ON THE INVESTIGATION OF INSTRUMENTAL ERRORS OF UNIVERSAL AND TRANSIT INSTRUMENTS BY MEANS OF AUTOCOLLIMATION

Abstract

Geodetic astronomy depends to a certain degree on the precision of available instruments. This investigation covers the instrument errors that effect the determination of a horizontal direction and the effect of these errors on position accuracy determination by horizontal angle measurements and vertical transits. The following errors were investigated: (1) axis errors; that is, horizontal, tilt and target axis (2) instrument errors; that is, divided circle, micrometer, and level bubble and heat deflection of the telescope. These errors seldom exceed + 1 minute. Three common first order instruments, the Wild T-4, Kern DKM-3, and the Askania AP70 were investigated. The direct investigation of the instrumental errors was conducted utilizing very precise auto-collimation methods, and statitical methods for defining the type and magnitude of the errors.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
AD0705537

Entities

People

  • Reiner Schwebel

Organizations

  • Air Force Cambridge Research Laboratories

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Analysis Of Variance
  • Astronomy
  • Climate Change
  • Coordinate Systems
  • Equations
  • Errors
  • Fourier Analysis
  • Fourier Series
  • Geodetic Astronomy
  • Measurement
  • Micrometers
  • Observation
  • Optics
  • Precision
  • Statistics

Readers

  • Geodesy

Technology Areas

  • Space