Compassware
Home Best GPS Phone Bluetooth GPS Receiver GPS for Cars FAQs  
 
Newest articles
Best GPS Phone

Bluetooth GPS Receiver

GPS for Cars

FAQs

 
 
 


GPS

How the Military and Civilians use GPS

Computing Time, Velocity and Position

GPS stands for Global Positioning System, which was first developed by the military from funding by the US Department of Defense. Though there are millions of civilian users today, the primary goal of GPS was for it to be operated by the military for which it was designed, in the first place. It enables receivers to position, velocity and time from satellite signals that have been encoded mainly for processing by GPS receivers. GPS can thus be used as a Satellite Navigation System.

GPS has some other uses as well and these include the Space segment, Control segment and User segment. Space segments have space vehicles which are used to send radio signals from space while the control segment is made up of a number of tracking systems located all around the world. The user segment is made up of the GPS receivers and the community of users. Such a receiver can convert the satellite vehicle signals into time, velocity and position estimates.



The main use of GPS is to navigate in three dimensions and navigation receivers are built for ships, airplanes and ground vehicles as well as for hand held devices, used by individuals. Special purpose GPS receivers have been used in astronomy, telecommunications as well as in laboratories. Atmospheric pressure has also been calculated through use of GPS, especially in research projects.

The Precise Positioning System is used by the U.S. military and some Government agencies and has 22 meter horizontal accuracy, 27.7 meter vertical accuracy as well as 200 nanosecond time accuracy. For the civilian user there is the Standard Positioning Services, the use of which does not incur any cost and is unrestricted.

Most receivers can receive and use the Standard Positioning Services. But, it has less accuracy which is purposely done at the will of the Department of Defense, having 100 meter horizontal accuracy, 156 meter vertical accuracy and 340 nanosecond time accuracy.



The GPS Navigation Message is made up of timed data bits that mark the time of transmission for each sub-frame as they are transmitted across by the space vehicles. Common errors that occur are due to noise, bias and blunders. GPS receivers are priced differently, depending on their capabilities and small receivers cost barely US$200 and may even be capable of accepting differential corrections. Other receivers having greater capabilities can cost thousands of dollars, depending on their unique features.

 
To enjoy your time at a dazzling place, all you have to do is check out the Country Club Hills Theater. Offering entertainment seekers with superb shows and hit productions, this place can accommodate more than 120,000 guests. Just like the shows that are performed there, Country Club Hills Theater is a spacious and picturesque. This $7.4 million venue is one of the largest and the latest entertainment complexes in town. With its interesting entertainment along with fantastic food and music, Country Club Hills Theater is perfect to have a great time with your loved ones and family. So get country club hills theater tickets and enjoy the best time of your life. 

Ray Lamontagne and David Gray two legendary singer/songwriters have can be seen performing live this summer! The two artists will be performing live together on a tour around the nation. Fans from far and wide are extremely excited for this event and are trying hard to secure the Cheap Ray Lamontagne & David Gray Tickets in advance. As Cheap Ray Lamontagne & David Gray Tickets are one of a kind item they are expected to sell out fast which is why people want to get hold of them till the stock lasts. To see the two performing live will be a treat for any music fan so book your deal and prepare yourself for this treat!