Still doesn't make sense. Earth has low radiation to support life...
Even building a supporting passive cooling, water recycling + solar farm in a desert would cost less than unnumbered trips to the Moon and back. Switch is doing "fine" in the Nevada desert...
You need some maintenance crew to keep alive, you need to feed them (tho with their robotics maybe not).
Plus you would need to have the data transferred back to Earth - without letting the enemy reading / decoding it over time.