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Interval estimates for closure-phase and closure-amplitude imaging in radio astronomyInterval estimates for closure-phase and closure-amplitude imaging that enable the reconstruction of a radioimage from results of approximate measurements are presented. If the intervals for the measured values are known, the precision of the result of the reconstruction cannot be solved by standard interval methods, because the phase value is based on a circle but not on a real line. If the phase theta (x bar) is measured with precision epsilon, so that the closure phase theta (x bar) + theta (y bar) - theta (x bar + y bar) is known with precision 3 epsilon, then from these measurements theta can be reconstructed with precision 6 epsilon. Similar estimates are given for closure amplitude.
Document ID
19930068752
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kreinovich, Vladik
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Bernat, Andrew
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Kosheleva, Olga
(Texas Univ. El Paso, United States)
Finkel'shtejn, Andrej
(Russian Academy of Sciences Inst. for Applied Astronomy, St. Petersburg, Russia)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Interval Computations
Issue: Apr-71
ISSN: 0135-4868
Subject Category
Astronomy
Accession Number
93A52749
Funding Number(s)
CONTRACT_GRANT: NAG9-482
CONTRACT_GRANT: NSF CDA-90-15006
Distribution Limits
Public
Copyright
Other

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