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.