Archive

President Ends GPS Selective Availability
In a move that will boost the GPS industry and worldwide confidence in the U.S. system at a critical time, President Clinton announced May 1 that he ordered an end...
COMMON GROUND: A Call to Arms
by Clayton Mowry The thrill is gone. Our 15 minutes is over. Satellites are old news. According to the word on the street, the hype and excitement that surrounded the...
Broadband Via Satellite: Pipe Dreams?
By Theresa Foley The debate over bent pipe versus onboard processing is picking up steam as the dozen or so satellite broadband projects come closer to fruition. If William Shakespeare...
Rain: How it Affects the Communications Link
By Robert Nelson Rain affects the transmission of an electromagnetic signal in three ways: (1) It attenuates the signal; (2) it increases the system noise temperature; and (3) it changes...