The sudden failure of the Japanese Advanced Land Observing Satellite (ALOS) just goes to show you what happens in space tends to stay in space.
The ALOS appears to have suffered from a quick-acting and catastrophic loss of power. Yes, it exceeded JAXA’s five-year life goal, but not by much. And many satellites, like the Energizer Bunny, just go on and on.
So what happened to ALOS? Was its massive solar panel struck by an unobservable piece of debris? Did it suddenly succumb to an earlier space weather event which finally took its toll? Was it hit with a space warfare high power microwave that the North Koreans are testing for China?
Just sayin’. You know, enquiring minds want to know and all that.
Space situational awareness is intended to not just know what’s in space, but what’s going on in space. That includes information beyond position and orbital parameters to include attribution (and non-attribution).