The Pinpoint Accuracy Explained of GPS and SatNav



GPS or Global Positioning System is a fully functional Worldwide Navigation Satellite System. This system utilizes an artificial constellation of 24 medium Earth orbit satellites. These satellites send microwave signals, hence making it possible for a GPS receiver to determine its area, speed, direction and time. This system was established by United States Department of Defense and was called as NAVSTAR GPS which was offered by Mr. John Walsh.

This satellite constellation is handled by United States Flying force 50th Area Wing. The cost is around 750 US dollars every year, consisting of the maintenance expense, replacement, research and development. After shoot down of Korean Air Lines Flight 007 in the year 1983, a regulation was released making the GPS readily available for civilian use and has been used thoroughly since then. It has become a very helpful tool for making maps, surveying landscapes, commerce and many scientific uses. It also supplies time recommendation which can be used in numerous applications which include research study of earthquake and telecommunication network synchronization.

A GPS receiver just calculates the distance between itself and three more GPS satellite. Each satellite has an atomic clock in it continuously sends specific data including its exact time, location of the transmitting satellite and the almanac. The receiver then determines the reception time of the signal. Therefore the distance to each satellite is understood. Knowing three such ranges, a trilateration is formed. By Using a 4th satellite, require for a clock at receiver is avoided.

The Global Positioning System is used in a variety of Military and Civilian Applications. It allows soldiers discover their objectives in a dark or entirely unfamiliar territory and coordinate troop movement and supplies. GPS receivers which military workers utilize are called Leaders and Soldier Digital Assistants. A combination of GPS and communication through radio allows real time automobile tracking.

It is also utilized in marking targets as hostile and makes it possible for the accuracy directed munitions to permit them engage these targets with high accuracy. Air to Ground roles of military aircrafts use GPS to discover targets. GPS also allows targeting for military weapons like ICBMs, Cruise missiles, precision directed missile. Artillery based projectiles are embedded with GPS receivers and can endure forces approximately 12,000 G. These are used for 155 mm Howitzers. Any Downed pilot can be quickly located if he has GPS receiver. It is commonly used by military for reconnaissance and mapping. Some GPS satellites likewise have nuclear detonation detectors.

GPS helps civilians a lot in surveying and navigation. Its ability to determine regional speed and orientation is exceptionally useful. Time transfer is possible because of its ability to integrate clock. An extensively utilized example of use of GPS is CDMA digital cell phone. Each base utilizes a GPS timing receiver to synchronize the codes with various base stations and hence making it easy inter-cellular hand off and therefore support emergency telephone call and other numerous applications. GPS devices has actually likewise changed tectonics by determining the fault motion throughout earthquakes.

The two GPS developers, Ivan Getting and Bradford Parkinson have actually gotten national academy of Engineering Charles Stark Draper prize during year 2003. Roger L Easton got National Medal for innovation on February 13, 2006. Other similar tracking systems are Beidou, which has actually been established by China and is proposed to be expanded into COMPASS; Galilieo, which is been established by European Union together with numerous other countries like India and China; GLONASS, which is been established by Russia is totally available in collaboration with India; IRNSS is India’s proposed regional system and QZSS which has been proposed by Japan.