Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/1611
Title: | Optimum weighting function in bispectral analysis in speckle interferometry - Binary star parity detection |
Authors: | Karbelkar, S.N. |
Keywords: | BINARY STARS SPECKLE INTERFEROMETRY SPECTRUM ANALYSIS WEIGHTING FUNCTIONS ATMOSPHERIC TURBULENCE IMAGE PROCESSING SEEING (ASTRONOMY) SIGNAL TO NOISE RATIOS |
Issue Date: | Nov-1990 |
Publisher: | Springer-Verlag |
Citation: | Astronomy and Astrophysics, 1990, Vol.238, p485-493 |
Abstract: | In order to describe the atmospheric turbulence which limits the resolution of long-exposure images obtained using ground-based large telescopes, a simplified model of a speckle pattern, reducing the complexity of calculating field-correlations of very high order, is presented. Focal plane correlations are used instead of correlations in the spatial frequency domain. General tripple correlations for a point source and for a binary are calculated and it is shown that they are not a strong function of the binary separation. For binary separations close to the diffraction limit of the telescope, the genuine triple correlation technique ensures a better SNR than the near-axis Knox-Thompson technique. The simplifications allow a complete analysis of the noise properties at all levels of light. |
URI: | http://hdl.handle.net/2289/1611 |
ISSN: | 0004-6361 |
Alternative Location: | http://adsabs.harvard.edu/cgi-bin/bib_query?1990A&A...238..485K |
Copyright: | (1990) by the European Southern Observatory. Scanned images provided by the NASA ADS. |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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1990 A&A V238 p485-493.pdf | 9p. | 1.52 MB | Adobe PDF | View/Open |
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