I heard a few days ago that satellite radio can not work as well when driving in between tall buildings. Makes sense, it does depend on satellites. My question is, how does it work if it depends on a satellite? TV satellites have to be left in a stationary position to get a clear signal, but obviously, in a car, you are always moving. Does it somehow send out a 360 degree signal for the satellite to retrieve? Another question, if it doesn't work in between tall buildings, is it worth it, since it won't necessarily work in all aspects of daily life? Thanks!