Survey of the McDonald Observatory Radial Line Scheme by Relative Lateration Techniques.

摘要

During May and June 1977,the National Ocean Survey/National Geodetic Survey (NOS/NGS) performed a special survey in the vicinity of the University of Texas McDonald Observatory. This was the initial phase of an extensive geodetic-geophysical study to detect any secular or episodic motions of the observatory relative to prominent topographic features within a region extending as far as 100km from the observatory. An important part of the study plan is the monitoring,by periodic resurveys,of any changes in the lengths of a radial pattern of lines that are as long as 93km. A method of relative lateration,the 'ratio method',using electromagnetic distance measurements is being tested. This paper contains descriptive information about the methods employed in the collection,reduction,and analysis of the survey data,tabulations of the observational data,and the numerical and interpretive results of our analyses.