Not great, but it worked serviceably. Most of the chips going into LEO aren't rad hard. There's various techniques for dealing with problems like single event u

Not great, but it worked serviceably. Most of the chips going into LEO aren't rad hard. There's various techniques for dealing with problems like single event upsets and latchup. For the cubesat formfactor I think watchdogs timers are the most common and require the least overhead. I think this[1] is the datasheet for the chip that we used (on a custom PCB), I'm not an RF person but maybe that will answer your questions about dbs. Communication systems are certainly critical, and it's smart to have redundancy like that team did. However it's kinda like backing up your harddrive— redundancy is pointless if you never test it and it ends up not working. Lots of satellites have radio problems. Lots of satellites also don't have radio problems— there's always going to be a small number of random failures, but most of the problems are not insurmountable, especially if you're able to test extensively and iterate [1]: http://www.ti.com/lit/ds/symlink/cc1101.pdf http://www.ti.com/lit/ds/symlink/cc1101.pdf