> Isn't there a requirement for all cube-sats to pass radiation tests / shock tests or whatever for them to be accepted for launch? The launch provider usually

> Isn't there a requirement for all cube-sats to pass radiation tests / shock tests or whatever for them to be accepted for launch? The launch provider usually doesn't care about radiation tests. For CubeSats they mostly only want to see vibration test reports. Now, you and your user(s) will want to make sure that the satellite will work for a certain time while in orbit. So you throw all the functional and environmental tests that you can reasonably perform at it. And indeed, that's where you spend a lot of money.