A PHOTOGRAMMETRIC METHOD FOR DETERMINING THE TOPOGRAPHY OF LIQUID SURFACES

Abstract

A stereophotogrammetric method was developed for the determination of the topography of liquid surfaces, which serve as an analogue for gas pressures and velocities in the evaluation of turbine performance. An instrumentation system has been constructed, consisting of two modified Wild RC-7 cameras with microflash projection of a random pattern of spots to identify the water table surface. The reduction of the data was accomplished by both analogue and analytical methods. The analogue method, including automatic plotting, was the more economical and yielded an accuracy of =120 microns. The analytical method, involving manual plotting, resulted in an overall accuracy of =60 microns, and an accuracy of =30 microns for small areas near the center.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0404188

Entities

People

  • Donald F. Menne
  • Heinz G. Poetzschke

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Air Force Facilities
  • Cameras
  • Civil Engineering
  • Corporations
  • Data Reduction
  • Engineering
  • Geography
  • Groundwater
  • Instrumentation
  • Measurement
  • New Mexico
  • New York
  • Photographic Materials
  • Photographs
  • Photography

Readers

  • Aerosol Science/Aerosol Physics
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Geodesy