Wow. That's surprisingly un-NASA. I wonder if they have qualified the MTBF? For this kind of solution to work, it'd have to be at least a couple hours.
Actually, a lot of smaller things that go up just go into reboot cycles when they detect that kind of error.
Because at the end of the day, "Radiation hardening" just means, "Less likely to experience one of these errors but oh hey a solar flare is inc..." Satellites just sort of float until their orbit decays, they are de-orbited, or they are lost.
You wouldn't do this for a spy satellite you need to send you images of the sky in realtime for end-of-the-world missile guidance, but for something that's doing science missions it's probably way more important to make something light and cheap that a russian mission can drop out the back of its launch.
Maybe in this case it's cheaper to just send them up and measure it directly? It won't survive much TID, either, but with such a short mission and such cheap hardware, hopefully none of that matters.
