Question

In which scenario is satellite used?Defend your answer by giving any three reasons

Answer 1

Satellites are manmade objects put into orbit. They often affect our lives without our realizing it: they make us safer, provide modern conveniences, and broadcast entertainment. Here are some of the jobs satellites do:

Television

Satellites send television signals directly to homes, but they also are the backbone of cable and network TV. These satellites send signals from a central station that generates programming to smaller stations that send the signals locally via cables or the airwaves. "At the scene" news broadcasts, whether live reporting on a vote at the Capitol or from the scene of a traffic accident, are sent from the field to the studio via satellite, too.

Telephones

Satellites provide in-flight phone communications on airplanes, and are often the main conduit of voice communication for rural areas and areas where phone lines are damaged after a disaster. Satellites also provide the primary timing source for cell phones and pagers. In 1998, a satellite failure demonstrated this dependence; it temporarily silenced 80 percent of the pagers in the United States, National Public Radio was not able to distribute its broadcasts to affiliates and broadcasted only via its website, and on the CBS Evening News, the image of Dan Rather froze while the audio continued.

Navigation

Satellite-based navigation systems like the Navstar Global Positioning Systems (known colloquially as GPS) enable anyone with a handheld receiver to determine her location to within a few meters. GPS locators are increasingly included in in-car direction services and allow car-share services like Zipcar to locate their cars. GPS-based systems are used by civilians and the military for navigation on land, sea, and air, and are crucial in situations like a ship making a difficult course in a harbor in bad weather or troops lost in unfamiliar territory, where other navigation tools may not exist.