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It's just as simple as taking the flux at some wavelength (just a number) and using this number to represent a visible intensity. If you only have one wavelength then you can only get a monochrome picture. However, if you have flux information at more than one wavelength, let's say three, you can use the flux at the longest wavelength to represent red (r), ...


3

Rather than looking for ready-made systems, take a look at projects. Right now, plenty of amateurs are using software defined radio coupled to various antennas for astronomy. Start here: http://www.rtl-sdr.com/rtl-sdr-for-budget-radio-astronomy/ And while it has nothing to do with imaging, there's plenty of radio astronomy that amateurs can do using simple ...



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