Satellites don't "see" aircraft whose communications systems aren't functioning.
Here's a list, of the 3,909 active satellites, orbiting the planet. I should think someone knows, or is close to finding out. Unfortunately, this one *does* take a rocket scientist (had to happen, eventually) -- http://www.n2yo.com/satellites/?c=&t=country http://www.n2yo.com/satellites/?c=&t=country ---In FairfieldLife@yahoogroups.com, <steve.sundur@...> wrote : So where's the fuckin' plane! Speaking of practical benefits. (-: