Accession Number : ADA150923


Title :   Precision and Accuracy of Intercontinental Distance Determinations Using Radio Interferometry.


Descriptive Note : Doctoral thesis,


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE


Personal Author(s) : Herring,T A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a150923.pdf


Report Date : Jul 1983


Pagination or Media Count : 443


Abstract : Very-long-baseline interferometry (VLBI) is a technique which potentially can measure intercontinental distances with 1 cm precision. Already, measurements have been made which have nearly reached this goal, if we accept the standard deviations calculated from statistical arguments. However, the sources of errors in these measurements must be carefully analyzed and accounted for to ensure reliability in the interpretation of results obtained from VLBI data analysis. In this thesis, we concentrate on examining both the theory and the quality of the VLBI delay measurements. Using the redundant nature of the VLBI observations, we develop a number of quality tests. These tests are applied to data taken in VLBI experiments between July 1980 and January 1982. All of these tests lead to similar qualitative conclusions about the performance of the Mark III VLBI system. There are, however, differences from each of these tests in the quantitative conclusions about the system performance. These tests indicate that the actual statistics of the VLBI group delay observations do not match the theoretically calculated statistics. Keywords include: Interferometry; Radio astronomy; Quasar.


Descriptors :   *RADIO INTERFEROMETRY , MEASUREMENT , ACCURACY , THESES , LENGTH , PRECISION , GEODESY , RADIO ASTRONOMY


Subject Categories : Astrophysics
      Geodesy


Distribution Statement : APPROVED FOR PUBLIC RELEASE