David Shiga in New Scientist:
Relatively simple technology suffices to take out a satellite the way the Chinese government apparently did last week, space weapons analysts say. Essentially any country that can put a satellite in orbit could launch a weapon to destroy one.
The US government says China launched a ballistic missile on 11 January that destroyed one of its own spacecraft, a defunct weather satellite called Fengyun-1C, in an apparent test of anti-satellite technology (see China dismisses ‘space arms race’ fears).
This makes China one of just three nations in history to have successfully tested an anti-satellite weapon, along with the US and the former Soviet Union. But the technology required is not very sophisticated, potentially putting it in reach of other countries as well.