Accession Number:

AD0705537

Title:

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

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Personal Author(s):

Report Date:

1970-02-01

Pagination or Media Count:

202.0

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.

Subject Categories:

  • Geodesy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE