor, M.M.
  3. Fast, C.D.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Single target lines were detected against a background of white noise in a simulated sonar frequency-time-intensity display. The study evaluated the effect of reducing the total area of the display. Display size was reduced either by ORing together adjacent frequency bins or by reducing the number of independent time samples displayed. ORing ratios of 1:1, 2:1, and 4:1 and histories of 20 through 400 time samples were used. Detection performance was a function of total display area for history durations longer than 20 time samples. Reducing the number of pixels displayed by reducing the amount of history displayed or by ORing had an equivalent effect. Each halving of display area caused a 1.5 dB reduction in detectability of the target line.
Report Number
DCIEM-83-R-56 —
Date of publication
15 Nov 1983
Number of Pages
19
DSTKIM No
84-02115
CANDIS No
121505
Format(s):
Originator's fiche received by DSIS;Hardcopy

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