JonChesterfield parent
Had two. One showed so much measurement noise they couldn't trust it, other kept cutting out. Not great.
So three ones, two different models, one in a different location. These are like... basics, no?
If you multiply every critical component by 3x there will be no room left for anything else.
2n + 1 is a basic minimum amount of redundancy for anything critical in a high-value space mission.
This isn't a high-value space mission.
The price of a ride to the moon alone would make this "high-value." Cubesats are an example of when you can get away with no redundancy, but this is not a cubesat.
Well the way they did it (twice) means they had space for other stuff, and of course also failed because they didn't have enough redudancy