ASTRO is a satellite repairing robot which is launched by DARPA (Defense Advanced Research Project). ASTRO is formed by a pair of satellite and it is designed such that they can patch up other satellite without the guidance of human being. ASTRO relies on its integrated GPS and laser sensor to do its repairing task. Once ASTRO is docked with the targeted ailing satellite, ASTRO will use a 10-foot robotic arm to fill the satellite with fuel and make repairs. Besides that, another mission of ASTRO other than repairing the satellite is providing an orbital boost to the satellite as to allow the recon satellites to maintain position longer.
The introduction of this robotic satellite repairing system eases the job of satellite repairing. However, this robotic system is still under testing. If this system is proved to be stable, there is not needed for astronauts to risk their life in repairing satellite or even spacecraft anymore. ASTRO don't need any interaction with human unless there's a problem with the sensors, passive detection systems, and computer software requiring mission control to intervene.
In my opinion, by improving this satellite repairing robot and minimize its size, astronauts can even carrying them on the spacecraft and use this repairing robot when necessary.
Yong See Wei U048661X