I believe that this question has been answered before in two posts which addressed questions about single radio telescopes…
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The Difference Between Brightness and Flux Density
You are correct in that brightness (you used the term “intensity”) is independent of distance, but flux density is…

What are the Angles Separating the Tracks of the VLA Antenna Layout and What is its Orientation Relative to Geographic North?
The angles which separate the arms of the “Y” configuration of the VLA antennas are 120 degrees. Additionally, according…

What Do Radio Telescopes Do About Snow and Ice Accumulation?
Measurements that radio telescopes that operate at relatively long wavelengths, about one centimeter or longer, are not affected by…

How Many Pixels in an Image can be Collected Simultaneously and How Long Does it Take to Make a Measurement?
There is no solid upper-limit to the number of pixels that can be collected in a single image gathered…

How to Make Images with a Radio Telescope
I believe that this question has been answered before in our post answering the question How Does a Single…