Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975itap...23...45p&link_type=abstract
IEEE Transactions on Antennas and Propagation, vol. AP-23, Jan. 1975, p. 45-53. Research supported by the Joint Services Electr
Astronomy and Astrophysics
Astronomy
Algorithms, Data Processing, Fourier Transformation, Maximum Likelihood Estimates, Radio Interferometers, Statistical Analysis, Cross Correlation, Energy Distribution, High Resolution, Radio Sources (Astronomy), Signal To Noise Ratios, Synthetic Arrays
Scientific paper
The output of a radio interferometer is the Fourier transform of the object under investigation. Due to the limited coverage of the Fourier plane, the reconstruction of the image of the source is blurred by the beam of the synthesized array. A maximum-likelihood processing technique is described which uses the statistical properties of the received noise-like signals. This technique has been used extensively in the processing of large-aperture seismic arrays. This inversion method results in a synthesized beam that is more uniform, has lower sidelobes, and higher resolution than the normal Fourier transform methods. The maximum-likelihood method algorithm was applied successfully to very long baseline and short baseline interferometric data.
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