The signal from a satellite is normally aimed at a specific area called the _________.

There is (are) _____ orbit(s) for a GEO satellite.

MEO satellites are located at altitudes between km.

LEO satellites are normally below an altitude of ________ km.

______ is based on a principle called trilateration.

________ is a second-generation cellular phone system based on CDMA and DSSS.

___________ is a second-generation cellular phone system used in Europe.

____________ is a digital version of AMPS.

__________ is a second-generation cellular phone system.

_______ is a first-generation cellular phone system.