go_artemis

It's actually sold on their Crowd Supply for $99 per 4-antenna RF tile, just as the said on their website.

See the 6-pack: https://www.crowdsupply.com/scale-rf/quadrf#products

specifically designed to collect or analyze information from the electromagnetic spectrum

Wouldn't that apply to every spectrum analyzer?

Rotmans are elegant, but these days you can get full-duplex all digital phased arrays for cheap: https://www.crowdsupply.com/scale-rf/quadrf#

I found this Artemis II tracker to be much better than the NASA one, but it seems to be getting the hug of death, https://artemis.jakobrosin.com/

found it at the very bottom of the updates page

People often see the Jungian personality traits of "judging" vs. "perceiving" etc as actual exogenous traits, but it's also a tendency to spend more time before coming to a conclusion.