This is a really cool, valuable, important project. It's a little bit of a bummer that they went down the USRP Route (https://powderwireless.net/equipment), as USRPs are really not accessible to many people (price point). Something like a Lime Microsystems radio, or the BladeRF 2.0 Micro (https://www.nuand.com/bladerf-2-0-micro/), would have been really nice.
The Skylark Wireless radios are based on the Lime Microsystems chip. The lead developer at Skylark is the guy who originally wrote Gnu Radio Companion and went on to write SoapySDR and Pothosflow, as well as the first (useful) driver for the LMS chips. Super smart guy at the core of a super smart team. They’re big on open source and I know firsthand that the University of Utah is using their radios. I believe that page is just old, there’s a picture on that page that shows a box that I recognize as very early Skylark equipment.
There is a reason everyone uses Ettus Radios (USRP). You will quickly pay back the extra cost though saved engineering time over by not buying cheap hobbyist hardware.
