I have a small antenna and radio system that can receive frequencies between 1MHz and 1GHz. The system has a discone antenna. I plan to do some aperture synthesis based on the daily rotation of the Earth that will allow me to resolve a lune with a width of about one degree.

What objects and specific frequencies should I observe to test to see if the system and algorithm is functioning properly?

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    $\begingroup$ Interesting question! By aperture synthesis I think you mean a single antenna's received signal is recorded at several different times as it moves to different locations, and those are combined computationally off-line in a way similar to having multiple antennas at those locations. This works well for radar where phase and coherence of the source is controlled. Can aperture synthesis be used for single antenna receive-only radio astronomy systems? Are there any known examples of this being done with a single antenna? $\endgroup$ – uhoh Mar 11 at 23:48
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    $\begingroup$ I can do the aperture synthesis only because the antenna is a on the rotating Earth. Like you said, as the Earth rotates, it's as if I have lots of antennas. One limitation is that objects that move faster or slower than the "fixed stars" will look like noise to the synthesis algorithm. I might be able to use different processing techniques to see the faster/slower objects. I don't know of any examples of this being done like this, but I am not really in a position to know that sort of thing. Part of the reason for posting was to see if anyone recognized what I was doing. $\endgroup$ – Craeft Mar 11 at 23:59
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    $\begingroup$ Yes, and also within my receiver bandwidth, and likely to avoid Earth based transmitters. $\endgroup$ – Craeft Mar 12 at 0:15
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    $\begingroup$ In 1960s Cassiopeia A, Crab Nebula used to calibrate radiotelescopes. $\endgroup$ – A. Rumlin Mar 12 at 18:24
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    $\begingroup$ Now that your question has been here for two days I can add a bounty to it. I think it's a great question and am interested in its answer. $\endgroup$ – uhoh Mar 15 at 1:36

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