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Any existing software that creates spectrum heat maps?

W1WRA
Member ✭✭
Greetings,
I can probably hack something together, but if something exists I'd rather use that.
Are there are 3rd party apps that can create heat maps of observed spectrum?
For those that may be familiar with good ole RTL SDR dongles, I am thinking of something like using rtl_power and then creating a heat map using different tools.
Do I need to break out a text editor, or does something already exist that I can leverage?
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