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Submilliarcsecond VLBI Using Compact Close Pairs of Radio Sources: Error AnalysisThe potential accuracy attainable for (delta) VLBI positional measurements (submilliarc second level) is reached by simultaneously observing pairs of compact radio sources whose angular separation are smaller than the beamwidth of each antenna. Simultaneous (delta) VLBI (SVLBI) enables significant cancellation of measurement errors. Solar plasma is the dominant fluctuating error source in SVLBI positional measurements since there is enhanced cancellation of the troposphere and ionosphere, and complete cancellation of oscillator instabilities. Of the nonfluctuating error sources, errors due to universal time predominate. By performing SVLBI experiments over several years with many different close pairs of radio sources, limits can be placed on reference frame stability. Intrinsic properties of the sources, such as source structure and proper motion, will limit measurements. The SVLBI differential phase and corruptive noise sources will be discussed here along with estimated results.
Document ID
19850005672
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Morabito, D. D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
November 15, 1984
Publication Information
Publication: The Telecommunications and Data Acquisition Rept.
Subject Category
Communications And Radar
Accession Number
85N13981
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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