7/31/2019 Bodey

1/2

2. What does GPS stand for? Global Positioning System 3. History Invented by the U.S Department of Defense which they used as a military application It was designed, built

and operated and maintained by the Department of Defense Designed to track submarines carrying nuclear missiles

Costing ~12 Billion tax payer dollars 4. Before GPS Stars Compasses Maps 5. How does it work?A group of satellites around the earths orbit transmit precise signals These signals allow GPS

receivers to calculate and display accurate location, speed and time information to the user It only takes 3 or more

satellites to pinpoint your location

6. How GPS works continuedGPS works through all weather conditions, all day and around the clock Some locationsmay not permit accurate GPS navigation due to blocked signals that can be caused by canyon walls, skyscrapers or

dense forests GPS receivers are typically accurate within 15 meters

GPS APPLICATIONS.

Like the Internet, GPS is an essential element of the global information

infrastructure. The free, open, and dependable nature of GPS has led to thedevelopment of hundreds of applications affecting every aspect of modern life. GPStechnology is now in everything from cell phones and wristwatches to bulldozers,shipping containers, and ATM's.

GPS boosts productivity across a wide swath of the economy, to include farming,construction, mining, surveying, package delivery, and logistical supply chainmanagement. Major communications networks, banking systems, financial markets,and power grids depend heavily on GPS for precise time synchronization. Somewireless services cannot operate without it.

GPS saves lives by preventing transportation accidents, aiding search and rescueefforts, and speeding the delivery of emergency services and disaster relief. GPS isvital to the Next Generation Air Transportation System (NextGen) that will enhanceflight safety while increasing airspace capacity. GPS also advances scientific aims suchas weather forecasting, earthquake monitoring, and environmental protection.

Finally, GPS remains critical to U.S. national security, and its applications areintegrated into virtually every facet of U.S. military operations. Nearly all newmilitary assets -- from vehicles to munitions -- come equipped with GPS.

The GPS comprises of three segments.

CONTROL,USER AND SPACE SEGMENT.

CONTROL SEGMENT.

The control segment consists of worldwide monitor and control stations that

maintain the satellites in their proper orbits through occasional command

7/31/2019 Bodey

2/2

maneuvers, and adjust the satellite clocks. It tracks the GPS satellites, uploads

updated navigational data, and maintains health and status of the satellite

constellation.

USER SEGMENT

The user segment consists of the GPS receiver equipment, which receives the

signals from the GPS satellites and uses the transmitted information to

calculate the users three-dimensional position and time.

GPS stands for Global positioning system which was invented by United States

Department of Defense. It was designed, built, operated and maintained by

Department of Defense which serves the initial purpose of tracking

submarines carrying nuclear missiles. The development of the GPS first came

about in the year 1973 with the first four satellites launched in 1978.However

full operational capacity was reached on 17 July 1995 which cost the U.S

Defense about 12 million dollars.