How GPS Phones Work

Currently available on the market widely circulated mobile phone with integrated GPS. Mobile celebrated like Nokia, Sony Erickson smartphone and Motorola already embed the GPS feature for the new output products. But are you aware how to work and benefit from this GPS Phones? Imagine if you are going to attend a job interview test somewhere so you do not really understand the location you would like to go. Mobile GPS will help you to guide the way to your destination.
Fundamental principles of Mobile GPS
A cellular phone is basically a sophisticated two-way radio. The tower base / base stations and stations, arranged in the network of cells, send and receive radio signals. Mobile devices have low-power transmit signals to convey with the nearest tower.
Once you travel, you move from one cell to a new, and a base station (BTS) to watch phone signal strength. If you move into a cell, the signal strength decreases. Simultaneously, BTS gives you approach you notice that this signal strength increases. Once you move from cell to cell, then this signal tower will transfer signals from cell to the next.
Such as cell phones, GPS relies on radio waves. But rather than using towers on the ground to convey with the GPS satellites that orbit the planet earth. Currently there are 27 GPS satellites in orbit - 24 were actively using and three serve as a backup in case another satellite fails.
To be able to determine your location, the GPS should have the following:
-The location, at least three satellites above you
-Where you stand in relation to the satellite
The receiver then uses three laterasi to look for the precise location. Basically, three laterasi is drawing space / layer around all the three satellites are found. Three layers / space intersect by 50 percent points, one in the sky as well as the other on the ground. The point on a lawn where three space / layers intersect is the location.
At the remote location, the tower could be far away and can not give you a consistent signal. Even when there are many of towers and mountains, tall buildings can obstruct the signal. Sometimes you can find people who have trouble getting a signal within the building, especially in elevators.
Even without GPS, your phone can offer information about your location. A computer can determine where you are based on the measurement of signals, for example cell-to-tower perspective, how long it took the signal to visit some towers and signal strength if you reach the tower.