Didn't you know? Find a place outside the city on a night with clear skies. You can see the satellites crossing the sky. Get some binoculars if you need them.
I really hate to threadjack, but I gotta. This sounds like a dig at the tinfoil hit crowd... but as I recollect it's actually true. It's been years now but I used to use a piece of software called Xephem (
http://www.clearskyinstitute.com/xephem/) on a Linux box as I sat outside star gazing. Really cool. You pick your location in the world and it maps out all the stars, planets, and yes, satelites. There's hundreds of things you can do with it.
As I recollect it's fairly easy to spot a satelite if one is in the area, but the only ones you'll see are non-communications related satelites, which includes "spy" or photograph taking satelites. All communications satelites (TV, radio, etc) are located above the equator and put into orbit that will keep them above the exact same spot on the ground all the time. They're place just far enough away and given a "push" to match the earth's rotation so that as gravity pulls them down they move forward an appropriate distance which keeps them in synch with the earth. It's called a geosynchronous orbit. To achieve this they actually move, if my math is correct, around 3400mp/h.
"Spy" (and GPS) statelites must move just as fast to keep themselves in orbit, but they're useless unless they travel on a path less than true with the equator. If they didn't they'd only be able to take pictures of the same spot over and over again. Their distance to the earth's surface is about 22,000 miles and they're chugging along at 3400mp/h so they tend to stand out against stars or other planets in our solar system. This makes them fairly easy to pick out. They're the ones moving -- and moving fast when compared to everything else in the sky.
Anyway, back to the topic at hand:
I've had, at most, one dealing with an actual ATF agent. He was either that or just plain crazy, but I can usually spot crazy, and this guy wasn't. Name given was Mike Murphy and it was out at Richard Celata's place (KT Ordnance) a month or so after his raid by the ATF. Fellow was out their for Rick's open house and trying to get anybody there to sell him a weapon, but kept asking for illegal things. The first day he wanted a .22Mag with a silencer, the next he was just looking for a .357 magnum. In great detail he explained that nobody would sell him a gun because he wasn't an MT resident, but wanted one anyway. At one point he ventured into the land of the white supremacists and while "he didn't agree with the KKK, at least they report the truth" he explained that black folks in the cities were kidnapping white women and children and forcing them into prostitution.
So, I guess my only personal beef with what was possibly an ATF agent was: 1) Trying to talk me into doing something illegal and 2) Harshing my mellow as my buddy and I got our first chance shooting at 600 yards in our lives.