SECTOR SCAN INDICATOR QXA

Abstract

The Sector Scan Indicator (SSI) is a device for presenting, on the screen of a cathode-ray tube, a picture of the reflecting objects in the field of a supersonic projector. Such objects are displayed as a series of short, bright, horizontal-line segments, with vertical deflection from the bottom proportional to range, and with horizontal deflection from a vertical center line proportional to angular deviation from the axis of the sound beam. The detail obtained by television is not approached in SSI because of the long transit time of sound, difficulties encountered in focusing, and many other reasons including lack of cooperation on the part of the subject. Nevertheless, a coarsegrained picture which at least resolved small objects separated in range and at best resolved different parts of the same reflecting object separated in range was obtained. This report tells how SSI functions, presents some of the many uses to which it may be put, and includes photographs and data regarding actual tests. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1945
Accession Number
AD0310377

Entities

People

  • H. L. Saxton

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acoustics
  • Amplifiers
  • Cathode Ray Tubes
  • Circuits
  • Control Knobs
  • Doppler Effect
  • Echo Ranging
  • Frequency
  • Government Procurement
  • Governments
  • Local Oscillators
  • Oscillators
  • Propeller Noise
  • Range Finding
  • Resonant Circuits
  • Tuned Circuits

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Geodesy
  • Human-Computer Interaction (HCI).

Technology Areas

  • Directed Energy
  • Hypersonics
  • Hypersonics - Hypersonic Flow