BrahMos WORLD INDIA MADHYA PRADESH BHOPAL WTN SPECIAL Astrology GOSSIP CORNER SPORTS BUSINESS FUN FACTS ENTERTAINMENT LIFESTYLE TRAVEL ART & LITERATURE SCIENCE & TECHNOLOGY HEALTH EDUCATION DIASPORA OPINION & INTERVIEW RECIPES DRINKS FUNNY VIDEOS VIRAL ON WEB PICTURE STORIES
WTN HINDI ABOUT US PRIVACY POLICY SITEMAP CONTACT US
logo
Breaking News

HOW DOES GPS WORK?

Monday - December 24, 2018 4:30 pm , Category : Fun Facts

WTN- GPS –Global Positioning System –is a space –age version of triangulation. Originally  developed for military use. GPS has three components, satellites orbiting Earth master control station around the world ,and receivers installed in location ranging from naval destroyers to private golf  carts.

In the U.S GPS system ,two dozen Navstar satellites orbits the planet every 12 hours, following six different orbits. Three additional satellites orbit as backup , the satellites  contain atomic clock that send precise time with each signal . the control stations monitor the satellites ,using remote controlled on-board thrusters to manage their position.

When a GPS user on land or sea calls for location information, signals pass, from orbiting satellites to that user’s receiver. The length of time taken by the transmission-usually a fraction of a second –help determine distance to a point on an imaginary sphere, and the user’s latitude and longitude can be calculated by using the mathematics of triangulation. Three satellites would suffice. But more provide redundancy and compensate for inaccuracies.
 
GPS signals are broadcast on two different frequencies, one for military use and one for civilian use. Civilian augmentation can provide precise location to within 0.4 of an inch.