Accession Number : AD0655099

Title :   ULTRA PRECISION BASE LINE MEASUREMENT PROGRAM.

Descriptive Note : Final rept. 1 Feb 66-2 Mar 67,

Corporate Author : RAYTHEON CO ALEXANDRIA VA AUTOMETRIC OPERATION

Personal Author(s) : Lowry,Melvin L. ; Henriksen,Soren W. ; Hurkamp,Alan

Report Date : 01 FEB 1967

Pagination or Media Count : 97

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)

Descriptors :   (*GEODESICS, MEASUREMENT), RANGE(DISTANCE), INTERFEROMETERS, DELAY LINES, REFRACTOMETERS, LASERS

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE