Fw: Jan/Feb 1999 SARA Journal Articles?
Dr. Rich Russel
James Abshier
Robert,
Perhaps you are referring to the article "Aperture Synthesis With A 400 MHz Interferometer" which appears in the Jan/Feb 1998 SARA Journal. I have written several aperture synthesis articles for the journal over the years. What in particular are you interested in?
Jim Abshier
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Dr. Rich Russel
Robert Meade
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James Abshier
Robert,
The problem is that the Journal date in the index is wrong. The
article that you are interested in was published in the Nov/Dec
1998 journal. But that's not the only problem with the article.
When the article was published in 1998, the editor got the figures
all messed up. Some were misplaced and others were missing. I
don't recall anyone else noticing this (perhaps because no one
else read it). I no longer have the Word Perfect word processor
file of the article draft, but I do have a printout of the draft.
I have scanned this printout into a pdf file and have attached it
to this message.
The article describes an aperture synthesis experiment using a
400 MHz interferometer. Two different approaches were used to show
separation of Cygnus A from Cygnus X. One involved Fourier
transformation of visibility and the other involved just summing
the interferograms. The result from the simple summing approach is
what one might expect to get by combining signals from an array of
antennas.
If you have any questions, I will try to answer them. It has been
many years since I did the experiment. Also, the E-mail address
given under the title is no longer used.
Jim Abshier
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Bruce Randall
Hello Jim and All,
There are a few people including me that read Dec 1998 article. I have refereed a few people to it who have asked me about Phase-Switched interferometers. Article bits fit together better in the correct version you just shared.
Most, including me that have used interferometers have fixed antenna spacing and use them as a means to identify weak sources. They are very effective at that!
Aperture Synthesis is another level of back yard space and math. Maybe a bit of surveying skills as well.
Bruce Randall
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