ULTRA PRECISION BASE LINE MEASUREMENT PROGRAM.

Abstract

This report discusses the fundamental methods of precise base line measurement, i.e., measurement of propagation time of electro-magnetic energy, and interferometric comparisons of an unknown distance to an established standard length. The limitations and possible methods of correction of the limitations are discussed. The limitations and possible methods of correction of the limitations are discussed. The general design consideration and a discussion of a modified Vaisala base line are presented. The approach to the design of an optical delay line and its calibration as a field portable etalon are included. The design and use of a three-color laser refractometer to provide the required compensation for refractive index changes is presented. The operation characteristics, the data-taking procedure, and size, shape, weight, and limitation of a van portable system, are discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1967
Accession Number
AD0655099

Entities

People

  • Alan Hurkamp
  • Melvin L. Lowry
  • Soren W. Henriksen

Organizations

  • RTX

Tags

DTIC Thesaurus Topics

  • Base Lines
  • Calibration
  • Compensation
  • Delay Lines
  • Measurement
  • Measuring Instruments
  • Precision
  • Refractive Index
  • Refractometers
  • Standards

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy