11.   For one thing, the satellite signals sometimes get fuzzy after they ricochet off birds and dust specks in the atmosphere.

12.   GPS units do not work well at the disaster site, however, because the surrounding tall buildings interfere with the satellite signals.

13.   Heavy rain, snow or cloud cover can block your satellite signal, which can interrupt your programming service.

14.   However, satellite broadcast signals are potentially troublesome things, susceptible to variations in weather.

15.   However, because of its precision, the U.S. government degrades the satellite signals being transmitted to civilian GPS receivers for national security reasons.

16.   In all, keeping satellite television signals out of the homes of those who make an effort to receive them may be a nearly impossible task.

17.   Like the Garmin, the MNS has an altimeter that relies on atmospheric pressure, not satellite signals, for its readings.

18.   Last year, U.S. regulators refused to grant a license to grab satellite signals to Telesat Canada.

19.   Last year, U.S. regulators refused to grant Telesat Canada a license to grab satellite signals.

20.   Lovas said the windshield of a jumbo jet could potentially interfere with the satellite signal but that the antenna could simply be moved to a different window.