1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2634
Full metadata record
DC FieldValueLanguage
dc.contributor.authorNarayan, R.-
dc.contributor.authorCornwell, T.J.-
dc.contributor.authorGoodman, Jeremy-
dc.contributor.authorAnantharamaiah, K.R.-
dc.date.accessioned2007-06-08T09:25:38Z-
dc.date.available2007-06-08T09:25:38Z-
dc.date.issued1990-
dc.identifier.citationURSI/IAU Symposium on Radio Astronomical Seeing, Beijing, People's Republic of China, May 15-19, 1989, Proceedings. Beijing/Oxford, International Academic Publishers/Pergamon Press, 1990, p205-211en
dc.identifier.urihttp://hdl.handle.net/2289/2634-
dc.descriptionRestricted Access. Research supported by Alfred P. Sloan Foundation and David and Lucille Packard Foundation.en
dc.description.abstractThe problem of scattering-induced image distortion ('seeing') in radio astronomy is studied theoretically, emphasizing the strong scattering regimes. The thin-screen approximation is utilized, where a single effective phase-changing screen replaces the extended scattering medium. Length scales are appropriately redefined for an infinitely distant source to characterize incident radiation as plane wavefronts. Imaging regimes, including speckle, seeing disk, snapshot, average, and ensemble-average images are defined and identified for a number of astronomical scattering media. Strong scattering is shown to occur in all cases except in the troposphere, and very strong scattering is identified in the case of scattering by the interstellar medium. Source imaging of very high resolution is allowed by the snapshot regime when a fully redundant array and good signal/noise ratios within extremely short integration times are present. Examining the magnitude and spectrum of refractive-index fluctuations is facilitated by the average regime.en
dc.format.extent444110 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherPergamon Pressen
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?1990ursi.symp..205Nen
dc.rights1990 Pergamon Pressen
dc.subjectIMAGE PROCESSINGen
dc.subjectRADIO ASTRONOMYen
dc.subjectRADIO SCATTERINGen
dc.subjectRADIO TELESCOPESen
dc.subjectSIGNAL TO NOISE RATIOSen
dc.subjectINTERSTELLAR MATTERen
dc.subjectPLANETARY ATMOSPHERESen
dc.subjectSOLAR WINDen
dc.subjectWAVE FRONTSen
dc.titleRadio scattering and imagingen
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
1990 Proc URSI-IAU Symposium p205.pdf
  Restricted Access		Restricted Access433.7 kBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.